1
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Winhard B, Gomez-Gomez A, Maragno LG, Gomes DR, Furlan KP. Achieving High-Temperature Stable Structural Color through Nanostructuring in Polymer-Derived Ceramics. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22379-22390. [PMID: 38636939 PMCID: PMC11071046 DOI: 10.1021/acsami.4c01047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/12/2024] [Accepted: 03/13/2024] [Indexed: 04/20/2024]
Abstract
Structural colors offer a myriad of advantages over conventional pigment-based colors, which often rely on toxic chemical substances that are prone to UV degradation. To take advantage of these benefits in demanding environments, there is growing interest in producing structural colors from ceramics. Polymer-derived ceramics (PDCs) emerge as a compelling choice, presenting two distinct advantages: their enhanced shape ability in their polymeric state associated with impressive temperature resistance once converted to ceramics. This study pioneers the fabrication of noniridescent structural colors from silicon oxycarbide (SiOC) PDC, enabled by the nanostructuring of an inverse photonic glass within the PDC material. This design, a functionally graded material with an inverse photonic glass (FGM-PhG) structure, leverages the innate light-absorbing properties of SiOC, yielding a vivid structural color that maintains its saturation even in white surroundings. This study elucidates the process-structure-properties relationship for the obtained structural colors by investigating each layer of the functionally graded material (FGM) in a stepwise coating deposition process. To further emphasize the exceptional processing flexibility of PDCs, the three-step process is later transferred to an additive manufacturing approach. Finally, the FGM-PhG structural colors are demonstrated to have remarkable thermal stability up to 1000 °C for 100 h, possibly making them the most thermally stable ceramic structural colors to date.
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Affiliation(s)
- Benedikt
F. Winhard
- Hamburg University of Technology,
Institute of Advanced Ceramics, Integrated
Materials Systems Group, Denickestraße 15, 21073 Hamburg, Germany
| | - Alberto Gomez-Gomez
- Hamburg University of Technology,
Institute of Advanced Ceramics, Integrated
Materials Systems Group, Denickestraße 15, 21073 Hamburg, Germany
| | - Laura G. Maragno
- Hamburg University of Technology,
Institute of Advanced Ceramics, Integrated
Materials Systems Group, Denickestraße 15, 21073 Hamburg, Germany
| | - Diego Ribas Gomes
- Hamburg University of Technology,
Institute of Advanced Ceramics, Integrated
Materials Systems Group, Denickestraße 15, 21073 Hamburg, Germany
| | - Kaline P. Furlan
- Hamburg University of Technology,
Institute of Advanced Ceramics, Integrated
Materials Systems Group, Denickestraße 15, 21073 Hamburg, Germany
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2
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Kim JY, Kim BG, Jang W, Wang DH. In Situ Interfacial-Assembly Perovskite Quantum Dot via Marangoni and Capillary Convection Manipulation for Robust Luminescence. ACS APPLIED MATERIALS & INTERFACES 2023; 15:49911-49919. [PMID: 37846870 DOI: 10.1021/acsami.3c12992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
In solid substrates, colloidal solutions produce irregular deposits on the surface by Marangoni flow and capillary flow during evaporation. Reportedly, perovskite quantum dots (PQDs) as a colloidal solution have irregular surfaces based on a similar principle as the coffee ring effect in QD systems when droplets evaporate from the substrate. Given that this issue is due to the direction of Marangoni and capillary flows, the substrate is tilted to change the direction of the flows. The appropriate angle is determined by controlling the angle of the substrate so that the two flows circulate similarly; this method is called "assembly-coating". Herein, we compare the PL intensity before and after the thermal evaporation of the thin films prepared by conventional and assembly-coating. Moreover, by characterizing the diode device (hole-only space charge limited current) for each coating process, the charge carrier characteristics are investigated in detail. Therefore, we suggest a facile strategy to obtain a uniform surface and thermal evaporative stability using colloidal solutions. This strategy is effective in designing surface uniformity and light-emitting layers for colloidal solution deposition and assembly.
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Affiliation(s)
- Jin Young Kim
- School of Intelligent Semiconductor Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Byung Gi Kim
- School of Intelligent Semiconductor Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Woongsik Jang
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Dong Hwan Wang
- School of Intelligent Semiconductor Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
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3
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Kumar S, Basavaraj MG, Satapathy DK. Effect of Colloidal Surface Charge on Desiccation Cracks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37449959 DOI: 10.1021/acs.langmuir.3c01326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
We report the effect of polarity and surface charge density on the nucleation and growth kinetics of desiccation cracks in deposits of colloids formed by drying. We show that the average spacing between desiccation cracks and crack opening are higher for the deposit of positively charged colloids than that of negatively charged colloids. The temporal evolution of crack growth is found to be faster for positively charged particle deposits. The distinct crack patterns and their kinetics are understood by considering the spatial arrangement of particles in the deposit, which is strongly influenced by the substrate-particle and particle-particle interactions. Interestingly, the crack spacing, the crack opening, and the rate at which the crack widens are found to increase upon decreasing the surface charge of the colloids.
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Affiliation(s)
- Sanket Kumar
- Soft Materials Laboratory, Department of Physics, IIT Madras, Chennai 600036, India
- Polymer Engineering and Colloid Science Laboratory, Department of Chemical Engineering, IIT Madras, Chennai 600036, India
- Center for Soft and Biological Matter, IIT Madras, Chennai 600036, India
| | - Madivala G Basavaraj
- Polymer Engineering and Colloid Science Laboratory, Department of Chemical Engineering, IIT Madras, Chennai 600036, India
- Center for Soft and Biological Matter, IIT Madras, Chennai 600036, India
| | - Dillip K Satapathy
- Soft Materials Laboratory, Department of Physics, IIT Madras, Chennai 600036, India
- Center for Soft and Biological Matter, IIT Madras, Chennai 600036, India
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4
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Yadav AS, Tran DT, Teo AJT, Dai Y, Galogahi FM, Ooi CH, Nguyen NT. Core-Shell Particles: From Fabrication Methods to Diverse Manipulation Techniques. MICROMACHINES 2023; 14:497. [PMID: 36984904 PMCID: PMC10054063 DOI: 10.3390/mi14030497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Core-shell particles are micro- or nanoparticles with solid, liquid, or gas cores encapsulated by protective solid shells. The unique composition of core and shell materials imparts smart properties on the particles. Core-shell particles are gaining increasing attention as tuneable and versatile carriers for pharmaceutical and biomedical applications including targeted drug delivery, controlled drug release, and biosensing. This review provides an overview of fabrication methods for core-shell particles followed by a brief discussion of their application and a detailed analysis of their manipulation including assembly, sorting, and triggered release. We compile current methodologies employed for manipulation of core-shell particles and demonstrate how existing methods of assembly and sorting micro/nanospheres can be adopted or modified for core-shell particles. Various triggered release approaches for diagnostics and drug delivery are also discussed in detail.
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Affiliation(s)
- Ajeet Singh Yadav
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Du Tuan Tran
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Adrian J. T. Teo
- HP-NTU Digital Manufacturing Corporate Lab, Nanyang Technological University, Singapore 637460, Singapore
| | - Yuchen Dai
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Fariba Malekpour Galogahi
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Chin Hong Ooi
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
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5
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Gao J, Sun D, Li Z, Zhang Z, Qu Z, Yun Y, Min F, Lv W, Guo M, Ye Y, Yang Z, Qiao Y, Song Y. Orientation-Controlled Ultralong Assembly of Janus Particles Induced by Bubble-Driven Instant Quasi-1D Interfaces. J Am Chem Soc 2023; 145:2404-2413. [PMID: 36656650 DOI: 10.1021/jacs.2c11429] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Constructing precisely oriented assemblies and exploring their orientation-dependent properties remain a challenge for Janus nanoparticles (JNPs) due to their asymmetric characteristics. Herein, we propose a bubble-driven instant quasi-1D interfacial strategy for the oriented assembly of JNP chains in a highly controllable manner. It is found that the rapid formation of templated bubbles can promote the interfacial orientation of JNPs kinetically, while the confined quasi-1D interface in the curved liquid bridge can constrain the disordered rotation of the particles, yielding well-oriented JNP chains in a long range. During the evaporation process, the interfacial orientation of the JNPs can be transferred to the assembled chains. By regulating the amphiphilicity of the JNPs, both heteraxial and coaxial JNP assemblies are obtained, which show different polarization dependences on light scattering, and the related colorimetric logic behaviors are demonstrated. This work demonstrates the great potential of patterned interfacial assembly with a manageable orientation and shows the broad prospect of asymmetric JNP assembly in constructing novel optoelectronic devices.
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Affiliation(s)
- Jie Gao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Dayin Sun
- Department of Chemical Engineering, Tsinghua University, Beijing100084, P. R. China
| | - Zheng Li
- State Key Laboratory of Trauma, Burn and Combined Injury, Institute of Burn Research, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing400038, China
| | - Zeying Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China
| | - Zhiyuan Qu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Yang Yun
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Fanyi Min
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Wenkun Lv
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Mengmeng Guo
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Yilan Ye
- Department of Chemical Engineering, Tsinghua University, Beijing100084, P. R. China
| | - Zhenzhong Yang
- Department of Chemical Engineering, Tsinghua University, Beijing100084, P. R. China
| | - Yali Qiao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Yanlin Song
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Green Printing, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing100190, P. R. China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing100049, P. R. China
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6
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Control of the Drying Patterns for Complex Colloidal Solutions and Their Applications. NANOMATERIALS 2022; 12:nano12152600. [PMID: 35957030 PMCID: PMC9370329 DOI: 10.3390/nano12152600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/24/2022] [Accepted: 07/25/2022] [Indexed: 12/02/2022]
Abstract
The uneven deposition at the edges of an evaporating droplet, termed the coffee-ring effect, has been extensively studied during the past few decades to better understand the underlying cause, namely the flow dynamics, and the subsequent patterns formed after drying. The non-uniform evaporation rate across the colloidal droplet hampers the formation of a uniform and homogeneous film in printed electronics, rechargeable batteries, etc., and often causes device failures. This review aims to highlight the diverse range of techniques used to alleviate the coffee-ring effect, from classic methods such as adding chemical additives, applying external sources, and manipulating geometrical configurations to recently developed advancements, specifically using bubbles, humidity, confined systems, etc., which do not involve modification of surface, particle or liquid properties. Each of these methodologies mitigates the edge deposition via multi-body interactions, for example, particle–liquid, particle-particle, particle–solid interfaces and particle–flow interactions. The mechanisms behind each of these approaches help to find methods to inhibit the non-uniform film formation, and the corresponding applications have been discussed together with a critical comparison in detail. This review could pave the way for developing inks and processes to apply in functional coatings and printed electronic devices with improved efficiency and device yield.
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7
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Zavarzin SV, Kolesnikov AL, Budkov YA, Barash LY. Influence of fluid flows on electric double layers in evaporating colloidal sessile droplets. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2022; 45:24. [PMID: 35288808 DOI: 10.1140/epje/s10189-022-00178-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
A model is developed for describing the transport of charged colloidal particles in an evaporating sessile droplet on the electrified metal substrate in the presence of a solvent flow. The model takes into account the electric charge of colloidal particles and small ions produced by electrolytic dissociation of the active groups on the colloidal particles and solvent molecules. We employ a system of self-consistent Poisson and Nernst-Planck equations for electric potential and average concentrations of colloidal particles and ions with the appropriate boundary conditions. The fluid dynamics, temperature distribution and evaporation process are described with the Navier-Stokes equations, equations of heat conduction and vapor diffusion in air, respectively. The developed model is used to carry out a first-principles numerical simulation of charged silica colloidal particle transport in an evaporating aqueous droplet. We find that electric double layers can be destroyed by a sufficiently strong fluid flow.
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Affiliation(s)
- Semen V Zavarzin
- School of Applied Mathematics, HSE University, Moscow, Russia, 101000
| | - Andrei L Kolesnikov
- Institut für Nichtklassische Chemie e.V., Permoserstr. 15, Leipzig, 04318, Germany
| | - Yury A Budkov
- School of Applied Mathematics, HSE University, Moscow, Russia, 101000
- Landau Institute for Theoretical Physics, Chernogolovka, Russia, 142432
| | - Lev Yu Barash
- Landau Institute for Theoretical Physics, Chernogolovka, Russia, 142432.
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8
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Li P, Zhou B, Ge M, Jing X, Yang L. Metal coordination induced SERS nanoprobe for sensitive and selective detection of histamine in serum. Talanta 2022; 237:122913. [PMID: 34736650 DOI: 10.1016/j.talanta.2021.122913] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/13/2021] [Accepted: 09/29/2021] [Indexed: 12/29/2022]
Abstract
Sensitivity and credibility detecting histamine (HA) as an important neurotransmitter in biofluids is of importance in analytical science and physiology. Surface-enhanced Raman spectroscopy (SERS) is able to realize the high sensitivity with single molecules level, but providing the high sensitivity for HA with a small cross section remains a challenge. Here we develop the metal complex-based SERS nanoprobe nitrilotriacetic acid-Ni2+ (NTA-Ni2+) combined with self-assemble Au NPs active substrates for sensitive detection of HA. The NTA-Ni2+ can capture the HA molecules close to Au NPs substrates and then amplify the Raman signals of HA owing to the formation of a complex of NTA-Ni2+-HA. The self-assemble Au film through the evaporation-driven method can provide the high-density hot spots substrate with high stability and reproducibility. The NTA-Ni2+ decorated Au NPs as nanoprobe responds to HA with 1 μM level of sensitivity. More importantly, the developed SERS nanoprobe composing of NTA-Ni2+ and self-assemble Au NPs can be utilized to detect and monitor the HA spiked into serum, indicating the potential prospect in analysis of HA in complex specimen.
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Affiliation(s)
- Pan Li
- Institute of Health and Medical Technology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, China
| | - Binbin Zhou
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Meihong Ge
- Institute of Health and Medical Technology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, China
| | - Xianghong Jing
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medicine, Beijing, 100700, China.
| | - Liangbao Yang
- Institute of Health and Medical Technology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, China; Department of Pharmacy, Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China.
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9
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Koshkina O, Raju LT, Kaltbeitzel A, Riedinger A, Lohse D, Zhang X, Landfester K. Surface Properties of Colloidal Particles Affect Colloidal Self-Assembly in Evaporating Self-Lubricating Ternary Droplets. ACS APPLIED MATERIALS & INTERFACES 2022; 14:2275-2290. [PMID: 34931807 PMCID: PMC8763378 DOI: 10.1021/acsami.1c19241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/29/2021] [Indexed: 05/05/2023]
Abstract
In this work, we unravel the role of surface properties of colloidal particles on the formation of supraparticles (clusters of colloidal particles) in a colloidal Ouzo droplet. Self-lubricating colloidal Ouzo droplets are an efficient and simple approach to form supraparticles, overcoming the challenge of the coffee stain effect in situ. Supraparticles are an efficient route to high-performance materials in various fields, from catalysis to carriers for therapeutics. Yet, the role of the surface of colloidal particles in the formation of supraparticles using Ouzo droplets remains unknown. Therefore, we used silica particles as a model system and compared sterically stabilized versus electrostatically stabilized silica particles─positively and negatively charged. Additionally, we studied the effect of hydration. Hydrated negatively charged silica particles and sterically stabilized silica particles form supraparticles. Conversely, dehydrated negatively charged silica particles and positively charged amine-coated particles form flat film-like deposits. Notably, the assembly process is different for all the four types of particles. The surface modifications alter (a) the contact line motion of the Ouzo droplet and (b) the particle-oil and particle-substrate interactions. These alterations modify the particle accumulation at the various interfaces, which ultimately determines the shape of the final deposit. Thus, by modulating the surface properties of the colloidal particles, we can tune the shape of the final deposit, from a spheroidal supraparticle to a flat deposit. In the future, this approach can be used to tailor the supraparticles for applications such as optics and catalysis, where the shape affects the functionality.
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Affiliation(s)
- Olga Koshkina
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Lijun Thayyil Raju
- Physics
of Fluids Group, Max Planck Center for Complex Fluid Dynamics, MESA+
Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Anke Kaltbeitzel
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Andreas Riedinger
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Detlef Lohse
- Physics
of Fluids Group, Max Planck Center for Complex Fluid Dynamics, MESA+
Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
- Max
Planck Institute for Dynamics and Self-Organisation, 37077 Göttingen,
Am Fassberg 17, Germany
| | - Xuehua Zhang
- Physics
of Fluids Group, Max Planck Center for Complex Fluid Dynamics, MESA+
Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
- Department
of Chemical and Materials Engineering, University
of Alberta, 12-380 Donadeo Innovation Centre for Engineering, Edmonton, T6G1H9 Alberta, Canada
| | - Katharina Landfester
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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10
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Wang Y, Li P, Lin D, Chen J, Zhang Y, Yang L. Ethanol-extraction SERS strategy for highly sensitive detection of poisons in oily matrix. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 259:119883. [PMID: 33971441 DOI: 10.1016/j.saa.2021.119883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 04/19/2021] [Accepted: 04/24/2021] [Indexed: 06/12/2023]
Abstract
The sensitive detection and identification of toxicants in oily matrices have suffered from difficulty in poisoning incidents, therefore it is necessary to develop the rapid and efficient analytical method to realize the on-site screening and analyzing. In this report, the surface-enhanced Raman spectroscopy (SERS) method was used to detect paraquat and diquat poisons in various oily matrix coupled with solvent extraction. The solvent extraction not only remove interfering impurities of oily substrates, but also can enrich and separate the poisons from oily matrix. It was demonstrated that the ethanol as the extractant was suitable for the rapid separation of poisons such as paraquat (PQ) and diquat (DQ) in oily matrix (soy sauce, pasta sauce, sesame oil, chili oil). Moreover, combined with a handheld Raman spectrometer, the entire detection process was completed within 8 min with the level of 10 ppb PQ and 100 ppb DQ. Furthermore, double-blind experiments verify the reliability of this method. The results demonstrate that this rapid and convenient method could be used for the effective enrichment and sensitive detection of poisons in several oily matrix and has the grate potential application in emergency response and public safety.
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Affiliation(s)
- Yongtao Wang
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
| | - Pan Li
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
| | - Dongyue Lin
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
| | - Jianyi Chen
- Hefei No.Eight Senior High School, Hefei 230071, China
| | - Yunfeng Zhang
- Institute of Forensic Science, Ministry of Public Security, PRC, Beijing 100038, China
| | - Liangbao Yang
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
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11
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Häntsch Y, Shang G, Lei B, Winhard B, Petrov A, Eich M, Holm E, Schneider GA, Furlan KP. Tailoring Disorder and Quality of Photonic Glass Templates for Structural Coloration by Particle Charge Interactions. ACS APPLIED MATERIALS & INTERFACES 2021; 13:20511-20523. [PMID: 33878268 DOI: 10.1021/acsami.1c01392] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
To obtain high-quality homogeneous photonic glass-based structural color films over large areas, it is essential to precisely control the degree of disorder of the spherical particles used and reduce the crack density within the films as much as possible. To tailor the disorder and quality of photonic glasses, a heteroaggregation-based process was developed by employing two oppositely charged equal-sized polystyrene (PS) particle types. The influence of the particle size ratio on the extent of heteroaggregation in the suspension mixes is investigated and correlated with both the morphology and the resultant optical properties of the films. The results show that the oppositely charged particle size ratio within the mix greatly influences the assembled structure in the films, affecting their roughness, crack density, and the coffee-ring formation. To better differentiate the morphology of the films, scanning electron microscopy images of the microstructures were classified by a supervised training of a deep convolutional neural network model to find distinctions that are inaccessible by conventional image analysis methods. Selected compositions were then infiltrated with TiO2 via atomic layer deposition, and after removal of the PS spheres, surface-templated inverse photonic glasses were obtained. Different color impressions and optical properties were obtained depending on the heteroaggregation level and thus the quality of the resultant films. The best results regarding the stability of the films and suppression of coffee-ring formation are obtained with a 35 wt % positively charged over negatively charged particle mix, which yielded enhanced structural coloration associated with improved film quality, tailored by the heteroaggregation fabrication process.
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Affiliation(s)
- Yen Häntsch
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestraße 15, 21073 Hamburg, Germany
| | - Guoliang Shang
- Institute of Optical and Electronic Materials, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany
| | - Bo Lei
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Benedikt Winhard
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestraße 15, 21073 Hamburg, Germany
| | - Alexander Petrov
- Institute of Optical and Electronic Materials, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany
- ITMO University, 49 Kronverkskii Avenue, 197101 St. Petersburg, Russia
| | - Manfred Eich
- Institute of Optical and Electronic Materials, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany
- Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
| | - Elizabeth Holm
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Gerold A Schneider
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestraße 15, 21073 Hamburg, Germany
| | - Kaline P Furlan
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestraße 15, 21073 Hamburg, Germany
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12
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Shi J, Yang L, Bain CD. Wetting and Drying of Aqueous Droplets Containing Nonionic Surfactants C nE m. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4091-4101. [PMID: 33797926 DOI: 10.1021/acs.langmuir.0c03479] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This paper presents a systematic study of the wetting and drying of aqueous pico-liter droplets containing nonionic surfactants polyoxyethylene alkyl ethers (CnEm; n = 10, 12, 14, m = 6 or 8) in comparison with the anionic surfactant sodium dodecyl sulfate (SDS). The spreading and drying of droplets on hydrophilic substrates were studied by tracking the three-phase contact line (TCL) and by interferometry. CnEm droplets undergo phase separation during drying: a water-rich droplet retracts and leaves behind a thin film that is postulated to be a surfactant mesophase. This thin film either retracts or breaks up into small droplets on a longer time scale. The receding contact angle of the water-rich droplet on the thin film in the late stage of drying of CnEm droplets is independent of hydrophobicity of substrates, supporting the inference that a mesophase is present on the surface. Both CnEm and SDS solutions inhibit spreading on hydrophilic surfaces, which is attributed to Marangoni contraction as a result of a surface tension gradient across the gas-liquid interface. More pronounced suppression of spreading is observed in the case of CnEm solutions, possibly due to the phase transition of surfactant solution in the vicinity of the initial TCL leading to a viscous phase at the TCL that pins the droplet. Tracer particle measurements reveal that mild Marangoni flows exist for droplets with surfactant concentrations well above the critical micelle concentration (CMC). Origins of the surfactant gradients that result in Marangoni flows are discussed.
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Affiliation(s)
- Jing Shi
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Lisong Yang
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Colin D Bain
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
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Shi Y, Osada M, Ebina Y, Sasaki T. Single Droplet Assembly for Two-Dimensional Nanosheet Tiling. ACS NANO 2020; 14:15216-15226. [PMID: 33119258 DOI: 10.1021/acsnano.0c05434] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recent advances in two-dimensional (2D) materials offer an opportunity for atomic layer engineering of functional thin films and superlattices. For future applications of 2D materials, there is an urgent need to develop convenient deposition processes that enable precise control of thin-film architectures while reducing the time, cost, and energy/sample consumption. Here, we demonstrate a strategy for nanosheet assembly using a simple drop casting with a pipet and a hot plate. By controlled thermal convection of a single droplet on a hot plate, a range of 2D nanosheets, such as Ti0.87O20.52-, Ca2Nb3O10-, Ru0.95O20.2-, and graphene oxide, can be neatly tiled to form an ideal monolayer on various substrates in ∼30 s over a wide area (i.e., a 50 mmϕ substrate). The mechanism and control strategies are discussed. We also demonstrate the production of various functional coatings such as conducting, semiconducting, insulating, magnetic, and photochromic coatings in multilayer, superlattice, and submicrometer-thick forms, offering the potential for a convenient way to produce high-quality 2D nanosheet films.
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Affiliation(s)
- Yue Shi
- Institute of Materials and Systems for Sustainability (IMaSS) and Department of Materials Chemistry, Nagoya University, Nagoya 464-8601, Japan
| | - Minoru Osada
- Institute of Materials and Systems for Sustainability (IMaSS) and Department of Materials Chemistry, Nagoya University, Nagoya 464-8601, Japan
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Yasuo Ebina
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Takayoshi Sasaki
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Bridonneau N, Zhao M, Battaglini N, Mattana G, Thévenet V, Noël V, Roché M, Zrig S, Carn F. Self-Assembly of Nanoparticles from Evaporating Sessile Droplets: Fresh Look into the Role of Particle/Substrate Interaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11411-11421. [PMID: 32911931 DOI: 10.1021/acs.langmuir.0c01546] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We studied the dependence of solid deposit shape obtained by free drying of sessile drops on particle concentration and Derjaguin-Landau-Verwey-Overbeek (DLVO) particle/substrate interaction. In contrast to previous contributions using pH as a control parameter of interactions, we investigated an unprecedentedly wide range of concentrations and particle/substrate DLVO forces by modifying the nature of the substrate and particles as well as their size and surface chemistry, whereas long-distance repulsive interactions between particles were maintained for most of the drying time. Our main result is that the different shapes of deposits obtained by modifying the particle concentration are the same in the different regimes of concentration regardless of particle/substrate interaction in the studied range of DLVO forces and particle concentrations. The second result is that, contrary to expectations, the dominant morphology of dry patterns at low particle concentration always shows a dotlike pattern for all the studied systems.
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Affiliation(s)
- N Bridonneau
- Université de Paris, Laboratoire Matière et Systèmes Complexes, CNRS, UMR, 7057 Paris, France
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France
| | - M Zhao
- Université de Paris, Laboratoire Matière et Systèmes Complexes, CNRS, UMR, 7057 Paris, France
| | - N Battaglini
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France
| | - G Mattana
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France
| | - V Thévenet
- Université de Paris, Laboratoire Matière et Systèmes Complexes, CNRS, UMR, 7057 Paris, France
| | - V Noël
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France
| | - M Roché
- Université de Paris, Laboratoire Matière et Systèmes Complexes, CNRS, UMR, 7057 Paris, France
| | - S Zrig
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J-A de Baïf, F-75013 Paris, France
| | - F Carn
- Université de Paris, Laboratoire Matière et Systèmes Complexes, CNRS, UMR, 7057 Paris, France
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Richard E, Dubois T, Allion-Maurer A, Jha PK, Faille C. Hydrophobicity of abiotic surfaces governs droplets deposition and evaporation patterns. Food Microbiol 2020; 91:103538. [PMID: 32539949 DOI: 10.1016/j.fm.2020.103538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/16/2020] [Accepted: 04/25/2020] [Indexed: 11/18/2022]
Abstract
Surface contamination with droplets containing bacteria is of concern in the food industry and other environments where hygiene control is essential. Deposition patterns after the drying of contaminated droplets is affected by numerous parameters. The present study evaluated the rate of evaporation and the shape of deposition patterns after the drying of water droplets on a panel of materials with different surface properties (topography, hydrophobicity). The influence of the particle properties (in this study 1 μm-microspheres and two bacterial spores) was also investigated. Polystyrene microspheres were hydrophobic, while Bacillus spores were hydrophilic or hydrophobic, and surrounded by different surface features. In contrast to material topography, hydrophobicity was shown to deeply affect droplet evaporation, with the formation of small, thick deposits with microspheres or hydrophilic spores. Among the particle properties, the spore morphology (size and round/ovoid shape) did not clearly affect the deposition pattern. Conversely, hydrophobic spores aggregated to form clusters, which quickly settled on the materials and either failed to migrate, or only migrated to a slight extent on the surface, resulting in a steady distribution of spores or spore clusters over the whole contaminated area. Adherent bacteria or spores are known to be highly resistant to many stressful environmental conditions. In view of all the quite different patterns obtained following drying of spore-containing droplets, it seems likely that some of these would entail enhanced resistance to hygienic processes.
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Affiliation(s)
- Elodie Richard
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, F-59000, Lille, France
| | - Thomas Dubois
- Univ. Lille, CNRS, INRAE, ENSCL, UMET, F-59650, Villeneuve d'Ascq, France
| | - Audrey Allion-Maurer
- Aperam Isbergues Research Center - Solutions Dept., BP 15, F-62330, Isbergues, France
| | - Piyush Kumar Jha
- Univ. Lille, CNRS, INRAE, ENSCL, UMET, F-59650, Villeneuve d'Ascq, France
| | - Christine Faille
- Univ. Lille, CNRS, INRAE, ENSCL, UMET, F-59650, Villeneuve d'Ascq, France.
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Whitby CP, Hermant A. Concentration of deposit patterns by nanoparticles modified with short amphiphiles. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124648] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Assembling PVP-Au NPs as portable chip for sensitive detection of cyanide with surface-enhanced Raman spectroscopy. Anal Bioanal Chem 2020; 412:2863-2871. [PMID: 32112131 DOI: 10.1007/s00216-020-02517-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/09/2020] [Accepted: 02/13/2020] [Indexed: 10/24/2022]
Abstract
Cyanide (C≡N) can lead to blood, cardiovascular system, and nervous system disorders owing to the acute and chronic toxicity; thus, aiming at the group or individual poisoning incidents, it is necessary to develop the sensitive and credible method for rapid on-site detection of poisons cyanide. Surface-enhanced Raman spectroscopy (SERS) with the advantages of providing fingerprint information of target molecules and single-molecules sensitivity has been widely used in on-site analysis; however, the SERS measurements always suffer from the problem of the stability of substrates. Here, the polyvinylpyrrolidone (PVP)-stabilized Au NPs (PVP-Au NPs) have been assembled through the simple, convenient evaporation-induced strategy with the large-scale hotspots substrates. The presence of PVP can not only facilitate the assembly of Au NPs but also prevent the corrosion of CN- towards the Au NPs with the formation of [Au (CN)2]-1, providing high stable and reproducible SERS signals. Moreover, the PVP-Au NPs have been assembled on the Si wafer to fabricate the portable SERS chip for rapid on-site detection of CN- with an RSD of 5.8% and limitation of 100 ppb. Furthermore, by coupling a portable Raman spectrometer, the SERS spectra of CN- spiked into different specimens to simulate the poison samples have been collected and analyzed on SERS chips with the recovery of 89-103% and RSD not higher than 11.3%. Consequently, the fabricated SERS chip with assembled PVP-Au NPs can provide sensitive and credible detection for CN- in different specimens, and then would satisfy the rapid on-site evaluation of CN- in poisoning incidents with the portable Raman spectrometer. Graphical Abstract.
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Weissman A, Klimovsky H, Harel D, Ron R, Oheim M, Salomon A. Fabrication of Dipole-Aligned Thin Films of Porphyrin J-Aggregates over Large Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:844-851. [PMID: 31912741 DOI: 10.1021/acs.langmuir.9b02754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report a new approach for large-scale alignment of micron-sized J-aggregates of a derivative of porphyrin onto planar glass substrates. We applied a unidirectional nitrogen flow to an aqueous dye drop deposited onto a glass substrate to form an about 5 nm thick film of aligned J-aggregates over macroscopic surface areas up to several millimeters. The inter-aggregate distance is ∼500 nm, and it scales with the nitrogen pressure. We verified the film thickness and J-aggregate alignment using multimodal microscopy and spectroscopy techniques. Our technique is fast, simple, and cost-effective for producing large two-dimensional (2-D) arrays of aligned emitters.
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Affiliation(s)
- Adam Weissman
- Department of Chemistry, Institute of Nanotechnology and Advanced Materials (BINA) , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Hodaya Klimovsky
- Department of Chemistry, Institute of Nanotechnology and Advanced Materials (BINA) , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Dor Harel
- Department of Chemistry, Institute of Nanotechnology and Advanced Materials (BINA) , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Racheli Ron
- Department of Chemistry, Institute of Nanotechnology and Advanced Materials (BINA) , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Martin Oheim
- Université de Paris, SPPIN - Saints-Pères Paris Institute for the Neurosciences, CNRS , F-75006 Paris , France
| | - Adi Salomon
- Department of Chemistry, Institute of Nanotechnology and Advanced Materials (BINA) , Bar-Ilan University , Ramat-Gan 5290002 , Israel
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Role of surfactant in controlling the deposition pattern of a particle-laden droplet: Fundamentals and strategies. Adv Colloid Interface Sci 2020; 275:102049. [PMID: 31757386 DOI: 10.1016/j.cis.2019.102049] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/21/2019] [Accepted: 10/15/2019] [Indexed: 11/24/2022]
Abstract
Evaporation of particle-laden droplets has attracted wide attention propelled by the vast applications from disease diagnostics, bio-medicines, agriculture, inkjet printing to coating. Surfactant plays a vital role in controlling the deposition patterns of dried droplets, thanks to its extensive influences on particle transport through adsorbing at particle surface and droplet interfaces as well as suppressing or facilitating multiple flows. In order to accurately control the subtle morphology of a deposition, it is of significance to systematically elaborate the microscopic functions of surfactant, and bridge them to the various phenomena of a droplet. In this review, we first elucidate the effects of surfactant on the flow paradigms of capillary flow, solutal Marangoni flow, thermal Marangoni flow, and the mixed flow patterns as capillary force, thermal and solutal surface tensions are in competence or collaboration. Second, surfactant adsorption at particle surface and droplet interfaces modifying short-range and long-range forces such as electrostatic force, van der Waals force, capillary attraction, and hydrophobic bonding among particles and between particles and interfaces are introduced by the underlying mechanisms and approaches. Two phase diagrams are developed to respectively illustrate the roles of capillary force among particles, and the electrostatic interaction between particles and solid-liquid interface in modifying the deposition profiles. This review could build a fundamental framework of knowledge for evaporating particle-laden surfactant solution droplets, and may shed light on strategies to manipulate particle deposition in abundant fluidic-based techniques.
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20
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Jambon-Puillet E. Stains from Freeze-Dried Drops. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5541-5548. [PMID: 30933562 PMCID: PMC6484381 DOI: 10.1021/acs.langmuir.9b00084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/12/2019] [Indexed: 06/09/2023]
Abstract
The evaporation of droplets of colloidal suspensions onto a surface is a common tool to achieve surface coatings and self-assembly. However, because of the spontaneous flow developing within an evaporating drop, the deposit is difficult to control, and an unwanted ring-like structure often forms, with particles aggregating along the drop edge. Here, by freezing the drops before sublimating them in dry air we propose a new approach that produces a different kind of stain where most particles are clustered in the center of the drops instead. We demonstrate that these deposits can be continuously tuned from wide but thin to concentrated and thick by varying the droplet's aspect ratio. Unlike evaporated liquid drops, stains from freeze-dried drops do not depend on the drying conditions or substrate roughness and possess a porous and branched microstructure somewhat reminiscent of freeze-casted ceramics. With these stains being governed by the freezing process rather than the drying, this opens alternative ways to control colloidal deposits.
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Shi J, Yang L, Bain CD. Drying of Ethanol/Water Droplets Containing Silica Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2019; 11:14275-14285. [PMID: 30901186 DOI: 10.1021/acsami.8b21731] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The evaporation of colloidal drop on a substrate with a pinned contact line usually results in a ring stain (the so-called coffee-ring effect). In this paper, we present an investigation of the evaporation of sessile picoliter droplets of binary solvent mixtures containing fumed silica nanoparticles (NPs). The internal flows in ethanol/water droplets are suppressed, and a uniform deposit morphology is achieved with a low loading (0.2-0.5 vol %) of hydrophobic fumed silica NPs. The effective control of the particle deposit morphology is based on a rapid sol-gel transition assisted by preferential evaporation of ethanol. For droplets of dilute suspensions, the fumed silica NPs tend to agglomerate and form an elastic network quickly, starting from the region close to the three-phase contact line and below the gas-liquid interface and growing toward the interior of the droplet as the solvents evaporate and the surface descends. Higher silica particle concentrations, lower ethanol concentrations, and weaker Marangoni flows all contribute to the sol-gel transition and hence to the suppression of the coffee-ring effect.
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Affiliation(s)
- Jing Shi
- Department of Chemistry , Durham University , Durham DH1 3LE , U.K
| | - Lisong Yang
- Department of Chemistry , Durham University , Durham DH1 3LE , U.K
| | - Colin D Bain
- Department of Chemistry , Durham University , Durham DH1 3LE , U.K
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22
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Molchanov SP, Roldughin VI, Chernova-Kharaeva IA, Senchikhin IN. The Effect of Electrokinetic Potential on Evaporation of Colloidal Dispersion Droplets. COLLOID JOURNAL 2019. [DOI: 10.1134/s1061933x19020091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Al-Milaji KN, Zhao H. Probing the Colloidal Particle Dynamics in Drying Sessile Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2209-2220. [PMID: 30630314 DOI: 10.1021/acs.langmuir.8b03406] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Particle deposition and assembly in the vicinity of contact lines of evaporative sessile droplets have been intensively investigated during the past decade. Yet little is known about particle arrangement in the contact-line region initiated by the self-assembled particles at the air-liquid interface and how the particle pinning behaves differently compared with that when particles are transported from the bulk of the sessile droplet to the three-phase contact line. We utilized the dual-droplet inkjet printing process to elucidate the versatility in particle deposition and assembly generated near the contact-line region and demonstrated the influence of such printing technique on particle pinning at the contact line after solvent evaporation. Wetting droplets containing sulfate-functionalized polystyrene (sulfate-PS) nanoparticles were jetted over the supporting droplets with carboxyl-PS nanoparticles, where the interplay between the solvent evaporation and particle transport dictates the final morphology of particle deposition. Depending on the particle size and concentration used in the supporting droplet, different morphologies of particle depositions near the periphery of the supporting droplet have been obtained such as stratified rings, blended rings, and rings of particles mainly from the air-liquid interface. Three characteristic times are considered in this study, namely, total time for solvent evaporation ( tevp), time required for the colloidal particles in the supporting droplet to reach the contact line and form the first layers of deposition ( tps), and time needed for the particles at the interface to reach the contact line ( tpw). The ratios of characteristic times ( tps/ tevp) and ( tps/ tpw) determine the final particle assembly near the contact-line region. The ability to control such particle deposition and assembly could have a direct implication on developing facile, cost-effective technologies essential for patterning heterogeneous structured coatings and devices.
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Affiliation(s)
- Karam Nashwan Al-Milaji
- Department of Mechanical and Nuclear Engineering , Virginia Commonwealth University , BioTech One, 800 East Leigh Street , Richmond , Virginia 23219 , United States
| | - Hong Zhao
- Department of Mechanical and Nuclear Engineering , Virginia Commonwealth University , BioTech One, 800 East Leigh Street , Richmond , Virginia 23219 , United States
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Homede E, Zigelman A, Abezgauz L, Manor O. Signatures of van der Waals and Electrostatic Forces in the Deposition of Nanoparticle Assemblies. J Phys Chem Lett 2018; 9:5226-5232. [PMID: 30145891 DOI: 10.1021/acs.jpclett.8b02052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We evaporate aqueous suspensions in a microchamber to explore the connection between the morphology of the nanoparticle deposits at nanometer resolutions and at micrometer and hundreds of micrometers resolutions. Repulsive or weakly attractive electrical double-layer and van der Waals surface forces render the deposition of detached particles and small aggregates at nanometer resolutions. However, strongly attractive surface forces render the dense deposition of large aggregates. At greater length resolutions, the deposit morphology is further governed by evaporation-mediated transport of particles in the volatile suspension. We use experiment and theory to show that the contributions of the different mechanisms to the deposit morphology are mediated by particle coagulation and by particle adsorption to the substrate. The nanometer deposit morphology and particle transport render the morphology of the deposits at greater length resolutions, where it may take the shape of crude or smooth particulate micropatterns or continuous particulate coating layers.
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Affiliation(s)
- Ekhlas Homede
- Wolfson Department of Chemical Engineering , Technion-Israel Institute of Technology , Haifa , Israel 32000
| | - Anna Zigelman
- Wolfson Department of Chemical Engineering , Technion-Israel Institute of Technology , Haifa , Israel 32000
| | - Ludmila Abezgauz
- Wolfson Department of Chemical Engineering , Technion-Israel Institute of Technology , Haifa , Israel 32000
| | - Ofer Manor
- Wolfson Department of Chemical Engineering , Technion-Israel Institute of Technology , Haifa , Israel 32000
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Mampallil D, Eral HB. A review on suppression and utilization of the coffee-ring effect. Adv Colloid Interface Sci 2018; 252:38-54. [PMID: 29310771 DOI: 10.1016/j.cis.2017.12.008] [Citation(s) in RCA: 235] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 11/29/2017] [Accepted: 12/14/2017] [Indexed: 01/22/2023]
Abstract
Evaporation of sessile droplets containing non-volatile solutes dispersed in a volatile solvent leaves behind ring-like solid stains. As the volatile species evaporates, pinning of the contact line gives rise to capillary flows that transport non-volatile solutes to the contact line. This phenomenon, called the coffee-ring effect, compromises the overall performance of industrially relevant manufacturing processes involving evaporation such as printing, biochemical analysis, manufacturing of nano-structured materials through colloidal and macromolecular patterning. Various approaches have been developed to suppress this phenomenon, which is otherwise difficult to avoid. The coffee-ring effect has also been leveraged to prepare new materials through convection induced assembly. This review underlines not only the strategies developed to suppress the coffee-ring effect but also sheds light on approaches to arrive at novel processes and materials. Working principles and applicability of these strategies are discussed together with a critical comparison.
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Affiliation(s)
- Dileep Mampallil
- Indian Institute of Science Education & Research Tirupati, Mangalam P. O., Tirupati-517507, India.
| | - Huseyin Burak Eral
- Process & Energy Department, 3ME Faculty, TU Delft, Leeghwaterstraat 39, 2628CB Delft, The Netherlands.
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The deposition of colloidal particles from a sessile drop of a volatile suspension subject to particle adsorption and coagulation. J Colloid Interface Sci 2018; 509:195-208. [DOI: 10.1016/j.jcis.2017.08.088] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 08/24/2017] [Accepted: 08/28/2017] [Indexed: 11/17/2022]
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Inkjet Printing of Drug-Loaded Mesoporous Silica Nanoparticles-A Platform for Drug Development. Molecules 2017; 22:molecules22112020. [PMID: 29160839 PMCID: PMC6150386 DOI: 10.3390/molecules22112020] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 11/12/2017] [Accepted: 11/17/2017] [Indexed: 12/22/2022] Open
Abstract
Mesoporous silica nanoparticles (MSNs) have shown great potential in improving drug delivery of poorly water soluble (BCS class II, IV) and poorly permeable (BCS class III, IV) drugs, as well as facilitating successful delivery of unstable compounds. The nanoparticle technology would allow improved treatment by reducing adverse reactions of currently approved drugs and possibly reintroducing previously discarded compounds from the drug development pipeline. This study aims to highlight important aspects in mesoporous silica nanoparticle (MSN) ink formulation development for digital inkjet printing technology and to advice on choosing a method (2D/3D) for nanoparticle print deposit characterization. The results show that both unfunctionalized and polyethyeleneimine (PEI) surface functionalized MSNs, as well as drug-free and drug-loaded MSN-PEI suspensions, can be successfully inkjet-printed. Furthermore, the model BCS class IV drug remained incorporated in the MSNs and the suspension remained physically stable during the processing time and steps. This proof-of-concept study suggests that inkjet printing technology would be a flexible deposition method of pharmaceutical MSN suspensions to generate patterns according to predefined designs. The concept could be utilized as a versatile drug screening platform in the future due to the possibility of accurately depositing controlled volumes of MSN suspensions on various materials.
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Lotito V, Zambelli T. Approaches to self-assembly of colloidal monolayers: A guide for nanotechnologists. Adv Colloid Interface Sci 2017; 246:217-274. [PMID: 28669390 DOI: 10.1016/j.cis.2017.04.003] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 04/04/2017] [Accepted: 04/05/2017] [Indexed: 01/08/2023]
Abstract
Self-assembly of quasi-spherical colloidal particles in two-dimensional (2D) arrangements is essential for a wide range of applications from optoelectronics to surface engineering, from chemical and biological sensing to light harvesting and environmental remediation. Several self-assembly approaches have flourished throughout the years, with specific features in terms of complexity of the implementation, sensitivity to process parameters, characteristics of the final colloidal assembly. Selecting the proper method for a given application amidst the vast literature in this field can be a challenging task. In this review, we present an extensive classification and comparison of the different techniques adopted for 2D self-assembly in order to provide useful guidelines for scientists approaching this field. After an overview of the main applications of 2D colloidal assemblies, we describe the main mechanisms underlying their formation and introduce the mathematical tools commonly used to analyse their final morphology. Subsequently, we examine in detail each class of self-assembly techniques, with an explanation of the physical processes intervening in crystallization and a thorough investigation of the technical peculiarities of the different practical implementations. We point out the specific characteristics of the set-ups and apparatuses developed for self-assembly in terms of complexity, requirements, reproducibility, robustness, sensitivity to process parameters and morphology of the final colloidal pattern. Such an analysis will help the reader to individuate more easily the approach more suitable for a given application and will draw the attention towards the importance of the details of each implementation for the final results.
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Anyfantakis M, Baigl D, Binks BP. Evaporation of Drops Containing Silica Nanoparticles of Varying Hydrophobicities: Exploiting Particle-Particle Interactions for Additive-Free Tunable Deposit Morphology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5025-5036. [PMID: 28446021 DOI: 10.1021/acs.langmuir.7b00807] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We describe the systematic and quantitative investigation of a large number of patterns that emerge after the evaporation of aqueous drops containing fumed silica nanoparticles (NPs) of varying wettabilities for an extended particle concentration range. We show that for a chosen system, the dry pattern morphology is mainly determined by particle-particle interactions (Coulomb repulsion and hydrophobic attraction) in the bulk. These depend on both particle hydrophobicity and particle concentration within the drop. For high and intermediate particle concentrations, interparticle hydrophobic attraction is the dominant factor defining the deposit morphology. With increasing particle hydrophobicity, patterns ranging from rings to domes are observed, arising from the time needed for the drop to gel compared with the total evaporation time. On the contrary, drops of dilute suspensions maintain a finite viscosity during most of the drop lifetime, resulting in dry patterns that are predominantly rings for all particle hydrophobicities. In all investigated systems, the NP concentration corresponded to a large excess of NPs in the bulk compared with the maximal amount that could be adsorbed at available interfaces, making particle-interface interactions such as adsorption of hydrophobic NPs at the air-water interface a negligible contribution over bulk particle-particle interactions. This work emphasizes the advantage of particle surface chemistry in tuning both particle-particle interactions and particle deposition onto solid substrates in a robust manner, without the need for any additive such as a surfactant.
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Affiliation(s)
- Manos Anyfantakis
- École Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Department of Chemistry, PASTEUR , 24 rue Lhomond, 75005 Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR , 75005 Paris, France
| | - Damien Baigl
- École Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Department of Chemistry, PASTEUR , 24 rue Lhomond, 75005 Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR , 75005 Paris, France
| | - Bernard P Binks
- School of Mathematics and Physical Sciences, University of Hull , Hull HU6 7RX, U.K
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30
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Kubrin R, Pasquarelli RM, Waleczek M, Lee HS, Zierold R, do Rosário JJ, Dyachenko PN, Montero Moreno JM, Petrov AY, Janssen R, Eich M, Nielsch K, Schneider GA. Bottom-up Fabrication of Multilayer Stacks of 3D Photonic Crystals from Titanium Dioxide. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10466-10476. [PMID: 27045887 DOI: 10.1021/acsami.6b00827] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A strategy for stacking multiple ceramic 3D photonic crystals is developed. Periodically structured porous films are produced by vertical convective self-assembly of polystyrene (PS) microspheres. After infiltration of the opaline templates by atomic layer deposition (ALD) of titania and thermal decomposition of the polystyrene matrix, a ceramic 3D photonic crystal is formed. Further layers with different sizes of pores are deposited subsequently by repetition of the process. The influence of process parameters on morphology and photonic properties of double and triple stacks is systematically studied. Prolonged contact of amorphous titania films with warm water during self-assembly of the successive templates is found to result in exaggerated roughness of the surfaces re-exposed to ALD. Random scattering on rough internal surfaces disrupts ballistic transport of incident photons into deeper layers of the multistacks. Substantially smoother interfaces are obtained by calcination of the structure after each infiltration, which converts amorphous titania into the crystalline anatase before resuming the ALD infiltration. High quality triple stacks consisting of anatase inverse opals with different pore sizes are demonstrated for the first time. The elaborated fabrication method shows promise for various applications demanding broadband dielectric reflectors or titania photonic crystals with a long mean free path of photons.
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Affiliation(s)
- Roman Kubrin
- Institute of Advanced Ceramics, Hamburg University of Technology (TUHH) , Denickestrasse 15, 21073 Hamburg, Germany
| | - Robert M Pasquarelli
- Institute of Advanced Ceramics, Hamburg University of Technology (TUHH) , Denickestrasse 15, 21073 Hamburg, Germany
| | - Martin Waleczek
- Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11, 20355 Hamburg, Germany
| | - Hooi Sing Lee
- Institute of Optical and Electronic Materials, Hamburg University of Technology , Eissendorfer Strasse 38, 21073 Hamburg, Germany
| | - Robert Zierold
- Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11, 20355 Hamburg, Germany
| | - Jefferson J do Rosário
- Institute of Advanced Ceramics, Hamburg University of Technology (TUHH) , Denickestrasse 15, 21073 Hamburg, Germany
| | - Pavel N Dyachenko
- Institute of Optical and Electronic Materials, Hamburg University of Technology , Eissendorfer Strasse 38, 21073 Hamburg, Germany
| | - Josep M Montero Moreno
- Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11, 20355 Hamburg, Germany
| | - Alexander Yu Petrov
- Institute of Optical and Electronic Materials, Hamburg University of Technology , Eissendorfer Strasse 38, 21073 Hamburg, Germany
- ITMO University , Kronverkskii Avenue 49, 197101, St. Petersburg, Russia
| | - Rolf Janssen
- Institute of Advanced Ceramics, Hamburg University of Technology (TUHH) , Denickestrasse 15, 21073 Hamburg, Germany
| | - Manfred Eich
- Institute of Optical and Electronic Materials, Hamburg University of Technology , Eissendorfer Strasse 38, 21073 Hamburg, Germany
| | - Kornelius Nielsch
- Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11, 20355 Hamburg, Germany
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research Dresden , Helmholtzstrasse 20, 01609 Dresden, Germany
| | - Gerold A Schneider
- Institute of Advanced Ceramics, Hamburg University of Technology (TUHH) , Denickestrasse 15, 21073 Hamburg, Germany
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31
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Anyfantakis M, Baigl D. Manipulating the Coffee-Ring Effect: Interactions at Work. Chemphyschem 2015; 16:2726-2734. [DOI: 10.1002/cphc.201500410] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Indexed: 11/11/2022]
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32
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Anyfantakis M, Geng Z, Morel M, Rudiuk S, Baigl D. Modulation of the coffee-ring effect in particle/surfactant mixtures: the importance of particle-interface interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4113-20. [PMID: 25797472 DOI: 10.1021/acs.langmuir.5b00453] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We study the effect of surfactants on the deposits formed after the evaporation of colloidal suspension drops, at initial concentrations lower than the critical micellar concentrations, for various particle/surfactant mixtures. We show that the surfactant-mediated interactions between particles and the liquid-gas (LG) and liquid-solid (LS) interfaces, rather than the flow patterns, primarily define the morphology of the dry deposit in a robust and reproducible manner. For like-charged particle/surfactant mixtures, most of the particles form a ring-shaped deposit (according to the so-called "Coffee-Ring Effect"), but some particles can also be deposited inside the ring in a way that is modulated by electrostatic interactions between the particles and the LS interface. For oppositely charged systems, surfactant adsorption to the particle surface strongly affects particle-LG interface interactions, which in turn control the deposition pattern. For low surfactant concentrations, coffee-rings are systematically observed. For intermediate concentrations, the charge of surfactant-decorated particles becomes nearly neutral, and their hydrophobicity is enhanced, which promotes particle trapping at the LG interface. A particle skin is formed and its deposition upon drying leads to homogeneous disk-like patterns. For high surfactant concentrations, particle charge is reversed, and coffee-rings are observed again. Notably, this ring-disk-ring evolution of the deposition behavior as a function of surfactant concentration is observed in a variety of mixtures, regardless of particle absolute charge and surface chemistry as well as of surfactant charge and hydrophobicity. Its apparent universal character makes it a promising strategy for a robust control of particle deposition from evaporating drops.
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Affiliation(s)
- Manos Anyfantakis
- Department of Chemistry, Ecole Normale Supérieure-PSL Research University, 24 rue Lhomond, F-75005, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, PASTEUR, F-75005, Paris, France
- CNRS, UMR 8640 PASTEUR, F-75005, Paris, France
| | - Zheng Geng
- Department of Chemistry, Ecole Normale Supérieure-PSL Research University, 24 rue Lhomond, F-75005, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, PASTEUR, F-75005, Paris, France
- CNRS, UMR 8640 PASTEUR, F-75005, Paris, France
| | - Mathieu Morel
- Department of Chemistry, Ecole Normale Supérieure-PSL Research University, 24 rue Lhomond, F-75005, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, PASTEUR, F-75005, Paris, France
- CNRS, UMR 8640 PASTEUR, F-75005, Paris, France
| | - Sergii Rudiuk
- Department of Chemistry, Ecole Normale Supérieure-PSL Research University, 24 rue Lhomond, F-75005, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, PASTEUR, F-75005, Paris, France
- CNRS, UMR 8640 PASTEUR, F-75005, Paris, France
| | - Damien Baigl
- Department of Chemistry, Ecole Normale Supérieure-PSL Research University, 24 rue Lhomond, F-75005, Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, PASTEUR, F-75005, Paris, France
- CNRS, UMR 8640 PASTEUR, F-75005, Paris, France
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33
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Yoo H, Kim C. Experimental studies on formation, spreading and drying of inkjet drop of colloidal suspensions. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.12.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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do Rosário JJ, Dyachenko PN, Kubrin R, Pasquarelli RM, Petrov AY, Eich M, Schneider GA. Facile deposition of YSZ-inverse photonic glass films. ACS APPLIED MATERIALS & INTERFACES 2014; 6:12335-12345. [PMID: 25036409 DOI: 10.1021/am502110p] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An alternative all-colloidal and single-step deposition method of yttrium-stabilized zirconia (YSZ)-infiltrated polymeric photonic glass films is presented. Heterocoagulation of oppositely charged polystyrene (PS) microspheres and YSZ nanocrystals in aqueous dispersions created PS/YSZ core-shell spheres. These composite particles were deposited on glass substrates by a simple drop-coating process. Heterocoagulation impaired self-assembly of the particles, resulting in a disordered structure. Burn-out of the polymer yielded a random array of YSZ shells. The effect of the filling fraction of YSZ between these shells was explored. YSZ-inverse photonic glass films with a thickness below 40 μm achieved 70% reflectance of the incident radiation over a broad wavelength range between 0.4 and 2.2 μm. The YSZ structures demonstrated structural stability up to 1000 °C and maintained high reflectance up to 1200 °C for several hours, thus enabling applications as broadband reflectors at elevated temperatures.
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Affiliation(s)
- Jefferson J do Rosário
- Institute of Advanced Ceramics, Hamburg University of Technology , Denickestrasse 15, 21073 Hamburg, Germany
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35
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“Coffee ring” formation dynamics on molecularly smooth substrates with varying receding contact angles. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.02.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Mukherjee S, Saha A, Santra PK, Sengupta S, Sarma DD. Beyond the “Coffee Ring”: Re-entrant Ordering in an Evaporation-Driven Self-Assembly in a Colloidal Suspension on a Substrate. J Phys Chem B 2014; 118:2559-67. [DOI: 10.1021/jp4124452] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sumanta Mukherjee
- Solid State and
Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Arnab Saha
- Advanced Materials
Research Unit, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700098, India
| | - Pralay K. Santra
- Solid State and
Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Surajit Sengupta
- Centre for Advanced
Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
- TIFR Centre for
Interdisciplinary Sciences, 21 Brundavan
Colony, Narsingi, Hyderabad 500075, India
| | - D. D. Sarma
- Solid State and
Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
- Centre for Advanced
Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
- Council of Scientific and Industrial Research - Network of Institutes for Solar Energy (CSIR-NISE), New Delhi 110001, India
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37
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Affiliation(s)
- Ronald G. Larson
- Dept. of Chemical Engineering; University of Michigan; Ann Arbor MI 48109
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38
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Ganai N, Saha A, Sengupta S. Colloidal particles in a drying suspension: a phase field crystal approach. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2013; 36:90. [PMID: 23942883 DOI: 10.1140/epje/i2013-13090-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 05/03/2013] [Accepted: 07/01/2013] [Indexed: 06/02/2023]
Abstract
Using a phase field crystal model we study the structure and dynamics of a drop of colloidal suspension during evaporation of the solvent. We model an experimental system where contact line pinning of the drop on the substrate is non-existent. Under such carefully controlled conditions, evaporation of the drop produces an ordered or disordered arrangement of the colloidal residue depending only on the initial average density of solute and the drying rate. We obtain a non-equilibrium phase boundary showing amorphous and crystalline phases of single component and binary mixtures of colloidal particles in the density-drying rate plane. While single-component colloids order in the two-dimensional triangular lattice, a symmetric binary mixture of mutually repulsive particles can be ordered into three triangular sub-lattices in two dimensions. Two of them are occupied by the two species of particles with the third sub-lattice vacant.
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Affiliation(s)
- Nirmalendu Ganai
- Department of Physics, Nabadwip Vidyasagar College, Nabadwip, 741302 Nadia, India.
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39
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Thiruvengadathan R, Korampally V, Ghosh A, Chanda N, Gangopadhyay K, Gangopadhyay S. Nanomaterial processing using self-assembly-bottom-up chemical and biological approaches. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2013; 76:066501. [PMID: 23722189 DOI: 10.1088/0034-4885/76/6/066501] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanotechnology is touted as the next logical sequence in technological evolution. This has led to a substantial surge in research activities pertaining to the development and fundamental understanding of processes and assembly at the nanoscale. Both top-down and bottom-up fabrication approaches may be used to realize a range of well-defined nanostructured materials with desirable physical and chemical attributes. Among these, the bottom-up self-assembly process offers the most realistic solution toward the fabrication of next-generation functional materials and devices. Here, we present a comprehensive review on the physical basis behind self-assembly and the processes reported in recent years to direct the assembly of nanoscale functional blocks into hierarchically ordered structures. This paper emphasizes assembly in the synthetic domain as well in the biological domain, underscoring the importance of biomimetic approaches toward novel materials. In particular, two important classes of directed self-assembly, namely, (i) self-assembly among nanoparticle-polymer systems and (ii) external field-guided assembly are highlighted. The spontaneous self-assembling behavior observed in nature that leads to complex, multifunctional, hierarchical structures within biological systems is also discussed in this review. Recent research undertaken to synthesize hierarchically assembled functional materials have underscored the need as well as the benefits harvested in synergistically combining top-down fabrication methods with bottom-up self-assembly.
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40
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Gorr HM, Zueger JM, Barnard JA. Characteristic size for onset of coffee-ring effect in evaporating lysozyme-water solution droplets. J Phys Chem B 2012; 116:12213-20. [PMID: 22998072 DOI: 10.1021/jp307933a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Liquid droplets containing suspended particles deposited on a solid surface often form a ring-like structure due to the redistribution of solute during evaporation, a phenomenon known as the "coffee ring effect". The complex patterns left on the substrate after evaporation are characteristic of the nature of the solute and the particle transport mechanisms. In this study, the morphological evolution and conditions for coffee ring formation for simplified model biological solutions of DI water and lysozyme are examined by AFM and optical microscopy. Lysozyme is a globular protein found in high concentration, for example, in human tears and saliva. The drop diameters studied are very small, ranging from 1 to 50 μm. In this size range, protein motion and the resulting dried residue morphology are highly influenced by the decreased evaporation time of the drop. In this work, we consider the effect of droplet size and concentration on the morphology of the deposited drop as well as the minimal conditions for coffee ring formation in this system. Two distinct deposit types are observed: a simple cap-shaped deposit for drops with small diameters and a ring-like deposit at larger diameters. Ring formation occurs at a critical diameter, which depends systematically on initial lysozyme concentration.
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Affiliation(s)
- Heather Meloy Gorr
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
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41
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Yang L, Wang J, Zhang Y, Luo Y, Li D, Meng Q. In situ optical microspectroscopy monitoring of binary colloidal crystal growth dynamics via evaporation-induced cooperative self-assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:4160-4167. [PMID: 22320329 DOI: 10.1021/la205111v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Real-time monitoring of the binary colloidal crystal (bCC) growth via evaporation-induced cooperative self-assembly (EICSA) was studied by an in situ optical microspectroscopy technique. Evolution of the recorded reflectance spectra reveals that the whole growth process of bCCs via EICSA could be separated into three different stages corresponding to that of unary colloidal crystals because of the same evaporation model. We show the detailed cooperative self-assembly information, including the evolution of the number of layers and filling factors of different components of the growing bCCs using the scalar wave approximation method. Furthermore, when the size ratio and number ratio of the two colloids were varied, the real-time optical properties of the bCCs with various stoichiometric configurations were investigated systematically. This study would be valuable in furthering the current understanding of the bCC growth dynamics via EICSA and tailoring optical properties of hierarchical materials for applications in many fields.
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Affiliation(s)
- Lei Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, People's Republic of China
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42
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Yang L, Zhang Y, Luo J, Luo Y, Gao K, Li D, Meng Q. Real-time studies of evaporation-induced colloidal self-assembly by optical microspectroscopy. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:031605. [PMID: 22060383 DOI: 10.1103/physreve.84.031605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 07/20/2011] [Indexed: 05/31/2023]
Abstract
Real-time monitoring of the whole growth process of evaporation-induced colloidal self-assembly has been conducted using an optical microspectroscopy setup. Our observations suggest that the assembly process can be divided into three different growth stages as evidenced by the variations detected in the reflectance spectra. The thickness variation of the growing colloidal crystal was monitored by examining the Fabry-Perot fringes in the reflectance spectra. Furthermore, the scalar wave approximation was utilized to analyze the evolution of optical properties with growth. More detailed information, including the time dependence of number of layers and volume fraction of water, has been revealed by comparing the experimental and calculated reflectance spectra. The present work demonstrates that in situ real-time microspectroscopy is a promising technique for monitoring and investigating the dynamic process of colloidal self-assembly.
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Affiliation(s)
- Lei Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box, 603, Beijing 100190, China
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43
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Pattern formation in drying of particle-laden sessile drops of polymer solutions on solid substrates. KOREAN J CHEM ENG 2011. [DOI: 10.1007/s11814-011-0084-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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44
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Monteux C, Lequeux F. Packing and sorting colloids at the contact line of a drying drop. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2917-2922. [PMID: 21294553 DOI: 10.1021/la104055j] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this article, we study the drying kinetics of a sessile droplet containing latex particles. We find that a depletion film is left at the edge of the drops, whose width is controlled by two geometric parameters, the contact angle and the diameter of the particles. We show that this effect can be used to sort colloidal mixtures because nanometric colloids always segregate at the edge of the drop, whereas micrometric colloids are blocked further away from the edge. We also provide a simple method to measure the velocity of a micrometric latex as it flows toward the contact line. We find that the particles strongly accelerate at the end of the drying process. Using Deegan's prediction for the rate of evaporation in the vicinity of the contact line, we quantitatively explain this phenomenon by the fact that the contact angle vanishes at the end of the drying process, therefore inducing a strong increase in the flux of water and particles close to the edge. The decrease in the contact angle also controls the width of the ringlike deposit.
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Affiliation(s)
- Cécile Monteux
- PPMD/SIMM, UMR 7615 CNRS-ESPCI-Université Pierre et Marie Curie, ESPCI, 10 rue Vauquelin, 75005 Paris, France
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45
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Yang L, Gao K, Luo Y, Luo J, Li D, Meng Q. In situ observation and measurement of evaporation-induced self-assembly under controlled pressure and temperature. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:1700-1706. [PMID: 21192705 DOI: 10.1021/la104338a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In situ observations of evaporation-induced colloidal self-assembly and in situ measurement of mass transfer process were carried out under a temperature and pressure controlling system. The growth processes of colloidal crystals in different cuvettes recorded by direct video observations revealed that solvent flow around the pore space of the crystal played a key role. By changing the circumstances (temperature and pressure) of the self-assembly system and properties of fluid (viscosity), different evaporation rate of solvent and growth rate of colloidal crystals were measured directly. It turned out that both evaporation rate and growth rate as functions of temperature and pressure fit Stefan's law well. Furthermore, the transfer process of particles in the fluid flow was determined by the fluid-dynamic characteristics, which can be analyzed by the Reynolds number. The results obtained provide an insight into the growth mechanisms of self-assembly and theoretical basis for optimizing the experimental growth conditions of colloidal crystals.
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Affiliation(s)
- Lei Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box, 603, Beijing 100190, China
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46
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Han W, Byun M, Lin Z. Assembling and positioning latex nanoparticles via controlled evaporative self-assembly. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11603g] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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ZHAO Q, NG E, KANG HK, YIP CH, HARTONO MR, WONG CC. REAL TIME VISUALIZATION OF SURFACTANT EFFECTS ON COLLOIDAL SELF-ASSEMBLY. INTERNATIONAL JOURNAL OF NANOSCIENCE 2010. [DOI: 10.1142/s0219581x10006739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Patterned substrates, coupled with surfactant addition, offer a way to exercise more control in the convective self-assembly of colloidal nanospheres. In this work, we investigated the surfactant effects on dynamic colloidal self-assembly during evaporation in a sessile drop. The real time video monitoring revealed that the surfactant plays a dominating role to determine the wetting angle of the colloidal suspension in a sessile drop. Meanwhile, surfactant also had great influence on the cluster formation during assembly process and the final lattice structure.
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Affiliation(s)
- Q. ZHAO
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - E. NG
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - H. K. KANG
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - C. H. YIP
- Singapore MIT Alliance, National University of Singapore, Singapore
| | - M. R. HARTONO
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - C. C. WONG
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
- Singapore MIT Alliance, National University of Singapore, Singapore
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48
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Bhardwaj R, Fang X, Somasundaran P, Attinger D. Self-assembly of colloidal particles from evaporating droplets: role of DLVO interactions and proposition of a phase diagram. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7833-42. [PMID: 20337481 DOI: 10.1021/la9047227] [Citation(s) in RCA: 262] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The shape of deposits obtained from drying drops containing colloidal particles matters for technologies such as inkjet printing, microelectronics, and bioassay manufacturing. In this work, the formation of deposits during the drying of nanoliter drops containing colloidal particles is investigated experimentally with microscopy and profilometry, and theoretically with an in-house finite-element code. The system studied involves aqueous drops containing titania nanoparticles evaporating on a glass substrate. Deposit shapes from spotted drops at different pH values are measured using a laser profilometer. Our results show that the pH of the solution influences the dried deposit pattern, which can be ring-like or more uniform. The transition between these patterns is explained by considering how DLVO interactions such as the electrostatic and van der Waals forces modify the particle deposition process. Also, a phase diagram is proposed to describe how the shape of a colloidal deposit results from the competition among three flow patterns: a radial flow driven by evaporation at the wetting line, a Marangoni recirculating flow driven by surface tension gradients, and the transport of particles toward the substrate driven by DLVO interactions. This phase diagram explains three types of deposits commonly observed experimentally, such as a peripheral ring, a small central bump, or a uniform layer. Simulations and experiments are found in very good agreement.
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Affiliation(s)
- Rajneesh Bhardwaj
- Laboratory for Microscale Transport Phenomena, Department of Mechanical Engineering
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Tan KW, Koh YK, Chiang YM, Wong CC. Particulate mobility in vertical deposition of attractive monolayer colloidal crystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7093-7100. [PMID: 20099793 DOI: 10.1021/la904435j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In the colloidal self-assembly of charged particles on surfaces with opposite polarity, disorder often dominates. In this report, we show that ionic strength, volume fraction, and solvent evaporation temperature can be optimized in the vertical deposition method to yield hexagonal close-packed monolayer arrays with positively charged colloids on negatively charged bare glass. We further extend our study to form well-defined binary two-dimensional superlattices with oppositely charged monolayers grown layer-by-layer. Our results suggest that the lack of particulate mobility in oppositely charged systems is the main cause of disorder, and maximum mobility is attained when all three growth parameters are finely adjusted to increase the time scale for the particles to stabilize and order during crystal growth in these attractive systems. A clear understanding and control of the collective behavior of highly mobile colloids could lead to the creation of greater diversity of nanoarchitectures.
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Affiliation(s)
- Kwan Wee Tan
- Advanced Materials for Micro- and Nano-Systems, Singapore-MIT Alliance, Singapore 117576.
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Hanrath T, Choi JJ, Smilgies DM. Structure/processing relationships of highly ordered lead salt nanocrystal superlattices. ACS NANO 2009; 3:2975-2988. [PMID: 19728701 DOI: 10.1021/nn901008r] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We investigated the influence of processing conditions, nanocrystal/substrate interactions and solvent evaporation rate on the ordering of strongly interacting nanocrystals by synergistically combining electron microscopy and synchrotron-based small-angle X-ray scattering analysis. Spin-cast PbSe nanocrystal films exhibited submicrometer-sized supracrystals with face-centered cubic symmetry and (001)(s) planes aligned parallel to the substrate. The ordering of drop-cast lead salt nanocrystal films was sensitive to the nature of the substrate and solvent evaporation dynamics. Nanocrystal films drop-cast on rough indium tin oxide substrates were polycrystalline with small grain size and low degree of orientation with respect to the substrate, whereas films drop-cast on flat Si substrates formed highly ordered face-centered cubic supracrystals with close-packed (111)(s) planes parallel to the substrate. The spatial coherence of nanocrystal films drop-cast in the presence of saturated solvent vapor was significantly improved compared to films drop-cast in a dry environment. Solvent vapor annealing was demonstrated as a postdeposition technique to modify the ordering of nanocrystals in the thin film. Octane vapor significantly improved the long-range order and degree of orientation of initially disordered or polycrystalline nanocrystal assemblies. Exposure to 1,2-ethanedithiol vapor caused partial displacement of surface bound oleic acid ligands and drastically degraded the degree of order in the nanocrystal assembly.
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Affiliation(s)
- Tobias Hanrath
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, USA.
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