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Mena-Hernando S, Eaton M, Fernández-Blázquez JP, López-Moreno A, Pedersen H, Pérez EM. Mechanical Interlocking to Unlock the Reinforcing Potential of Carbon Nanotubes. Chemistry 2023; 29:e202301490. [PMID: 37452643 DOI: 10.1002/chem.202301490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 07/18/2023]
Abstract
Single-walled carbon nanotubes (SWNTs) present extraordinary mechanical properties, with Youngs' modulus>1 TPa and tensile strength>50 GPa; this makes them ideal candidates as fillers for the reinforcement of polymers. However, the performance of SWNTs in this field has fallen behind expectations. This is due to a combination of imperfect individualization of the SWNTs and poor load transfer from the polymer to the SWNTs. Here, we study the reinforcement of polymers of different chemical nature using mechanically interlocked derivatives of single-walled carbon nanotubes (MINTs). We compare the mechanical properties of fibers made of poly (methyl methacrylate) (PMMA) and polysulfone (PSU) and their composites made with pristine SWNTs, MINTs, and the corresponding supramolecular models. With very low loading of MINTs (0.01 % w/w), improvements of more than 100 % on Youngs Modulus and the tensile strength are observed for both the nonpolar aliphatic PMMA and the very polar aromatic PSU polymers, while pristine carbon nanotubes and the supramolecular nanofillers showed smaller reinforcement. These data, together with our previous report on the reinforcement of polystyrene (nonpolar and aromatic), indicate that derivatization of SWNTs as MINTs is a valid general strategy to optimize the interaction between SWNT fillers and the polymer matrix.
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Biswakarma D, Dey N, Bhattacharya S. Hydrogel Nanocomposite Towards Optical Sensing of Spermine in Biomedical and Real-Life Food Samples and Remediation of Toxic Dyes from Wastewater. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:11610-11620. [PMID: 37605815 DOI: 10.1021/acs.langmuir.3c01128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Nanocomposites such as graphene oxide (GO) have been incorporated into hydrogels to enhance conventional hydrogels' properties and develop new functions. Unique and strong molecular interactions between GO and low molecular weight gelators allow the fabrication of various functional hydrogels suitable for different applications. In the present study, we report a stable and soft nanocomposite hydrogel comprising a pyrene-based chiral amphipath having an amino acid (l-phenylalanine) core with pendant oligo-oxyethylene hydrophilic chains and GO. The mechanical and viscoelastic properties of the nanocomposite hydrogel were thoroughly studied using various spectroscopic, microscopic, and mechanical techniques. Even without GO, native hydrogels could form a self-supported thermoreversible and thixotropic hydrogel composed of the fibrillar network. Unlike native hydrogels, the morphological investigation of nanocomposite gels shows the presence of cross-linked nanosheet-like structures. The combined effect of π-π stacking and H-bonding interactions is the driving force for the formation of such composite hydrogels. Moreover, the nanocomposite hydrogels possess significantly superior mechanical stiffness than the native hydrogels. Interestingly, the thixotropic properties observed with the parent gel were retained even in the presence of carbon nanomaterials (GO). The nanocomposite hydrogel could be employed in the optical sensing of a biogenic polyamine, spermine, resulting in a visible gel-to-sol transition. The superior electrostatic interaction between the GOs and spermine molecules might have led to the release of entrapped fluorogenic dyes from the hydrogel network and a turn-on emission response. The sensory system was employed to analyze spermine content in human urine samples and decomposed food items. A gel-coated paper strip was also developed for onsite detection of the spermine. The nanocomposite hydrogel was further utilized to remove toxic organic dyes such as methylene blue (MB) and rhodamine B (RhB) from the aqueous media. The nanocomposite hydrogel thus showed excellent dye removal capabilities and was also found to be recyclable. Calculations of different mechanical parameters suggest that the dye removal efficiency of the nanocomposite hydrogel was better for MB than for RhB.
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Affiliation(s)
- Dipen Biswakarma
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Nilanjan Dey
- Department of Chemistry, Birla Institute of Technology and Sciences-Pilani, Hyderabad, Telangana 700078, India
| | - Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
- Indian Institute of Science Education and Research, Tirupati, Andhra Pradesh 517507, India
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3
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A Review on Synthesis Methods of Phyllosilicate- and Graphene-Filled Composite Hydrogels. JOURNAL OF COMPOSITES SCIENCE 2022. [DOI: 10.3390/jcs6010015] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review discusses, in brief, the various synthetic methods of two widely-used nanofillers; phyllosilicate and graphene. Both are 2D fillers introduced into hydrogel matrices to achieve mechanical robustness and water uptake behavior. Both the fillers are inserted by physical and chemical gelation methods where most of the chemical gelation, i.e., covalent approaches, results in better physical properties compared to their physical gels. Physical gels occur due to supramolecular assembly, van der Waals interactions, electrostatic interactions, hydrophobic associations, and H-bonding. For chemical gelation, in situ radical triggered gelation mostly occurs.
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4
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An R, Zhang X, Han L, Wang X, Zhang Y, Shi L, Ran R. Healing, flexible, high thermal sensitive dual-network ionic conductive hydrogels for 3D linear temperature sensor. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 107:110310. [PMID: 31761153 DOI: 10.1016/j.msec.2019.110310] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/20/2019] [Accepted: 10/12/2019] [Indexed: 10/25/2022]
Abstract
A temperature sensor based on muti-wall carbon nanotubes (MWCNTs) composite polyacrylamide/Fe3+-polyacrylic acid (PAM/Fe3+-PAA) double network (DN) hydrogels that combines flexibility, thermal sensitivity and self-healing ability is fabricated through in situ polymerization and maceration. Due to the excellent thermal conductivity of carbon nanotubes, the temperature sensitivity of the DN hydrogels are improved and therefore can be exploited as a novel channel material for a temperature sensor. This temperature sensor can be stretched from 0 to 750% strain with the sensitivity as high as 9.4%/°Cat extreme 200% strain. Importantly, the DN hydrogels have excellent self-healing properties that it can still be stretched after cutting and healing. Similarly, the electrical and thermal sensing properties of the DN hydrogels can be self-healed analogous to the self-healing capability of human skin. In addition, DN hydrogels have high stability for bending and torsion, which can avoid errors caused by deformation in the temperature measurement. In order to attaching on nonplanar curvilinear surfaces for practical temperature detection, we designed a linear-shaped hydrogels temperature sensor, which can improve the accuracy by wrapping the surface of the measured object completely in a way that eliminates the influence of air in the holes, enabling it to be potentially integrated in soft robots to grasp real-world information for guiding their actions.
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Affiliation(s)
- Ran An
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Xiaoyu Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Linglin Han
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Xiangdong Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Yulin Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Lingying Shi
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Rong Ran
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China.
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5
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6
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Rizzo C, Marullo S, Dintcheva NT, D'Anna F. Carbon Nanomaterial Doped Ionic Liquid Gels for the Removal of Pharmaceutically Active Compounds from Water. Molecules 2019; 24:molecules24152788. [PMID: 31370238 PMCID: PMC6696249 DOI: 10.3390/molecules24152788] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 01/04/2023] Open
Abstract
Due to large drug consumption, pharmaceutically active compounds (PhACs) can be found as water contaminants. The removal of PhACs is a significant issue, as they can easily overtake traditional purification methods. Because of their surface properties, carbon nanomaterials are among the most efficient materials able to adsorb PhACs. However, their limitation is their recovery after use and their possible leakage into the aquatic system. Consequently, new hybrid supramolecular ionic liquid gels (HILGs) have been designed for the adsorption of some antibiotic drugs (ciprofloxacin and nalidixic acid) from water. The chemical–physical properties of gels, such as the temperature of the gel–sol transition, morphology, and rheology, have been studied for their use as sorbents. These properties influence the gel removal efficiency of PhAC, i.e., the best system is the gel that presents weaker colloidal forces. A fast removal (RE = 51%) is obtained in 3 h for ciprofloxacin, while a slower adsorption process is observed for nalidixic acid (RE = 88% in 24 h). HILGs can be recycled up to seven cycles and regenerated. In addition, they can be used with higher concentrations or volumes of PhAC and in a realistic apparatus like dialysis membranes. These peculiarities suggest that HILGs can be competitive with more complex sorbent systems.
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Affiliation(s)
- Carla Rizzo
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy
| | - Salvatore Marullo
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy
| | - Nadka Tz Dintcheva
- Dipartimento di Ingegneria, Università degli Studi di Palermo, Viale delle Scienze Ed. 8, 90128 Palermo, Italy
| | - Francesca D'Anna
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy.
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7
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Peveler WJ, Packman H, Alexander S, Chauhan RR, Hayes LM, Macdonald TJ, Cockcroft JK, Rogers S, Aarts DGAL, Carmalt CJ, Parkin IP, Bear JC. A new family of urea-based low molecular-weight organogelators for environmental remediation: the influence of structure. SOFT MATTER 2018; 14:8821-8827. [PMID: 30346465 PMCID: PMC6256360 DOI: 10.1039/c8sm01682h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/10/2018] [Indexed: 06/08/2023]
Abstract
Gelation processes grant access to a wealth of soft materials with tailorable properties, in applications as diverse as environmental remediation, biomedicine and electronics. Several classes of self-assembling gelators have been studied and employ non-covalent bonds to direct assembly, but recently attention has come to focus on how the overall shape of the gelator molecule impacts its gelation. Here we study a new sub-family of low molecular weight organogelators and explore how steric rearrangement influences their gelation. The gels produced are characterised with X-ray diffraction and small-angle neutron scattering (SANS) to probe their ex situ and in situ gelation mechanisms. The best examples were then tested for environmental remediation applications, gelling petrol and oils in the presence of water and salts.
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Affiliation(s)
- William J. Peveler
- Division of Biomedical Engineering
, School of Engineering
, University of Glasgow
, Rankine Building
,
Glasgow G12 8LT
, UK
.
| | - Hollie Packman
- Department of Earth Science and Engineering
, South Kensington Campus, Imperial College
,
London
, SW7 2AZ
, UK
| | - Shirin Alexander
- Energy Safety Research Institute (ESRI)
, Swansea University
, New Bay Campus
,
Swansea
, SA1 8EN
, Wales
, UK
| | - Raamanand R. Chauhan
- Department of Chemistry
, Physical and Theoretical Chemistry Laboratory
, University of Oxford
,
South Parks Road
, Oxford
, OX1 3QZ
, UK
| | - Lilian M. Hayes
- Department of Chemistry
, University College London
,
20 Gordon Street
, London
, WC1H 0AJ
, UK
| | - Thomas J. Macdonald
- Department of Chemistry
, University College London
,
20 Gordon Street
, London
, WC1H 0AJ
, UK
| | - Jeremy K. Cockcroft
- Department of Chemistry
, University College London
,
20 Gordon Street
, London
, WC1H 0AJ
, UK
| | - Sarah Rogers
- ISIS-STFC
, Rutherford Appleton Laboratory
,
Chilton
, Oxon OX11 0QX
, UK
| | - Dirk G. A. L. Aarts
- Department of Chemistry
, Physical and Theoretical Chemistry Laboratory
, University of Oxford
,
South Parks Road
, Oxford
, OX1 3QZ
, UK
| | - Claire J. Carmalt
- Department of Chemistry
, University College London
,
20 Gordon Street
, London
, WC1H 0AJ
, UK
| | - Ivan P. Parkin
- Department of Chemistry
, University College London
,
20 Gordon Street
, London
, WC1H 0AJ
, UK
| | - Joseph C. Bear
- Department of Chemical and Pharmaceutical Sciences
, Kingston University
, Kingston upon Thames
,
Surrey
, KT1 2EE
, UK
.
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8
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Tómasson DA, Ghosh D, Kržišnik Z, Fasolin LH, Vicente AA, Martin AD, Thordarson P, Damodaran KK. Enhanced Mechanical and Thermal Strength in Mixed-Enantiomers-Based Supramolecular Gel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12957-12967. [PMID: 30272986 DOI: 10.1021/acs.langmuir.8b02729] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Mixing supramolecular gels based on enantiomers leads to re-arrangement of gel fibers at the molecular level, which results in more favorable packing and tunable properties. Bis(urea) compounds tagged with a phenylalanine methyl ester in racemic and enantiopure forms were synthesized. Both enantiopure and racemate compounds formed gels in a wide range of solvents and the racemate (1-rac) formed a stronger gel network compared with the enantiomers. The gel (1R+1S) obtained by mixing equimolar amount of enantiomers (1R and 1S) showed enhanced mechanical and thermal stability compared to enantiomers and racemate gels. The preservation of chirality in these compounds was analyzed by circular dichroism and optical rotation measurements. Analysis of the scanning electron microscopy (SEM) and atomic force microscopy (AFM) images revealed that the network in the mixed gel is a combination of enantiomers and racemate fibers, which was further supported by solid-state NMR. The analysis of the packing in xerogels by solid-state NMR spectra and the existence of twisted-tape morphology in SEM and AFM images confirmed the presence of both self-sorted and co-assembled fibers in mixed gel. The enhanced thermal and mechanical strength may be attributed to the enhanced intermolecular forces between the racemate and the enantiomer and the combination of both self-sorted and co-assembled enantiomers in the mixed gel.
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Affiliation(s)
- Daníel Arnar Tómasson
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
| | - Dipankar Ghosh
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
| | - Zala Kržišnik
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
| | - Luiz Henrique Fasolin
- Centre of Biological Engineering , University of Minho , Campus de Gualtar , 4710-057 Braga , Portugal
| | - António A Vicente
- Centre of Biological Engineering , University of Minho , Campus de Gualtar , 4710-057 Braga , Portugal
| | - Adam D Martin
- School of Chemistry, The Australian Centre for Nanomedicine and the ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , University of New South Wales , Sydney 2052 , Australia
| | - Pall Thordarson
- School of Chemistry, The Australian Centre for Nanomedicine and the ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , University of New South Wales , Sydney 2052 , Australia
| | - Krishna K Damodaran
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
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9
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Min JH, Patel M, Koh WG. Incorporation of Conductive Materials into Hydrogels for Tissue Engineering Applications. Polymers (Basel) 2018; 10:E1078. [PMID: 30961003 PMCID: PMC6404001 DOI: 10.3390/polym10101078] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/13/2018] [Accepted: 09/26/2018] [Indexed: 02/07/2023] Open
Abstract
In the field of tissue engineering, conductive hydrogels have been the most effective biomaterials to mimic the biological and electrical properties of tissues in the human body. The main advantages of conductive hydrogels include not only their physical properties but also their adequate electrical properties, which provide electrical signals to cells efficiently. However, when introducing a conductive material into a non-conductive hydrogel, a conflicting relationship between the electrical and mechanical properties may develop. This review examines the strengths and weaknesses of the generation of conductive hydrogels using various conductive materials such as metal nanoparticles, carbons, and conductive polymers. The fabrication method of blending, coating, and in situ polymerization is also added. Furthermore, the applications of conductive hydrogel in cardiac tissue engineering, nerve tissue engineering, and bone tissue engineering and skin regeneration are discussed in detail.
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Affiliation(s)
- Ji Hong Min
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Korea.
- Active Polymer Center for Pattern Integration (APCPI), Yonsei-ro 50, Seoul 03722, Korea.
| | - Madhumita Patel
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Korea.
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Korea.
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10
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Alejo T, Andreu V, Mendoza G, Sebastian V, Arruebo M. Controlled release of bupivacaine using hybrid thermoresponsive nanoparticles activated via photothermal heating. J Colloid Interface Sci 2018; 523:234-244. [DOI: 10.1016/j.jcis.2018.03.107] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 03/28/2018] [Accepted: 03/29/2018] [Indexed: 12/18/2022]
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11
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Gao Y, Hao J, Yan Q, Du F, Ju Y, Hu J. Natural Triterpenoid-Tailored Phosphate: In Situ Reduction of Heavy Metals Spontaneously to Generate Electrochemical Hybrid Gels. ACS APPLIED MATERIALS & INTERFACES 2018; 10:17352-17358. [PMID: 29722960 DOI: 10.1021/acsami.8b03569] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this work, we reported a biocompatible nature product-based soft material which could convert heavy metals to nanoparticles (NPs) in situ spontaneously in a simple step. We have designed and synthesized a natural triterpenoid-tailored phosphate (methyl glycyrrhetate phosphate (MGP)), and this amphiphilic MGP could form the stable hydrogel and extract gold salt from water, followed by spontaneous in situ AuNP formation without external reductants. Notably, the AuNPs were mainly localized on nanofibers instead of gel cavities, and the resulting MGP-AuNPs hybrid gel exhibited attractive electrocatalytic and conductive properties. In addition, as an efficient leaching extraction agent, MGP hydrogel showed higher affinity toward heavy metals over other common metals on account of the high reduction potential of heavy metals. Our work not only provides a novel yet simple way in generating electrochemical hybrid gels by in situ reduction of heavy metals spontaneously but also expands the application of nature product-based functional materials.
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Affiliation(s)
- Yuxia Gao
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
- Department of Applied Chemistry, College of Science , China Agricultural University , Beijing 100193 , China
| | - Jie Hao
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Ministry of Education, Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Qiang Yan
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science , Fudan University , Shanghai 200433 , China
| | - Fengpei Du
- Department of Applied Chemistry, College of Science , China Agricultural University , Beijing 100193 , China
| | - Yong Ju
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Ministry of Education, Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Jun Hu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science , Fudan University , Shanghai 200433 , China
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Ganguly S, Ray D, Das P, Maity PP, Mondal S, Aswal VK, Dhara S, Das NC. Mechanically robust dual responsive water dispersible-graphene based conductive elastomeric hydrogel for tunable pulsatile drug release. ULTRASONICS SONOCHEMISTRY 2018; 42:212-227. [PMID: 29429663 DOI: 10.1016/j.ultsonch.2017.11.028] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/20/2017] [Accepted: 11/20/2017] [Indexed: 06/08/2023]
Abstract
Nanohybrid hydrogels based on pristine graphene with enhanced toughness and dual responsive drug delivery feature is opening a new era for smart materials. Here pristine graphene hydrogels are synthesized by in situ free radical polymerization where graphene platelets are the nanobuiliding blocks to withstand external stress and shows reversible ductility. Such uniqueness is a mere reflection of rubber-like elasticity on the hydrogels. These nanobuilding blocks serve also the extensive physisorption which enhances the physical crosslinking inside the gel matrix. Besides the pH-responsive drug release features, these hydrogels are also implemented as a pulsatile drug delivery device. The electric responsive drug release behaviours are noticed and hypothesized by the formation of conducting network in the polyelectrolytic hydrogel matrix. The hydrogels are also tested as good biocompatibility and feasible cell-attachment during live-dead cell adhesion study. The drug release characteristics can also be tuned by adjusting the conducting filler loading into the gel matrix. As of our knowledge, this type of hydrogels with rubber-like consistency, high mechanical property, tunable and dual responsive drug delivery feature and very good human cell compatible is the first to report.
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Affiliation(s)
- Sayan Ganguly
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
| | - Debes Ray
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Poushali Das
- School of Nanoscience and Technology, Indian Institute of Technology, Kharagpur 721302, India
| | - Priti Prasanna Maity
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Subhadip Mondal
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Santanu Dhara
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Narayan Ch Das
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India; School of Nanoscience and Technology, Indian Institute of Technology, Kharagpur 721302, India.
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13
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Rizzo C, Arcudi F, Đorđević L, Dintcheva NT, Noto R, D'Anna F, Prato M. Nitrogen-Doped Carbon Nanodots-Ionogels: Preparation, Characterization, and Radical Scavenging Activity. ACS NANO 2018; 12:1296-1305. [PMID: 29283554 DOI: 10.1021/acsnano.7b07529] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hybrid diimidazolium-based ionogels were obtained by dispersing nitrogen-doped carbon nanodots (NCNDs) in ionic liquid (IL) solutions and by using dicationic organic salts as gelators. The properties of the NCND-ionogels were studied in terms of thermal stability, mechanical strength, morphology, rheological, and microscopic analyses. Insights into the formation of the hybrid soft material were attained from kinetics of sol-gel phase transition and from estimating the size of the aggregates, obtained from opacity and resonance light-scattering measurements. We demonstrate that, on one hand, NCNDs were able to favor the gel formation both in the presence of gelating and nongelating ILs. On the other hand, the gelatinous matrix retains and, in some cases, improves the properties of NCNDs. The NCND-ionogels showed the typical fluorescence emission of the carbon dots and a notable antiradical activity, with higher efficiency as compared to the single components. The presented hybrid materials hold great promise for topical applications in antioxidant fields.
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Affiliation(s)
- Carla Rizzo
- Dipartimento STEBICEF-Sezione di Chimica, Università degli Studi di Palermo , Viale delle Scienze Ed. 17, 90128 Palermo, Italy
| | - Francesca Arcudi
- Dipartimento di Scienze Chimiche e Farmaceutiche, INSTM UdR Trieste, Università degli Studi di Trieste , Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Luka Đorđević
- Dipartimento di Scienze Chimiche e Farmaceutiche, INSTM UdR Trieste, Università degli Studi di Trieste , Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Nadka Tzankova Dintcheva
- Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università degli Studi di Palermo , Viale delle Scienze Ed. 8, 90128 Palermo, Italy
| | - Renato Noto
- Dipartimento STEBICEF-Sezione di Chimica, Università degli Studi di Palermo , Viale delle Scienze Ed. 17, 90128 Palermo, Italy
| | - Francesca D'Anna
- Dipartimento STEBICEF-Sezione di Chimica, Università degli Studi di Palermo , Viale delle Scienze Ed. 17, 90128 Palermo, Italy
| | - Maurizio Prato
- Dipartimento di Scienze Chimiche e Farmaceutiche, INSTM UdR Trieste, Università degli Studi di Trieste , Via Licio Giorgieri 1, 34127 Trieste, Italy
- Carbon Nanobiotechnology Laboratory CIC biomaGUNE , Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain
- Basque Fdn Sci Ikerbasque , Bilbao, Spain
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14
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Li H, Men D, Sun Y, Zhang T, Hang L, Liu D, Li C, Cai W, Li Y. Optical sensing properties of Au nanoparticle/hydrogel composite microbeads using droplet microfluidics. NANOTECHNOLOGY 2017; 28:405502. [PMID: 28770810 DOI: 10.1088/1361-6528/aa83c2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Uniform Au nanoparticle (NP)/poly (acrylamide-co-acrylic acid) [P(AAm-co-AA)] hydrogel microbeads were successfully prepared using droplet microfluidics technology. The microbeads exhibited a good stimuli-responsive behavior to pH value. Particularly in the pH value ranging from pH 2-pH 9, the composite microbead sizes gradually increased along with the increase of pH value. The homogeneous Au NPs, which were encapsulated in the P(AAm-co-AA) hydrogel microbeads, could transform the volume changes of hydrogel into optical signals by a tested single microbead with a microspectrometre system. The glucose was translated into gluconic acid by glucose oxidase. Thus, the Au NP/P(AAm-co-AA) hydrogel microbeads were used for detecting glucose based on pH effects on the composite microbeads. For this, the single Au NP/P(AAm-co-AA) hydrogel microbead could act as a good pH- or glucose-visualizing sensor.
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Affiliation(s)
- Huilin Li
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China. University of Science and Technology of China, Hefei 230026, People's Republic of China
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15
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Liang C, Kulchat S, Jiang S, Lehn JM. Gelation-driven selection in dynamic covalent C 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 C/CN exchange. Chem Sci 2017; 8:6822-6828. [PMID: 29147507 PMCID: PMC5643956 DOI: 10.1039/c7sc02827j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 08/15/2017] [Indexed: 12/12/2022] Open
Abstract
Gelation-driven amplification of an optimal gel-forming constituent is demonstrated for dynamic covalent libraries based on CC/CN exchange, through selection of the components leading to the most stable gel.
Knoevenagel barbiturate derivatives bearing long alkyl chains were proven to form organogels in suitable solvents based on supramolecular interactions. Their reaction with imines allows for component exchange through CC/CN recombination. The effect of various parameters (solvents, chain length, and temperature) on the CC/CN exchange reaction has been studied. Mixing Knoevenagel compound K and imine I-16 in a 1 : 1 ratio generated a constitutional dynamic library containing the four constituents K, I-16, K′-16, and I′. The reversible exchange reaction was monitored by 1H-NMR, showing marked changes in the fractions of the four constituents on sol–gel interconversion as a function of temperature. The library composition changed from statistical distribution of the four constituents in the sol state to selective amplification of the gel forming K′-16 constituent together with that of its agonist I′. The process amounts to self-organization driven component selection in a constitutional dynamic organogel system undergoing gelation. This process displays up-regulation of the gel-forming constituent by component redistribution through reversible covalent connections.
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Affiliation(s)
- Chunshuang Liang
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) , Université de Strasbourg , 8 allée Gaspard Monge , Strasbourg 67000 , France . .,State Key Laboratory of Supramolecular Structure and Materials , College of Chemistry , Jilin University , 2699 Qianjin Avenue , Changchun 130012 , P. R. China
| | - Sirinan Kulchat
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) , Université de Strasbourg , 8 allée Gaspard Monge , Strasbourg 67000 , France . .,Materials Chemistry Research Unit , Department of Chemistry and Center of Excellence for Innovation in Chemistry , Faculty of Science , Khon Kaen University , Khon Kaen 40002 , Thailand
| | - Shimei Jiang
- State Key Laboratory of Supramolecular Structure and Materials , College of Chemistry , Jilin University , 2699 Qianjin Avenue , Changchun 130012 , P. R. China.,International Center of Future Science , Jilin University , Changchun 130012 , China
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) , Université de Strasbourg , 8 allée Gaspard Monge , Strasbourg 67000 , France .
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16
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Su T, Hong KH, Zhang W, Li F, Li Q, Yu F, Luo G, Gao H, He YP. Scaleable two-component gelator from phthalic acid derivatives and primary alkyl amines: acid-base interaction in the cooperative assembly. SOFT MATTER 2017; 13:4066-4073. [PMID: 28536712 DOI: 10.1039/c7sm00797c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A series of phthalic acid derivatives (P) with a carbon-chain tail was designed and synthesized as single-component gelators. A combination of the single-component gelator P and a non-gelling additive n-alkylamine A through acid-base interaction brought about a series of novel phase-selective two-component gelators PA. The gelation capabilities of P and PA, and the structural, morphological, thermo-dynamic and rheological properties of the corresponding gels were investigated. A molecular dynamics simulation showed that the H-bonding network in PA formed between the NH of A and the carbonyl oxygen of P altered the assembly process of gelator P. Crude PA could be synthesized through a one-step process without any purification and could selectively gel the oil phase without a typical heating-cooling process. Moreover, such a crude PA and its gelation process could be amplified to the kilogram scale with high efficiency, which offers a practical economically viable solution to marine oil-spill recovery.
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Affiliation(s)
- Ting Su
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Dandong Lu West 1, Fushun 113001, Liaoning, P. R. China.
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17
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Yu P, Bao RY, Shi XJ, Yang W, Yang MB. Self-assembled high-strength hydroxyapatite/graphene oxide/chitosan composite hydrogel for bone tissue engineering. Carbohydr Polym 2016; 155:507-515. [PMID: 27702542 DOI: 10.1016/j.carbpol.2016.09.001] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 08/23/2016] [Accepted: 09/01/2016] [Indexed: 02/05/2023]
Abstract
Graphene hydrogel has shown greatly potentials in bone tissue engineering recently, but it is relatively weak in the practical use. Here we report a facile method to synthesize high strength composite graphene hydrogel. Graphene oxide (GO), hydroxyapatite (HA) nanoparticles (NPs) and chitosan (CS) self-assemble into a 3-dimensional hydrogel with the assistance of crosslinking agent genipin (GNP) for CS and reducing agent sodium ascorbate (NaVC) for GO simultaneously. The dense and oriented microstructure of the resulted composite gel endows it with high mechanical strength, high fixing capacity of HA and high porosity. These properties together with the good biocompatibility make the ternary composite gel a promising material for bone tissue engineering. Such a simultaneous crosslinking and reduction strategy can also be applied to produce a variety of 3D graphene-polymer based nanocomposites for biomaterials, energy storage materials and adsorbent materials.
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Affiliation(s)
- Peng Yu
- College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu, 610065 Sichuan, China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu, 610065 Sichuan, China
| | - Xiao-Jun Shi
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan, China.
| | - Wei Yang
- College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu, 610065 Sichuan, China.
| | - Ming-Bo Yang
- College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu, 610065 Sichuan, China
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18
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Bhattacharya S, Samanta SK. Soft-Nanocomposites of Nanoparticles and Nanocarbons with Supramolecular and Polymer Gels and Their Applications. Chem Rev 2016; 116:11967-12028. [DOI: 10.1021/acs.chemrev.6b00221] [Citation(s) in RCA: 219] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Santanu Bhattacharya
- Department
of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
- Director’s
Research Unit, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Suman K. Samanta
- Director’s
Research Unit, Indian Association for the Cultivation of Science, Kolkata 700032, India
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19
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Bhattacharjee S, Bhattacharya S. Remarkable Role of C-I···N Halogen Bonding in Thixotropic 'Halo'gel Formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4270-4277. [PMID: 26422750 DOI: 10.1021/acs.langmuir.5b02597] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Halogen-bonding-induced self-assembly in the solution of equimolar mixtures of certain pyridyl-ended oligo p-phenylenevinylene (OPV)-derivatives with 1,4-diiodotetrafluorobenzene is reported. The mode of self-assembly, that is, cocrystallization, thixotropic gelation, or precipitation, depends strongly on the nature of chains (n-alkyl chains as a function of length or short oxyethylene chain) appended to the OPV-backbone as well as on the cooling rate of the corresponding hot solution. Single-crystal X-ray diffraction studies of the cocrystals reveal the "infinite" chain formation via C-I···N halogen-bonding interactions between the two components. In addition, multiple noncovalent interactions induce cross-links among these halogen-bonded "infinite" chains. Interestingly, the molecular packing in the "Cogel" bearing OPV-derivative with oxyethylene chains is found to be very similar to that of the cocrystal of the same.
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Affiliation(s)
| | - Santanu Bhattacharya
- Director's Research Unit, Indian Association for the Cultivation of Science, Kolkata 700032, India
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20
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Datta S, Bhattacharya S. Carbon-Nanotube-Mediated Electrochemical Transition in a Redox-Active Supramolecular Hydrogel Derived from Viologen and an l-Alanine-Based Amphiphile. Chemistry 2016; 22:7524-32. [PMID: 27059107 DOI: 10.1002/chem.201600214] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Indexed: 12/16/2022]
Abstract
A two-component hydrogelator (16-A)2 -V(2+) , comprising an l-alanine-based amphiphile (16-A) and a redox-active viologen based partner (V(2+) ), is reported. The formation the hydrogel depended, not only on the acid-to-amine stoichiometric ratio, but on the choice of the l-amino acid group and also on the hydrocarbon chain length of the amphiphilic component. The redox responsive property and the electrochemical behavior of this two-component system were further examined by step-wise chemical and electrochemical reduction of the viologen nucleus (V(2+) /V(+) and V(+) /V(0) ). The half-wave reduction potentials (E1/2 ) associated with the viologen ring shifted to more negative values with increasing amine component. This indicates that higher extent of salt formation hinders reduction of the viologen moiety. Interestingly, the incorporation of single-walled carbon nanotubes in the electrochemically irreversible hydrogel (16-A)2 -V(2+) transformed it into a quasi-reversible electrochemical system.
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Affiliation(s)
- Sougata Datta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, Karnataka, India.,Director's Research Unit (DRU), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India
| | - Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, Karnataka, India. .,Director's Research Unit (DRU), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India. .,Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560 064, Jakkur, India.
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21
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Kapil N, Singh A, Singh M, Das D. Efficient MoS2Exfoliation by Cross-β-Amyloid Nanotubes for Multistimuli-Responsive and Biodegradable Aqueous Dispersions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509953] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nidhi Kapil
- Institute of Nano Science and Technology, Phase 10; Mohali 160062 India
| | - Ashmeet Singh
- Institute of Nano Science and Technology, Phase 10; Mohali 160062 India
| | - Manish Singh
- Institute of Nano Science and Technology, Phase 10; Mohali 160062 India
| | - Dibyendu Das
- Indian Institute of Science Education and Research (IISER) Tirupati; Andhra Pradesh 517507 India
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22
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Kapil N, Singh A, Singh M, Das D. Efficient MoS2Exfoliation by Cross-β-Amyloid Nanotubes for Multistimuli-Responsive and Biodegradable Aqueous Dispersions. Angew Chem Int Ed Engl 2016; 55:7772-6. [DOI: 10.1002/anie.201509953] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Revised: 01/03/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Nidhi Kapil
- Institute of Nano Science and Technology, Phase 10; Mohali 160062 India
| | - Ashmeet Singh
- Institute of Nano Science and Technology, Phase 10; Mohali 160062 India
| | - Manish Singh
- Institute of Nano Science and Technology, Phase 10; Mohali 160062 India
| | - Dibyendu Das
- Indian Institute of Science Education and Research (IISER) Tirupati; Andhra Pradesh 517507 India
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23
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Liu Y, Liang CL, Wu JJ, Bao RY, Qi GQ, Wang Y, Yang W, Xie BH, Yang MB. Solvent-controlled formation of a reduced graphite oxide gel via hydrogen bonding. RSC Adv 2016. [DOI: 10.1039/c6ra02942f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydrogen bonding between solvent molecules and the oxygen-containing functional groups on rGO sheets is vital to achieve high-performance rGO gels.
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Affiliation(s)
- Yang Liu
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Cheng-Lu Liang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Jing-jie Wu
- Department of Materials Science and NanoEngineering
- Rice University
- Houston
- USA
| | - Rui-Ying Bao
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Guo-Qiang Qi
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Yu Wang
- School of Mechanical and Materials Engineering
- Washington State University
- Pullman
- USA
| | - Wei Yang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Bang-Hu Xie
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
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24
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Okesola BO, Suravaram SK, Parkin A, Smith DK. Selective Extraction and In Situ Reduction of Precious Metal Salts from Model Waste To Generate Hybrid Gels with Embedded Electrocatalytic Nanoparticles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507684] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Okesola BO, Suravaram SK, Parkin A, Smith DK. Selective Extraction and In Situ Reduction of Precious Metal Salts from Model Waste To Generate Hybrid Gels with Embedded Electrocatalytic Nanoparticles. Angew Chem Int Ed Engl 2015; 55:183-7. [PMID: 26549625 DOI: 10.1002/anie.201507684] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/13/2015] [Indexed: 11/08/2022]
Abstract
A hydrogel based on 1,3:2,4-dibenzylidenesorbitol (DBS), modified with acyl hydrazides which extracts gold/silver salts from model waste is reported, with preferential uptake of precious heavy metals over other common metals. Reduction of gold/silver salts occurs spontaneously in the gel to yield metal nanoparticles located on the gel nanofibers. High nanoparticle loadings can be achieved, endowing the gel with electrochemical activity. These hybrid gels exhibit higher conductances than gels doped with carbon nanotubes, and can be used to modify electrode surfaces, enhancing electrocatalysis. We reason this simple, industrially and environmentally relevant approach to conducting materials is of considerable significance.
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Affiliation(s)
- Babatunde O Okesola
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK)
| | - Sindhu K Suravaram
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK)
| | - Alison Parkin
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK)
| | - David K Smith
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK).
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26
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Datta S, Bhattacharya S. Multifarious facets of sugar-derived molecular gels: molecular features, mechanisms of self-assembly and emerging applications. Chem Soc Rev 2015; 44:5596-637. [PMID: 26023922 DOI: 10.1039/c5cs00093a] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The remarkable capability of nature to design and create excellent self-assembled nano-structures, especially in the biological world, has motivated chemists to mimic such systems with synthetic molecular and supramolecular systems. The hierarchically organized self-assembly of low molecular weight gelators (LMWGs) based on non-covalent interactions has been proven to be a useful tool in the development of well-defined nanostructures. Among these, the self-assembly of sugar-derived LMWGs has received immense attention because of their propensity to furnish biocompatible, hierarchical, supramolecular architectures that are macroscopically expressed in gel formation. This review sheds light on various aspects of sugar-derived LMWGs, uncovering their mechanisms of gelation, structural analysis, and tailorable properties, and their diverse applications such as stimuli-responsiveness, sensing, self-healing, environmental problems, and nano and biomaterials synthesis.
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Affiliation(s)
- Sougata Datta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, India.
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27
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Cayuela A, Kennedy SR, Soriano ML, Jones CD, Valcárcel M, Steed JW. Fluorescent carbon dot-molecular salt hydrogels. Chem Sci 2015; 6:6139-6146. [PMID: 30090229 PMCID: PMC6055089 DOI: 10.1039/c5sc01859e] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 07/29/2015] [Indexed: 11/21/2022] Open
Abstract
We report the incorporation of functionalised carbon nanodots within a low molecular weight salt hydrogel enhancing the gelation and fluorescence properties of both the gel and carbon nanomaterial.
The incorporation of functionalised carbon nanodots within a novel low molecular weight salt hydrogel derived from 5-aminosalicylic acid is reported. The carbon dots result in markedly enhanced gelation properties, while inclusion within the hydrophobic gel results in a dramatic fluorescence enhancement for the carbon nanomaterials. The resulting hybrid CD gels exhibit a useful sensor response for heavy metal ions, particularly Pb2+.
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Affiliation(s)
- Angelina Cayuela
- Department of Analytical Chemistry , Marie Curie Building , Campus de Rabanales , University of Córdoba , E-14071 Córdoba , Spain . ; Tel: +34 957 218616
| | - Stuart R Kennedy
- Department of Chemistry , University of Durham , South Road , DH1 3LE , UK . ; ; Tel: +44 (0)191 334 2085
| | - M Laura Soriano
- Department of Analytical Chemistry , Marie Curie Building , Campus de Rabanales , University of Córdoba , E-14071 Córdoba , Spain . ; Tel: +34 957 218616
| | - Christopher D Jones
- Department of Chemistry , University of Durham , South Road , DH1 3LE , UK . ; ; Tel: +44 (0)191 334 2085
| | - Miguel Valcárcel
- Department of Analytical Chemistry , Marie Curie Building , Campus de Rabanales , University of Córdoba , E-14071 Córdoba , Spain . ; Tel: +34 957 218616
| | - Jonathan W Steed
- Department of Chemistry , University of Durham , South Road , DH1 3LE , UK . ; ; Tel: +44 (0)191 334 2085
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28
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Bhattacharjee S, Samanta SK, Moitra P, Pramoda K, Kumar R, Bhattacharya S, Rao CNR. Nanocomposite Made of an Oligo(p-phenylenevinylene)-Based Trihybrid Thixotropic Metallo(organo)gel Comprising Nanoscale Metal-Organic Particles, Carbon Nanohorns, and Silver Nanoparticles. Chemistry 2015; 21:5467-76. [DOI: 10.1002/chem.201405522] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Indexed: 01/23/2023]
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29
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Song F, Hu W, Xiao L, Cao Z, Li X, Zhang C, Liao L, Liu L. Enzymatically cross-linked hyaluronic acid/graphene oxide nanocomposite hydrogel with pH-responsive release. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:339-52. [PMID: 25598448 DOI: 10.1080/09205063.2015.1007413] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Hyaluronic acid (HA) is made up of repeating disaccharide units (β-1,4-d-glucuronic acid and β-1,3-N-acetyl-d-glucosamine) and is a major constituent of the extracellular matrix. HA and its derivatives which possess excellent biocompatibility and physiochemical properties have been studied in drug delivery and tissue engineering applications. Tyramine-based HA hydrogel with good compatibility to cell and tissue has been reported recently. However, inferior mechanical property may limit the biomedical application of the HA hydrogel. In this study, HA/graphene oxide (GO) nanocomposite (NC) hydrogel was prepared through a horseradish peroxidase catalyzed in situ cross-linking process. As compared with pure HA hydrogels, incorporation of GO to the HA matrix could significantly enhance the mechanical properties (storage moduli 1800 Pa) of the hydrogel and prolong the release of rhodamine B (RB) as the model drug from the hydrogel (33 h) as well. In addition, due to the multiple interactions between GO and RB, the NC hydrogels showed excellent pH-responsive release behavior. The release of RB from the NC hydrogel was prolonged at low pH (pH 4.0) in the presence of GO, which could be attributed to the enhanced interactions between GO and HA as well as with RB. In situ three-dimensional encapsulation of mouse embryonic fibroblasts (BALB 3T3 cells) in the NC hydrogels and cytotoxicity results indicated the cytocompatibility of both the enzymatic cross-linking process and HA/GO NC hydrogels (cell viability 90.6 ± 4.25%). The enzymatically catalyzed fabrication of NC hydrogels proved to be an easy and mild approach, and had great potential in the construction of both tissue engineering scaffolds and stimuli-responsive drug release matrices.
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Affiliation(s)
- Fangfang Song
- a College of Chemistry and Molecular Science , Wuhan University , Wuhan, Hubei 430072 , P.R. China
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30
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Thoniyot P, Tan MJ, Karim AA, Young DJ, Loh XJ. Nanoparticle-Hydrogel Composites: Concept, Design, and Applications of These Promising, Multi-Functional Materials. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2015; 2:1400010. [PMID: 27980900 PMCID: PMC5115280 DOI: 10.1002/advs.201400010] [Citation(s) in RCA: 410] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Indexed: 05/19/2023]
Abstract
New technologies rely on the development of new materials, and these may simply be the innovative combination of known components. The structural combination of a polymer hydrogel network with a nanoparticle (metals, non-metals, metal oxides, and polymeric moieties) holds the promise of providing superior functionality to the composite material with applications in diverse fields, including catalysis, electronics, bio-sensing, drug delivery, nano-medicine, and environmental remediation. This mixing may result in a synergistic property enhancement of each component: for example, the mechanical strength of the hydrogel and concomitantly decrease aggregation of the nanoparticles. These mutual benefits and the associated potential applications have seen a surge of interest in the past decade from multi-disciplinary research groups. Recent advances in nanoparticle-hydrogel composites are herein reviewed with a focus on their synthesis, design, potential applications, and the inherent challenges accompanying these exciting materials.
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Affiliation(s)
- Praveen Thoniyot
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore
| | - Mein Jin Tan
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore
| | - Anis Abdul Karim
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore
| | - David James Young
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore; School of Science Monash University Malaysia Bandar Sunway 47500 Malaysia
| | - Xian Jun Loh
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore; Department of Materials Science and Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117576 Singapore
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31
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Yadav P, Ballabh A. Odd–even effect in a thiazole based organogelator: understanding the interplay of non-covalent interactions on property and applications. NEW J CHEM 2015. [DOI: 10.1039/c4nj01247j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of systematic change in the alkyl chain appended to the thiazole moiety on supramolecular gelation and nanoparticle synthesis were investigated.
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Affiliation(s)
- Priyanka Yadav
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390002
- India
| | - Amar Ballabh
- Department of Chemistry
- Faculty of Science
- The Maharaja Sayajirao University of Baroda
- Vadodara 390002
- India
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32
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Vazhayal L, Kumar Sasidharan N, Talasila S, Kumar DBS, Solaiappan A. Supramolecular association of 2D alumino-siloxane aquagel building blocks to 3D porous cages and its efficacy for topical and injectable delivery of fluconazole, an antifungal drug. J Mater Chem B 2015; 3:5978-5990. [DOI: 10.1039/c5tb00625b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fascinating 2D architecture of an alumino-siloxane gel self-assembled into a well-defined 3D porous aquagel cage. It is identified to be an excellently mechanically stable, injectable and non-cytotoxic medium for drug delivery applications.
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Affiliation(s)
- Linsha Vazhayal
- Functional Materials Section
- Materials Science and Technology Division
- Council of Scientific and Industrial Research-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Thiruvananthapuram-695019
- India
| | - Nishanth Kumar Sasidharan
- Agroprocessing and Natural Products Division
- Council of Scientific and Industrial Research-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Thiruvananthapuram-695019
- India
| | - Sindhoor Talasila
- K. M. College of Pharmacy
- Department of Pharmaceutics
- Madurai-625107
- India
| | - Dileep B. S. Kumar
- Agroprocessing and Natural Products Division
- Council of Scientific and Industrial Research-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Thiruvananthapuram-695019
- India
| | - Ananthakumar Solaiappan
- Functional Materials Section
- Materials Science and Technology Division
- Council of Scientific and Industrial Research-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Thiruvananthapuram-695019
- India
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33
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Zhang Y, Ding H, Wu Y, Zhang C, Bai B, Wang H, Li M. Ultrasound-induced controllable morphology and growth dimension in a dihydrazide-based self-assembly system. SOFT MATTER 2014; 10:8838-8845. [PMID: 25283797 DOI: 10.1039/c4sm01331j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have demonstrated ultrasound-induced organogels based on twin-tapered dihydrazide derivatives, oxalyl acid N,N-di(3,4,5-trialkoxybenzoyl)hydrazide (FH-Tn). Ultrasound irradiation has been proved to influence gel properties at micro-levels. Different self-assembled structures from entangled fibers to tube-like structures and nanoparticles can be easily manipulated by tuning irradiation time and water bath temperature. FT-IR spectra exhibit weakened hydrogen bonding interactions, and XRD studies showed different packing modes before and after sonication. In addition, ultrasound can have effects on gel properties at macro-levels. Gels obtained from ultrasound treatment possess different wetting properties, relatively worse rheological properties and thermo-stability. Kinetic studies based on dynamic fluorescence spectra, rheological studies and theoretical calculations suggest that molecular aggregation mode differed from one-dimension to two-dimension for the gel after sonication.
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Affiliation(s)
- Yan Zhang
- Key Laboratory for Automobile Materials (JLU), Ministry of Education, College of Materials Science and Engineering, Jilin University, 130012, Changchun, P. R. China.
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34
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Biswas A, Banerjee A. Tailored Synthesis of Various Nanomaterials by Using a Graphene-Oxide-Based Gel as a Nanoreactor and Nanohybrid-Catalyzed CC Bond Formation. Chem Asian J 2014; 9:3451-6. [DOI: 10.1002/asia.201402695] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Indexed: 11/06/2022]
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35
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Mandal SK, Brahmachari S, Das PK. In Situ Synthesised Silver Nanoparticle-InfusedL-Lysine-Based Injectable Hydrogel: Development of a Biocompatible, Antibacterial, Soft Nanocomposite. Chempluschem 2014. [DOI: 10.1002/cplu.201402269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Wu NW, Zhang J, Xu XD, Yang HB. Design and preparation of ethynyl-pyrene modified platinum–acetylide gelators and their application in dispersion of graphene. Chem Commun (Camb) 2014; 50:10269-72. [DOI: 10.1039/c4cc04039b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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37
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Maji B, Samanta SK, Bhattacharya S. Role of pH controlled DNA secondary structures in the reversible dispersion/precipitation and separation of metallic and semiconducting single-walled carbon nanotubes. NANOSCALE 2014; 6:3721-3730. [PMID: 24569668 DOI: 10.1039/c3nr05045a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Single-stranded DNA (ss-DNA) oligomers (dA20, d[(C3TA2)3C3] or dT20) are able to disperse single-walled carbon nanotubes (SWNTs) in water at pH 7 through non-covalent wrapping on the nanotube surface. At lower pH, an alteration of the DNA secondary structure leads to precipitation of the SWNTs from the dispersion. The structural change of dA20 takes place from the single-stranded to the A-motif form at pH 3.5 while in case of d[(C3TA2)3C3] the change occurs from the single-stranded to the i-motif form at pH 5. Due to this structural change, the DNA is no longer able to bind the nanotube and hence the SWNT precipitates from its well-dispersed state. However, this could be reversed on restoring the pH to 7, where the DNA again relaxes in the single-stranded form. In this way the dispersion and precipitation process could be repeated over and over again. Variable temperature UV-Vis-NIR and CD spectroscopy studies showed that the DNA-SWNT complexes were thermally stable even at ∼90 °C at pH 7. Broadband NIR laser (1064 nm) irradiation also demonstrated the stability of the DNA-SWNT complex against local heating introduced through excitation of the carbon nanotubes. Electrophoretic mobility shift assay confirmed the formation of a stable DNA-SWNT complex at pH 7 and also the generation of DNA secondary structures (A/i-motif) upon acidification. The interactions of ss-DNA with SWNTs cause debundling of the nanotubes from its assembly. Selective affinity of the semiconducting SWNTs towards DNA than the metallic ones enables separation of the two as evident from spectroscopic as well as electrical conductivity studies.
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Affiliation(s)
- Basudeb Maji
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India.
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38
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Babu SS, Praveen VK, Ajayaghosh A. Functional π-gelators and their applications. Chem Rev 2014; 114:1973-2129. [PMID: 24400783 DOI: 10.1021/cr400195e] [Citation(s) in RCA: 1220] [Impact Index Per Article: 122.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sukumaran Santhosh Babu
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) , Trivandrum 695019, India
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39
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Foster JA, Edkins RM, Cameron GJ, Colgin N, Fucke K, Ridgeway S, Crawford AG, Marder TB, Beeby A, Cobb SL, Steed JW. Blending gelators to tune gel structure and probe anion-induced disassembly. Chemistry 2014; 20:279-91. [PMID: 24302604 PMCID: PMC3994942 DOI: 10.1002/chem.201303153] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Indexed: 11/08/2022]
Abstract
Blending different low molecular weight gelators (LMWGs) provides a convenient route to tune the properties of a gel and incorporate functionalities such as fluorescence. Blending a series of gelators having a common bis-urea motif, and functionalised with different amino acid-derived end-groups and differing length alkylene spacers is reported. Fluorescent gelators incorporating 1- and 2-pyrenyl moieties provide a probe of the mixed systems alongside structural and morphological data from powder diffraction and electron microscopy. Characterisation of the individual gelators reveals that although the expected α-urea tape motif is preserved, there is considerable variation in the gelation properties, molecular packing, fibre morphology and rheological behaviour. Mixing of the gelators revealed examples in which: 1) the gels formed separate, orthogonal networks maintaining their own packing and morphology, 2) the gels blended together into a single network, either adopting the packing and morphology of one gelator, or 3) a new structure not seen for either of the gelators individually was created. The strong binding of the urea functionalities to anions was exploited as a means of breaking down the gel structure, and the use of fluorescent gel blends provides new insights into anion-mediated gel dissolution.
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Affiliation(s)
- Jonathan A Foster
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Robert M Edkins
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Gary J Cameron
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Neil Colgin
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Katharina Fucke
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Sam Ridgeway
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Andrew G Crawford
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg97074 Würzburg (Germany)
| | - Andrew Beeby
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Steven L Cobb
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Jonathan W Steed
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
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40
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Wang L, Xin X, Guo K, Yang M, Ma X, Yuan J, Shen J, Yuan S. Ordered carbon nanotubes–n-dodecyl tetraethylene monoether liquid crystal composites through phase separation induced by poly(ethylene glycol). Phys Chem Chem Phys 2014; 16:14771-80. [DOI: 10.1039/c4cp00622d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We used a phase separation method to incorporate carbon nanotubes into the lamellar phase of a surfactant.
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Affiliation(s)
- Lin Wang
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
| | - Xia Xin
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
- National Engineering Technology Research Center for Colloidal Materials
- Shandong University
| | - Kai Guo
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
| | - Mengzhou Yang
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
| | - Xin Ma
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
| | - Jing Yuan
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
| | - Jinglin Shen
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
| | - Shiling Yuan
- Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- Jinan, P. R. China
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41
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Peveler WJ, Bear JC, Southern P, Parkin IP. Organic–inorganic hybrid materials: nanoparticle containing organogels with myriad applications. Chem Commun (Camb) 2014; 50:14418-20. [DOI: 10.1039/c4cc05745g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Remouldable, recyclable, hybrid materials from a low molecular weight organogelator and nanomaterials have diverse practical applications.
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Affiliation(s)
- William J. Peveler
- Department of Security and Crime Science
- University College London
- London, UK
- Department of Chemistry
- University College London
| | - Joseph C. Bear
- Department of Chemistry
- University College London
- London, UK
| | - Paul Southern
- UCL Healthcare Biomagnetics Laboratories
- Royal Institution of Great Britain
- London, UK
| | - Ivan P. Parkin
- Department of Chemistry
- University College London
- London, UK
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42
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Mandal D, Kar T, Das PK. Pyrene-Based Fluorescent Ambidextrous Gelators: Scaffolds for Mechanically Robust SWNT-Gel Nanocomposites. Chemistry 2013; 20:1349-58. [DOI: 10.1002/chem.201303401] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 11/07/2013] [Indexed: 12/23/2022]
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43
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Sankar RM, Seeni Meera KM, Samanta D, Jithendra P, Mandal AB, Jaisankar SN. The pH-sensitive polyampholyte nanogels: Inclusion of carbon nanotubes for improved drug loading. Colloids Surf B Biointerfaces 2013; 112:120-7. [DOI: 10.1016/j.colsurfb.2013.07.046] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 07/21/2013] [Accepted: 07/23/2013] [Indexed: 01/06/2023]
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44
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Bhattacharjee S, Datta S, Bhattacharya S. Remarkable Regioisomer Control in the Hydrogel Formation from a Two‐Component Mixture of Pyridine‐End Oligo(
p
‐phenylenevinylene)s and
N
‐Decanoyl‐
L
‐alanine. Chemistry 2013; 19:16672-81. [DOI: 10.1002/chem.201302100] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 09/09/2013] [Indexed: 12/24/2022]
Affiliation(s)
- Subham Bhattacharjee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, Karnataka 560012 (India), Fax: (+91) 80‐23600529
| | - Sougata Datta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, Karnataka 560012 (India), Fax: (+91) 80‐23600529
| | - Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, Karnataka 560012 (India), Fax: (+91) 80‐23600529
- Honorary Professor, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Jakkur 560064 (India)
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45
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Das S, Irin F, Ma L, Bhattacharia SK, Hedden RC, Green MJ. Rheology and morphology of pristine graphene/polyacrylamide gels. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8633-40. [PMID: 23915342 DOI: 10.1021/am402185r] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Enhancement of toughness in nanomaterial-based hydrogels is a critical metric for many of their engineering applications. Pristine graphene-polyacrylamide (PAM) hydrogels are synthesized via in situ polymerization of acrylamide monomer in PAM-stabilized graphene dispersion. In-situ polymerization leads to the uniform dispersion of the graphene sheets in the hydrogel. The graphene sheets interact with the elastic chains of the hydrogel through physisorption and permit gelation in the absence of any chemical cross-linker. This study represents the first report of pristine graphene as a physical cross-linker in a hydrogel. The properties of the graphene-polymer hydrogel are characterized by rheological measurements and compressive tests, revealing an increase in the storage modulus and toughness of the hydrogels compared to the chemically cross-linked PAM analogues. The physically cross-linked graphene hydrogels also exhibit self-healing properties. These hydrogels prove to be efficient precursors for graphene-PAM aerogels with enhanced electrical conductivity and thermal stability.
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Affiliation(s)
- Sriya Das
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
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46
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Dey N, Samanta SK, Bhattacharya S. Selective and efficient detection of nitro-aromatic explosives in multiple media including water, micelles, organogel, and solid support. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8394-400. [PMID: 23992437 DOI: 10.1021/am401608q] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Selective detection of nitro-aromatic compounds (NACs) at nanomolar concentration is achieved for the first time in multiple media including water, micelles or in organogels as well as using test strips. Mechanism of interaction of NACs with highly fluorescent p-phenylenevinylene-based molecules has been described as the electron transfer phenomenon from the electron-rich chromophoric probe to the electron deficient NACs. The selectivity in sensing is guided by the pKa of the probes as well as the NACs under consideration. TNP-induced selective gel-to-sol transition in THF medium is also observed through the reorganization of molecular self-assembly and the portable test trips are made successfully for rapid on-site detection purpose.
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Affiliation(s)
- Nilanjan Dey
- Department of Organic Chemistry, Indian Institute of Science , Bangalore 560012, India
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47
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Mandal SK, Kar T, Das PK. Pristine Carbon-Nanotube-Included Supramolecular Hydrogels with Tunable Viscoelastic Properties. Chemistry 2013; 19:12486-96. [DOI: 10.1002/chem.201300302] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Revised: 06/07/2013] [Indexed: 12/23/2022]
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48
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Transformation from a heat-set organogel to a room-temperature organogel induced by alcohols. J INCL PHENOM MACRO 2013. [DOI: 10.1007/s10847-013-0335-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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49
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Xing P, Li S, Xin F, Hou Y, Hao A, Sun T, Su J. Multi-responsive supramolecular organogel with a crystalline-like structure. Carbohydr Res 2013; 367:18-24. [DOI: 10.1016/j.carres.2012.11.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 11/23/2012] [Accepted: 11/23/2012] [Indexed: 11/29/2022]
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50
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Samanta SK, Bhattacharya S. Excellent chirality transcription in two-component photochromic organogels assembled through J-aggregation. Chem Commun (Camb) 2013; 49:1425-7. [DOI: 10.1039/c2cc38221k] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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