1
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Bai R, Tolman NL, Peng Z, Liu H. Influence of Atmospheric Contaminants on the Work Function of Graphite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12159-12165. [PMID: 37581604 PMCID: PMC10469443 DOI: 10.1021/acs.langmuir.3c01459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/20/2023] [Indexed: 08/16/2023]
Abstract
Airborne hydrocarbon contamination occurs rapidly on graphitic surfaces and negatively impact many of their material properties, yet much of the molecular details of the contamination remains unknown. We use Kelvin probe force microscopy (KPFM) to study the time evolution of the surface potential of graphite exposed to ambient. After exfoliation in air, the surface potential of graphite is not homogeneous and contains features that are absent in the topography image. In addition, the heterogeneity of the surface potential images increased in the first few days followed by a decrease at longer exposure times. These observations are strong support of slow conformation change, phase separation, and/or dynamic displacement of the adsorbed airborne contaminants.
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Affiliation(s)
- Ruobing Bai
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Nathan L. Tolman
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Zhenbo Peng
- Chemical
Engineering College, Ningbo Polytechnic, Ningbo, Zhejiang 315806, P. R. China
| | - Haitao Liu
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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2
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Ma J, Xue D, Xu T, Wei G, Gu C, Zhang Y, Jiang T. Nonmetallic SERS-based biosensor for ultrasensitive and reproducible immunoassay of ferritin mediated by magnetic molybdenum disulfide nanoflowers and black phosphorus nanosheets. Colloids Surf B Biointerfaces 2023; 227:113338. [PMID: 37167693 DOI: 10.1016/j.colsurfb.2023.113338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/31/2023] [Accepted: 05/06/2023] [Indexed: 05/13/2023]
Abstract
To improve the curability of cancer patients, it is essential to propose an early diagnosis technology with ultra-high sensitivity and reliable biocompatibility. Herein, a sophisticated nonmetallic SERS-based immunosensor, comprised by a MoS2 @Fe3O4 nanoflower-based immunoprobe with magnetism and a black phosphorus (BP) nanosheet-based immunosubstrate, was proposed for the specific in-situ monitoring of ferritin (FER). The sandwich immunosensor was endowed with an excellent SERS performance mainly ascribed to a synergistic chemical enhancement as well as an additional electrostatic adsorption effect, achieving a limit of detection down to 7.3 × 10-5 μg/mL. Particularly, all the Raman label, target FER, and anti-FER could be completely degraded within 70 min under visible light irradiation owing to the favorable photocatalytic activities of MoS2 and BP which could be then effectively separated and collected with the assistance of an external magnet. Such a recyclable nonmetallic immunosensor holds great potential and practicality in the clinical screening of cancer.
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Affiliation(s)
- Jiali Ma
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Danni Xue
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Tao Xu
- Department of Pharmacy, Ningbo City First Hospital, Ningbo, 315211, Zhejiang, PR China
| | - Guodong Wei
- Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xian 710021, Shaanxi, PR China
| | - Chenjie Gu
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Yongling Zhang
- College of Information &Technology, Jilin Normal University, Siping 136000, Jilin, PR China.
| | - Tao Jiang
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
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3
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Yang D, Zhang X, Liu S, Xu Z, Yang Y, Li X, Ye Q, Xu Q, Zeng H. Diverse CsPbI 3 assembly structures: the role of surface acids. NANOSCALE 2023; 15:1637-1644. [PMID: 36594626 DOI: 10.1039/d2nr06208a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Surface ligand engineering, seed introduction and external driving forces play major roles in controlling the anisotropic growth of halide perovskites, which have been widely established in CsPbBr3 nanomaterials. However, colloidal CsPbI3 nanocrystals (NCs) have been less studied due to their low formation energy and low electronegativity. Here, by introducing different molar ratios of surface acids and amines to limit the monomer concentration of lead-iodine octahedra during nucleation, we report dumbbell-shaped CsPbI3 NCs obtained by the in situ self-assembly of nanospheres and nanorods with average sizes of 89 nm and 325 nm, respectively, which showed a high photoluminescence quantum yield of 89%. Structural and surface state analyses revealed that the strong binding of benzenesulfonic acid promoted the formation of a Pb(SO3-)x-rich surface of CsPbI3 assembly structures. Furthermore, the addition of benzenesulfonic acid increases the supersaturation threshold and the solubility of PbI2 in a high-temperature reaction system, and controls effectively the lead-iodine octahedron monomer concentration in the second nucleation stage. As a result, the as-synthesized CsPbI3-Sn NCs exhibited different assembly morphologies and high PLQYs, among which the role of sulfonate groups can be further verified by UV absorption and surface characteristics. The strategy provides a new frontier to rationally control the surface ligand-induced self-assembly structures of perovskites.
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Affiliation(s)
- Dandan Yang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
| | - Xuebin Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
| | - Shijia Liu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
| | - Zhiheng Xu
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Yang Yang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
| | - Xiaoming Li
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Qiuyu Ye
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
| | - Qin Xu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
| | - Haibo Zeng
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
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4
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Ushakov IE, Lenenko ND, Goloveshkin AS, Korlyukov AA, Golub AS. Influence of noncovalent intramolecular and host–guest interactions on imatinib binding to MoS 2 sheets: a PXRD/DFT study. CrystEngComm 2022. [DOI: 10.1039/d1ce01350e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The revealed pattern of imatinib drug binding to MoS2 sheets is promising for the combined exploitation of these species for therapeutic purposes.
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Affiliation(s)
- Ivan E. Ushakov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, 119991 Moscow, Russia
| | - Natalia D. Lenenko
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, 119991 Moscow, Russia
| | - Alexander S. Goloveshkin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, 119991 Moscow, Russia
| | - Alexander A. Korlyukov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, 119991 Moscow, Russia
| | - Alexandre S. Golub
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, 119991 Moscow, Russia
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5
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Wang Y, Iglesias D, Gali SM, Beljonne D, Samorì P. Light-Programmable Logic-in-Memory in 2D Semiconductors Enabled by Supramolecular Functionalization: Photoresponsive Collective Effect of Aligned Molecular Dipoles. ACS NANO 2021; 15:13732-13741. [PMID: 34370431 DOI: 10.1021/acsnano.1c05167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nowadays, the unrelenting growth of the digital universe calls for radically novel strategies for data processing and storage. An extremely promising and powerful approach relies on the development of logic-in-memory (LiM) devices through the use of floating gate and ferroelectric technologies to write and erase data in a memory operating as a logic gate driven by electrical bias. In this work, we report an alternative approach to realize the logic-in-memory based on two-dimensional (2D) transition metal dichalcogenides (TMDs) where multiple memorized logic output states have been established via the interface with responsive molecular dipoles arranged in supramolecular arrays. The collective dynamic molecular dipole changes of the axial ligand coordinated onto self-assembled metal phthalocyanine nanostructures on the surface of 2D TMD enables large reversible modulation of the Fermi level of both n-type molybdenum disulfide (MoS2) and p-type tungsten diselenide (WSe2) field-effect transistors (FETs), to achieve multiple memory states by programming and erasing with ultraviolet (UV) and with visible light, respectively. As a result, logic-in-memory devices were built up with our supramolecular layer/2D TMD architecture where the output logic is encoded by the motion of the molecular dipoles. Our strategy relying on the dynamic control of the 2D electronics by harnessing the functions of molecular-dipole-induced memory in a supramolecular hybrid layer represents a versatile way to integrate the functional programmability of molecular science into the next generation nanoelectronics.
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Affiliation(s)
- Ye Wang
- University of Strasbourg,CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Daniel Iglesias
- University of Strasbourg,CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Sai Manoj Gali
- Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc 20, 7000 Mons, Belgium
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Paolo Samorì
- University of Strasbourg,CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
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6
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Brill AR, Kafri A, Mohapatra PK, Ismach A, de Ruiter G, Koren E. Modulating the Optoelectronic Properties of MoS 2 by Highly Oriented Dipole-Generating Monolayers. ACS APPLIED MATERIALS & INTERFACES 2021; 13:32590-32597. [PMID: 34190537 DOI: 10.1021/acsami.1c09035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The noncovalent functionalization of two-dimensional materials (2DMs) with bespoke organic molecules is of central importance for future nanoscale electronic devices. Of particular interest is the incorporation of molecular functionalities that can modulate the physicochemical properties of the 2DMs via noninvasive external stimuli. In this study, we present the reversible modulation of the photoluminescence, spectroscopic properties (Raman), and charge transport characteristics of molybdenum disulfide (MoS2)-based devices via photoisomerization of a self-assembled monolayer of azobenzene-modified triazatriangulene molecules. The observed (opto)electronic modulations are explained by the n-type doping of the MoS2 lattice induced by the photoisomerization of the highly ordered azobenzene monolayer. This novel behavior could have profound effects on future composite 2DM-based (opto)electronics.
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Affiliation(s)
- Adam R Brill
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
- Faculty of Materials Science and Engineering, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Alonit Kafri
- Faculty of Materials Science and Engineering, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Pranab K Mohapatra
- Department of Materials Science and Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
| | - Ariel Ismach
- Department of Materials Science and Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
| | - Graham de Ruiter
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Elad Koren
- Faculty of Materials Science and Engineering, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
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7
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Brill AR, Biswas S, Caspary Toroker M, de Ruiter G, Koren E. Dipole-Induced Raman Enhancement Using Noncovalent Azobenzene-Functionalized Self-Assembled Monolayers on Graphene Terraces. ACS APPLIED MATERIALS & INTERFACES 2021; 13:10271-10278. [PMID: 33591709 DOI: 10.1021/acsami.0c20454] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Graphene is a promising material in the field of interface science, especially for noncovalent functionalization, sensing, and for applications in catalysis and nanoelectronics. The noncovalent self-assembly of aromatic molecules on graphene promotes electronic coupling through π-π interactions that allows for quenching of the fluorescence of adsorbent molecules and the enhancement of their Raman spectra via graphene-enhanced Raman spectroscopy (GERS). Although recent work has explored the Raman enhancement on mono- and bilayer graphene, the layer dependence of both electronic phenomena (i.e., fluorescence quenching and Raman enhancement) has largely remained underexplored. Similarly, the effect of near-surface molecular dipoles on GERS has sparsely been examined. In this work, we employ self-assembled monolayers of azobenzene-decorated triazatriangulene molecules (AzoTATA) on graphene terraces to examine the effect of switchable molecular dipoles on the GERS effect, which occurs as a function of azobenzene photoisomerization. Furthermore, using empirical and computational methods, we present a systematic study for deriving the mechanism of GERS enhancement and fluorescence quenching on graphene terraces.
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Affiliation(s)
- Adam R Brill
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
- Faculty of Materials Science and Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Santu Biswas
- Faculty of Materials Science and Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Maytal Caspary Toroker
- Faculty of Materials Science and Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
- The Nancy and Stephen Grand Technion Energy Program, Technion-Israel Institute of Technology, Haifa 3200008, Israel
| | - Graham de Ruiter
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Elad Koren
- Faculty of Materials Science and Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
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8
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Jayawardena HSN, Liyanage SH, Rathnayake K, Patel U, Yan M. Analytical Methods for Characterization of Nanomaterial Surfaces. Anal Chem 2021; 93:1889-1911. [PMID: 33434434 PMCID: PMC7941215 DOI: 10.1021/acs.analchem.0c05208] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- H Surangi N Jayawardena
- Department of Chemistry, The University of Alabama in Huntsville, Huntsville, Alabama 35899, United States
| | - Sajani H Liyanage
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States
| | - Kavini Rathnayake
- Department of Chemistry, The University of Alabama in Huntsville, Huntsville, Alabama 35899, United States
| | - Unnati Patel
- Department of Chemistry, The University of Alabama in Huntsville, Huntsville, Alabama 35899, United States
| | - Mingdi Yan
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States
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