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Samadi Khoshkhoo M, Prudnikau A, Chashmejahanbin MR, Helbig R, Lesnyak V, Cuniberti G. Multicolor Patterning of 2D Semiconductor Nanoplatelets. ACS NANO 2021; 15:17623-17634. [PMID: 34665592 DOI: 10.1021/acsnano.1c05400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanocrystal micro/nanoarrays with multiplexed functionalities are of broad interest in the field of nanophotonics, cellular dynamics, and biosensing due to their tunable electrical and optical properties. This work focuses on the multicolor patterning of two-dimensional nanoplatelets (NPLs) via two sequential self-assembly and direct electron-beam lithography steps. By using scanning electron microscopy, atomic force microscopy, and fluorescence microscopy, we demonstrate the successful fabrication of fluorescent nanoarrays with a thickness of only two or three monolayers (7-11 nm) and a feature line width of ∼40 nm, which is three to four NPLs wide. To this end, first, large-area thin films of red-emitting CdSe/ZnyCd1-yS and green-emitting CdSe1-xSx/ZnyCd1-yS core/shell NPLs are fabricated based on Langmuir-type self-assembly at the liquid/air interface. By varying the concentration of ligands in the subphase, we investigate the effect of interaction potential on the film's final characteristics to prepare thin superlattices suitable for the patterning step. Equipped with the ability to fabricate a uniform superlattice with a controlled thickness, we next perform nanopatterning on a thin film of NPLs utilizing a direct electron-beam lithography (EBL) technique. The effect of acceleration voltage, aperture size, and e-beam dosage on the nanopattern's resolution and fidelity is investigated for both of the presented NPLs. After successfully optimizing EBL parameters to fabricate single-color nanopatterns, we finally focus on fabricating multicolor patterns. The obtained micro/nanoarrays provide us with an innovative experimental platform to investigate biological interactions as well as Förster resonance energy transfer.
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Affiliation(s)
- Mahdi Samadi Khoshkhoo
- Institute of Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden 01062, Germany
| | - Anatol Prudnikau
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Mohammad Reza Chashmejahanbin
- Institute of Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden 01062, Germany
| | - Ralf Helbig
- Leibniz Institute of Polymer Research Dresden and Max-Bergmann Center for Biomaterials, Hohe Straße 6, 01069 Dresden, Germany
| | - Vladimir Lesnyak
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute of Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden 01062, Germany
- Dresden Center for Intelligent Materials (DCIM), Technische Universität Dresden, School of Engineering Sciences, 01069 Dresden, Germany
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Ahmad R, Laschuk NO, Ebralidze II, Zenkina OV, Easton EB. Probing the Influence of Counter Electrode Structure on Electrochromic‐Device Operating Potentials and Performance Using Electrochemical Impedance Spectroscopy. ChemElectroChem 2021. [DOI: 10.1002/celc.202100195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Rana Ahmad
- Electrochemical Materials Lab Faculty of Science Ontario Tech University (University of Ontario Institute of Technology) 2000 Simcoe Street North L1G 0C5 Oshawa Ontario Canada
| | - Nadia O. Laschuk
- Electrochemical Materials Lab Faculty of Science Ontario Tech University (University of Ontario Institute of Technology) 2000 Simcoe Street North L1G 0C5 Oshawa Ontario Canada
| | - Iraklii I. Ebralidze
- Electrochemical Materials Lab Faculty of Science Ontario Tech University (University of Ontario Institute of Technology) 2000 Simcoe Street North L1G 0C5 Oshawa Ontario Canada
| | - Olena V. Zenkina
- Electrochemical Materials Lab Faculty of Science Ontario Tech University (University of Ontario Institute of Technology) 2000 Simcoe Street North L1G 0C5 Oshawa Ontario Canada
| | - E. Bradley Easton
- Electrochemical Materials Lab Faculty of Science Ontario Tech University (University of Ontario Institute of Technology) 2000 Simcoe Street North L1G 0C5 Oshawa Ontario Canada
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3
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Dief EM, Darwish N. Ultrasonic Generation of Thiyl Radicals: A General Method of Rapidly Connecting Molecules to a Range of Electrodes for Electrochemical and Molecular Electronics Applications. ACS Sens 2021; 6:573-580. [PMID: 33355460 DOI: 10.1021/acssensors.0c02413] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report ultrasonic generation of thiyl radicals as a general method for functionalizing a range of surfaces with organic molecules. The method is simple, rapid, can be utilized at ambient conditions and involves sonicating a solution of disulfide molecules, homolytically cleaving S-S bonds and generating thiyl radicals that react with the surfaces by forming covalently bound monolayers. Full molecular coverages on conducting oxides (ITO), semiconductors (Si-H), and carbon (GC) electrode surfaces can be achieved within a time scale of 15-90 min. The suitability of this method to connect the same molecule to different electrodes enabled comparing the conductivity of single molecules and the electrochemical electron transfer kinetics of redox active monolayers as a function of the molecule-electrode contact. We demonstrate, using STM break-junction technique, single-molecule heterojunction comprising Au-molecule-ITO and Au-molecule-carbon circuits. We found that despite using the same molecule, the single-molecule conductivity of Au-molecule-carbon circuits is about an order of magnitude higher than that of Au-molecule-ITO circuits. The same trend was observed for electron transfer kinetics, measured using electrochemical impedance spectroscopy for ferrocene-terminated monolayers on carbon and ITO. This suggests that the interfacial bond between different electrodes and the same molecule can be used to tune the conductivity of single-molecule devices and to control the rate of charge transport in redox active monolayers, opening prospects for relating various types of interfacial charge-transfer rate processes.
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Affiliation(s)
- Essam M. Dief
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Nadim Darwish
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
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Peng J, Huang Q, Liu Y, Liu F, Zhang C, Huang Y, Huang W. The synthesis of graphene oxide covalently linked with nickel tetraamino phthalocyanine: A photoelectrochemical sensor for the analysis of rifampicin irradiated with blue light. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201800451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jinyun Peng
- College of Chemistry and Chemical EngineeringGuangxi Normal University for Nationalities Chongzuo China
- School of PharmacyHenan University of Traditional Chinese Medicine Zhengzhou China
| | - Qing Huang
- School of PharmacyHenan University of Traditional Chinese Medicine Zhengzhou China
| | - Yuxia Liu
- College of Physics and Electronic EngineeringGuangxi Normal University for Nationalities Chongzuo China
| | - Fengping Liu
- College of Chemistry and Chemical EngineeringGuangxi Normal University for Nationalities Chongzuo China
| | - Cuizhong Zhang
- College of Chemistry and Chemical EngineeringGuangxi Normal University for Nationalities Chongzuo China
| | - Yingying Huang
- College of Chemistry and Chemical EngineeringGuangxi Normal University for Nationalities Chongzuo China
| | - Wei Huang
- College of Chemistry and Chemical EngineeringGuangxi Normal University for Nationalities Chongzuo China
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5
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Castro KADF, Figueira F, Almeida Paz FA, Tomé JPC, da Silva RS, Nakagaki S, Neves MGPMS, Cavaleiro JAS, Simões MMQ. Copper-phthalocyanine coordination polymer as a reusable catechol oxidase biomimetic catalyst. Dalton Trans 2019; 48:8144-8152. [DOI: 10.1039/c9dt00378a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We report the synthesis, characterization and catalytic activity of a new phthalocyanine coordination polymer (Cu4CuPcSPy).
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Affiliation(s)
- Kelly A. D. F. Castro
- QOPNA & LAQV-REQUIMTE
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Flávio Figueira
- QOPNA & LAQV-REQUIMTE
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | | - João P. C. Tomé
- QOPNA & LAQV-REQUIMTE
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Roberto S. da Silva
- Faculty of Pharmaceutical Sciences
- University of São Paulo
- Ribeirão Preto
- Brazil
| | - Shirley Nakagaki
- Laboratory of Bioinorganic and Catalysis and Department of Chemistry
- Federal University of Paraná
- Curitiba
- Brazil
| | | | - José A. S. Cavaleiro
- QOPNA & LAQV-REQUIMTE
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Mário M. Q. Simões
- QOPNA & LAQV-REQUIMTE
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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Pan A, Jurow MJ, Qiu F, Yang J, Ren B, Urban JJ, He L, Liu Y. Nanorod Suprastructures from a Ternary Graphene Oxide-Polymer-CsPbX 3 Perovskite Nanocrystal Composite That Display High Environmental Stability. NANO LETTERS 2017; 17:6759-6765. [PMID: 28968132 DOI: 10.1021/acs.nanolett.7b02959] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Despite the exceptional optoelectronic characteristics of the emergent perovskite nanocrystals, the ionic nature greatly limits their stability, and thus restricts their potential applications. Here we have adapted a self-assembly strategy to access a rarely reported nanorod suprastructure that provide excellent encapsulation of perovskite nanocrystals by polymer-grafted graphene oxide layers. Polyacrylic acid-grafted graphene oxide (GO-g-PAA) was used as a surface ligand during the synthesis of the CsPbX3 perovskite nanocrystals (NCs), yielding particles (5-12 nm) with tunable halide compositions that were homogeneously embedded in the GO-g-PAA matrix. The resulting NC-GO-g-PAA exhibits a higher photoluminescence quantum yield than previously reported encapsulated NCs while maintaining an easily tunable bandgap, allowing for emission spanning the visible spectrum. The NC-GO-g-PAA hybrid further self-assembles into well-defined nanorods upon solvent treatment. The resulting nanorod morphology imparts extraordinary chemical stability toward protic solvents such as methanol and water and much enhanced thermal stability. The introduction of barrier layers by embedding the perovskite NCs in the GO-g-PAA matrix, together with its unique assembly into nanorods, provides a novel strategy to afford robust perovskite emissive materials with environmental stability that may meet or exceed the requirement for optoelectronic applications.
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Affiliation(s)
- Aizhao Pan
- Department of Chemistry, School of Science, Xi'an Jiaotong University , Xianning WestRoad, 28, Xi'an, 710049, China
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Matthew J Jurow
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Fen Qiu
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Juan Yang
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Baoyi Ren
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province, College of Applied Chemistry, Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Jeffrey J Urban
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Ling He
- Department of Chemistry, School of Science, Xi'an Jiaotong University , Xianning WestRoad, 28, Xi'an, 710049, China
| | - Yi Liu
- The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
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