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Sun Y, Wang C, Sun M, Fan Z. Bioinspired polymeric pigments to mimic natural hair coloring. RSC Adv 2021; 11:1694-1699. [PMID: 35424122 PMCID: PMC8693533 DOI: 10.1039/d0ra09539g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 12/16/2020] [Indexed: 12/24/2022] Open
Abstract
Due to an increasingly aging population, hair dyeing has become more necessary in daily life; however synthetic hair dyes often have the disadvantages of harsh dyeing conditions, a slow dyeing process and biological toxicity. Herein, we developed a bioinspired approach to mimic the natural hair dyeing process under mild conditions. Compared to the existing polydopamine deposition approach with harsh conditions, mild conditions and effective deposition were achieved here. First, in the presence of tyrosine hydroxylase and metal ions, dopamine could be oxidized into polydopamine, a mimic of human eumelanin, and then self-assembled into nanometer-scale pigments. Through optimizing the experimental parameters, various colors and the desired darkness could be achieved within less than 1 minute. In addition, significant durability was observed after continuous washing with polydopamine assemblies as hair dyes. Morphological analysis was applied to verify the deposition of polydopamine assemblies onto the hair surface, which induces the hair color change. Also, animal studies were conducted to evaluate the efficiency and biological toxicity of this approach. Overall, this bioinspired approach could provide a new avenue for biocompatible and effective nanomaterial-based hair dyes for at-home use.
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Affiliation(s)
- Yu Sun
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University Shanghai 201804 China
| | - Congyu Wang
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University Shanghai 201804 China
| | - Min Sun
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University Shanghai 201804 China
| | - Zhen Fan
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University Shanghai 201804 China
- Institute for Advanced Study, Tongji University Shanghai 200092 China
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Nanofabrication Techniques in Large-Area Molecular Electronic Devices. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10176064] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The societal impact of the electronics industry is enormous—not to mention how this industry impinges on the global economy. The foreseen limits of the current technology—technical, economic, and sustainability issues—open the door to the search for successor technologies. In this context, molecular electronics has emerged as a promising candidate that, at least in the short-term, will not likely replace our silicon-based electronics, but improve its performance through a nascent hybrid technology. Such technology will take advantage of both the small dimensions of the molecules and new functionalities resulting from the quantum effects that govern the properties at the molecular scale. An optimization of interface engineering and integration of molecules to form densely integrated individually addressable arrays of molecules are two crucial aspects in the molecular electronics field. These challenges should be met to establish the bridge between organic functional materials and hard electronics required for the incorporation of such hybrid technology in the market. In this review, the most advanced methods for fabricating large-area molecular electronic devices are presented, highlighting their advantages and limitations. Special emphasis is focused on bottom-up methodologies for the fabrication of well-ordered and tightly-packed monolayers onto the bottom electrode, followed by a description of the top-contact deposition methods so far used.
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Herrer L, Ismael A, Martín S, Milan DC, Serrano JL, Nichols RJ, Lambert C, Cea P. Single molecule vs. large area design of molecular electronic devices incorporating an efficient 2-aminepyridine double anchoring group. NANOSCALE 2019; 11:15871-15880. [PMID: 31414113 DOI: 10.1039/c9nr05662a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
When a molecule is bound to external electrodes by terminal anchor groups, the latter are of paramount importance in determining the electrical conductance of the resulting molecular junction. Here we explore the electrical properties of a molecule with bidentate anchor groups, namely 4,4'-(1,4-phenylenebis(ethyne-2,1-diyl))bis(pyridin-2-amine), in both large area devices and at the single molecule level. We find an electrical conductance of 0.6 × 10-4G0 and 1.2 × 10-4G0 for the monolayer and for the single molecule, respectively. These values are approximately one order of magnitude higher than those reported for monodentate materials having the same molecular skeleton. A combination of theory and experiments is employed to understand the conductance of monolayer and single molecule electrical junctions featuring this new multidentate anchor group. Our results demonstrate that the molecule has a tilt angle of 30° with respect to the normal to the surface in the monolayer, while the break-off length in the single molecule junction occurs for molecules having a tilt angle estimated as 40°, which would account for the difference in their conductance values per molecule. The bidentate 2-aminepyridine anchor is of general interest as a contact group, since this terminal functionalized aromatic ring favours binding of the adsorbate to the metal contact resulting in enhanced conductance values.
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Affiliation(s)
- L Herrer
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain. and Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopias Avanzadas (LMA), Edificio I+D Campus Río Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain.
| | - A Ismael
- Department of Physics, University of Lancaster, Lancaster, LA1 4YB, UK. and Department of Physics, College of Education for Pure Science, Tikrit University, Tikrit, Iraq
| | - S Martín
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain. and Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
| | - D C Milan
- Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - J L Serrano
- Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopias Avanzadas (LMA), Edificio I+D Campus Río Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain. and Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK. and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - R J Nichols
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
| | - C Lambert
- Department of Physics, University of Lancaster, Lancaster, LA1 4YB, UK.
| | - P Cea
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain. and Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopias Avanzadas (LMA), Edificio I+D Campus Río Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain. and Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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Li J, Sun CL, An P, Liu X, Dong R, Sun J, Zhang X, Xie Y, Qin C, Zheng W, Zhang HL, Jiang X. Construction of Dopamine-Releasing Gold Surfaces Mimicking Presynaptic Membrane by On-Chip Electrochemistry. J Am Chem Soc 2019; 141:8816-8824. [PMID: 31117642 DOI: 10.1021/jacs.9b01003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a strategy to construct a dopamine-releasing gold surface mimicking a presynaptic membrane on a microfluidic chip to simulate in vivo neural signaling. We constructed dopamine self-assembled monolayers (DA SAMs) by electrochemical deprotection of methyl group-protected DA SAMs on a gold surface. Electrochemically controllable release of DA SAMs can be realized by applying nonhydrolytic negative potential on the gold surface. Our method in constructing DA SAMs avoids the polymerization and protonation of DA molecules which may lead to the failure of the DA SAM formation. By combining microfluidics, we realized spatial and temporal controllable release of DA by electrochemistry from the gold surface. Furthermore, by culturing neurons on the patterned DA SAMs, the interface between the DA SAMs and the neurons could serve as a presynaptic membrane, and the spatiotemporal release of DA could modulate the neuron activity with high precision. Our study holds great promise in the fields of neurobiology research and drug screening.
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Affiliation(s)
- Jun Li
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Chun-Lin Sun
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Pengrong An
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Xiaoyan Liu
- CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
| | - Ruihua Dong
- CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
| | - Jinghong Sun
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Xingyu Zhang
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Yanbo Xie
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Chuanguang Qin
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Wenfu Zheng
- CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Xingyu Jiang
- Department of Biomedical Engineering , Southern University of Science and Technology , No. 1088 Xueyuan Rd, Nanshan District , Shenzhen , Guangdong 518055 , P. R. China.,CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
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Herrer IL, Ismael AK, Milán DC, Vezzoli A, Martín S, González-Orive A, Grace I, Lambert C, Serrano JL, Nichols RJ, Cea P. Unconventional Single-Molecule Conductance Behavior for a New Heterocyclic Anchoring Group: Pyrazolyl. J Phys Chem Lett 2018; 9:5364-5372. [PMID: 30160491 DOI: 10.1021/acs.jpclett.8b02051] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Electrical conductance across a molecular junction is strongly determined by the anchoring group of the molecule. Here we highlight the unusual behavior of 1,4-bis(1H-pyrazol-4-ylethynyl)benzene that exhibits unconventional junction current versus junction-stretching distance curves, which are peak-shaped and feature two conducting states of 2.3 × 10-4 G0 and 3.4 × 10-4 G0. A combination of theory and experiments is used to understand the conductance of single-molecule junctions featuring this new anchoring group, i.e., pyrazolyl. These results demonstrate that the pyrazolyl moiety changes its protonation state and contact binding during junction evolution and that it also binds in either end-on or facial geometries with gold contacts. The pyrazolyl moiety holds general interest as a contacting group, because this linkage leads to a strong double anchoring of the molecule to the gold electrode, resulting in enhanced conductance values.
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Affiliation(s)
- I Lucia Herrer
- Departamento de Química Física, Facultad de Ciencias , Universidad de Zaragoza , 50009 Zaragoza , Spain
- Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopias Avanzadas (LMA), edificio i+d Campus Río Ebro , Universidad de Zaragoza , C/Mariano Esquillor, s/n , 50018 Zaragoza , Spain
| | - Ali K Ismael
- Department of Physics , University of Lancaster , Lancaster LA1 4YB , United Kingdom
- Department of Physics, College of Education for Pure Science , Tikrit University , Tikrit , Iraq
| | - David C Milán
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool L69 7ZD , United Kingdom
| | - Andrea Vezzoli
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool L69 7ZD , United Kingdom
| | - Santiago Martín
- Departamento de Química Física, Facultad de Ciencias , Universidad de Zaragoza , 50009 Zaragoza , Spain
- Instituto de Ciencias de Materiales de Aragón (ICMA) , Universidad de Zaragoza-CSIC , 50009 Zaragoza , Spain
| | - Alejandro González-Orive
- Technical and Macromolecular Chemistry , University of Paderborn , Warburger Straße 100 , 33098 Paderborn , Germany
| | - Iain Grace
- Department of Physics , University of Lancaster , Lancaster LA1 4YB , United Kingdom
| | - Colin Lambert
- Department of Physics , University of Lancaster , Lancaster LA1 4YB , United Kingdom
| | - José L Serrano
- Departamento de Química Física, Facultad de Ciencias , Universidad de Zaragoza , 50009 Zaragoza , Spain
- Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopias Avanzadas (LMA), edificio i+d Campus Río Ebro , Universidad de Zaragoza , C/Mariano Esquillor, s/n , 50018 Zaragoza , Spain
| | - Richard J Nichols
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool L69 7ZD , United Kingdom
| | - Pilar Cea
- Departamento de Química Física, Facultad de Ciencias , Universidad de Zaragoza , 50009 Zaragoza , Spain
- Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopias Avanzadas (LMA), edificio i+d Campus Río Ebro , Universidad de Zaragoza , C/Mariano Esquillor, s/n , 50018 Zaragoza , Spain
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Investigation of the geometrical arrangement and single molecule charge transport in self-assembled monolayers of molecular towers based on tetraphenylmethane tripod. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.174] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Redox-responsive PAEFc- b -PDMAEMA amphiphilic block copolymer self-assembly micelles: Physicochemical properties and anticancer drug controlled release. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.12.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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