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Waldman L, Haunert DP, Carson JD, Weiskopf N, Waldman JV, LeBlanc G. Maintaining Electrochemical Performance of Flexible ITO-PET Electrodes under High Strain. ACS OMEGA 2024; 9:29732-29738. [PMID: 39005794 PMCID: PMC11238234 DOI: 10.1021/acsomega.4c03288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 06/04/2024] [Accepted: 06/13/2024] [Indexed: 07/16/2024]
Abstract
Flexible electrode materials, particularly indium tin oxide (ITO)-coated polyethylene terephthalate (PET), have attracted the attention of researchers for a wide variety of applications. However, there has been limited attention to the effects of electrode flexibility during electrochemical processes. In this research article, we studied how bending commercially available ITO-PET electrodes impacts the electrodeposition process of polyaniline (PANI). Thicker ITO layers start cracking at a normalized strain of 0.10 (bending radius of 10 mm), and cracking becomes detrimental to full deposition at a normalized strain of 0.16 or higher (bending radius of 6 mm or lower). Thinner ITO layers were evaluated as electrodes in electrochemical applications; however, the higher resistance of these electrodes prevented uniform electrodeposition of PANI. In order to overcome the issues of cracking, conductive thin films and copper tape were explored as low-cost methods for electrically bridging cracks in the electrode. While conductive thin films reduced the resistance effect, copper tape was found to fully restore the original electrochemical activity as measured by chronoamperometry and enable uniform electrodeposition at a bending radius as low as 3 mm. This strategy was then demonstrated by performing electrochromic bleaching of PANI under high-strain conditions. These studies illustrate some of the limitations of ITO-PET electrodes and strategies for overcoming these limitations for future applications that require a high degree of flexibility in a transparent electrode substrate.
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Affiliation(s)
- Laura
J. Waldman
- Mechanical
Engineering, University of Tulsa, 800 S Tucker Dr., Tulsa, Oklahoma 74104-9700, United States
| | - Daniel P. Haunert
- Chemistry
and Biochemistry, University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Jack D. Carson
- Chemistry
and Biochemistry, University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Nate Weiskopf
- Chemistry
and Biochemistry, University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Julia V. Waldman
- Chemistry
and Biochemistry, University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
| | - Gabriel LeBlanc
- Chemistry
and Biochemistry, University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma 74104, United States
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2
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Parambath JBM, Vijai Anand K, Alawadhi H, Mohamed AA. Flexible Copper Films Modification via Spontaneous Reduction of Aryldiazonium Gold Salts: Unraveling Surface Properties and Energy Profile. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9797-9808. [PMID: 38669636 DOI: 10.1021/acs.langmuir.4c00977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
In this study, we report the modification of flexible copper films via the spontaneous reduction of aryldiazonium gold salts [X-4-C6H4N≡N]AuCl4 (X═COOH, NO2). The electroless modification involves dipping of flexible copper films in the aryldiazonium gold solutions for a few seconds, under ambient conditions, followed by a washing step with deionized water to obtain a mechanically robust gold-aryl coating. The chemical composition, morphology, electronic structure, and optical properties of the gold-aryl layer and the flexibility of the modified copper films are supported by the results from X-ray photoelectron spectroscopy (XPS), electrochemistry, contact angle, scanning electron microscopy (SEM), and ultraviolet photoelectron spectroscopy (UPS). XPS surface analysis showed metallic gold in addition to C-C, C-O/C-N, and C═O functional groups from the grafted aryls. Cu 2p showed metallic copper as a major component and a small amount of Cu(II) ions. Wettability studies showed that Au-COOH@Cu increased the contact angle of the bare copper films from 68.0 ± 0.7° to 82.0° ± 0.7°, while Au-NO2@Cu increased the contact angle to 134.0° ± 0.3°. UPS energy profile analysis of [HOOC-4-C6H4N≡N]AuCl4 (valence band maximum = 1.91 eV) exhibited greater reducibility than [O2N-4-C6H4N≡N]AuCl4 (valence band maximum = 2.91 eV). The lower ionization potential of [HOOC-4-C6H4N≡N]AuCl4 (IP = 4.33 eV) enhanced the reactivity upon copper film contact, potentially inducing efficient energy level alignment, compared with [O2N-4-C6H4N≡N]AuCl4 (IP = 5.62 eV). UPS results were further supported by electrochemistry investigation which revealed that [HOOC-4-C6H4N≡N]AuCl4 is easily reducible compared with [O2N-4-C6H4N≡N]AuCl4. The findings presented here hold significant implications for developing flexible copper films and pave the way for future advancements in electronic material modification for industrial applications.
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Affiliation(s)
- Javad B M Parambath
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Physics, Sathyabama Institute of Science & Technology, Chennai 600 119, Tamil Nadu, India
- Department of Chemistry, Sathyabama Institute of Science & Technology, Chennai 600 119, Tamil Nadu, India
| | - Kabali Vijai Anand
- Department of Physics, Sathyabama Institute of Science & Technology, Chennai 600 119, Tamil Nadu, India
| | - Hussain Alawadhi
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Applied Physics & Astronomy, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Ahmed A Mohamed
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
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3
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Bastide M, Frath D, Gam‐Derouich S, Lacroix J. Electrochemical and Plasmon‐induced Grafting of n‐Dopable π‐Conjugated Oligomers. ChemElectroChem 2021. [DOI: 10.1002/celc.202100563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mathieu Bastide
- Université de Paris ITODYS, CNRS, UMR 7086 15 rue J.-A. de Baïf 75205 Paris Cedex 13 France
| | - Denis Frath
- Université de Paris ITODYS, CNRS, UMR 7086 15 rue J.-A. de Baïf 75205 Paris Cedex 13 France
| | - Sarra Gam‐Derouich
- Université de Paris ITODYS, CNRS, UMR 7086 15 rue J.-A. de Baïf 75205 Paris Cedex 13 France
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McNeill AR, Martinez-Gazoni R, Reeves RJ, Allen MW, Downard AJ. Electroreduction of Aryldiazonium Ion at the Polar and Non-Polar Faces of ZnO: Characterisation of the Grafted Films and Their Influence on Near-Surface Band Bending. Chemphyschem 2021; 22:1344-1351. [PMID: 33942472 DOI: 10.1002/cphc.202100240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/02/2021] [Indexed: 01/02/2023]
Abstract
ZnO is a strong candidate for transparent electronic devices due to its wide band gap and earth-abundance, yet its practical use is limited by its surface metallicity arising from a surface electron accumulation layer (SEAL). The SEAL forms by hydroxylation of the surface under normal atmospheric conditions, and is present at all crystal faces of ZnO, although with differing hydroxyl structures. Multilayer aryl films grafted from aryldiazonium salts have previously been shown to decrease the downward bending at O-polar ZnO thin films, with Zn-O-C bonds anchoring the aryl films to the substrate. Herein we show that the Zn-polar (0001), O-polar (000 1 ‾ ), and non-polar m-plane (10 1 ‾ 0) faces of ZnO single crystals, can also be successfully electrografted with nitrophenyl (NP) films. In all cases, X-ray photoelectron spectroscopy (XPS) measurements reveal that the downward surface band bending decreases after modification. XPS provides strong evidence for Zn-O-C bonding at each face. Electrochemical reduction of NP films on O-polar ZnO single crystals converts the film to a mainly aminophenyl layer, although with negligible further change in band bending. This contrasts with the large upward shifts in band bending caused by X-ray induced reduction.
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Affiliation(s)
- Alexandra R McNeill
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, 4180, Christchurch, New Zealand.,Syft Technologies, 3 Craft Place, 8024, Christchurch, New Zealand
| | - Rodrigo Martinez-Gazoni
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, 4180, Christchurch, New Zealand
| | - Roger J Reeves
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, 4180, Christchurch, New Zealand
| | - Martin W Allen
- Department of Electrical and Computer Engineering, University of Canterbury, Private Bag 4800, 4180, Christchurch, New Zealand
| | - Alison J Downard
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, 4180, Christchurch, New Zealand
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5
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Ullah W, Herzog G, Vilà N, Walcarius A. Electrografting and electropolymerization of nanoarrays of PANI filaments through silica mesochannels. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2020.106896] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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6
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Dithienylpyrrole Electrografting on a Surface through the Electroreduction of Diazonium Salts. ELECTROCHEM 2020. [DOI: 10.3390/electrochem1010003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The control of the interface and the adhesion process are key issues for the development of new application based on electrochromic materials. In this work the functionalization of an electrode’s surface through electroreduction of diazonium generated in situ from 4-(2,5-di-thiophen-2-yl-pyrrol-1-yl)-phenylamine (SNS-An) has been proposed. The synthesis of the aniline derivative SNS-An was performed and the electrografting was investigated by cyclic voltammetry on various electrodes. Then the organic thin film was fully characterized by several techniques and XPS analysis confirms the presence of an organic film based on the chemical composition of the starting monomer and allows an estimation of its thickness confirmed by AFM scratching measurements. Depending on the number of electrodeposition cycles, the thickness varies from 2 nm to 10 nm, which corresponds to a few grafted oligomers. In addition, the grafted film showed a good electrochemical stability depending on the scan rates up to 400 V/s and the electrochemical response of the modified electrode towards several redox probes showed that the attached layer acts as a conductive switch. Therefore, the electrode behaves as a barrier to electron transfer when the standard redox potential of the probe is below the layer switching potential, whereas the layer can be considered as transparent towards the electron transfer for redox probes with a redox potential above it.
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7
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Schuurman JC, McNeill AR, Martinez-Gazoni RF, Scott JI, Reeves RJ, Allen MW, Downard AJ. The effect of covalently bonded aryl layers on the band bending and electron density of SnO2 surfaces probed by synchrotron X-ray photoelectron spectroscopy. Phys Chem Chem Phys 2019; 21:17913-17922. [DOI: 10.1039/c9cp03040a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A downward to upward surface band bending change can be induced by grafted 4-(trifluoromethyl)phenyl groups on SnO2.
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Affiliation(s)
- Joel C. Schuurman
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Alexandra R. McNeill
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Rodrigo F. Martinez-Gazoni
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Jonty I. Scott
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Roger J. Reeves
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Martin W. Allen
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Wellington 6012
- New Zealand
- Department of Electrical and Computer Engineering
- University of Canterbury
| | - Alison J. Downard
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
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8
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Jacques A, Saad A, Chehimi MM, Poleunis C, Delcorte A, Delhalle J, Mekhalif Z. Nitinol Modified by In Situ Generated Diazonium Salts as Adhesion Promoters for Photopolymerized Pyrrole. ChemistrySelect 2018. [DOI: 10.1002/slct.201802209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Amory Jacques
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES)University of Namur rue de Bruxelles, 61 B-5000 Namur Belgium
| | - Ali Saad
- Laboratory of MaterialsMolecules and Applications, IPESTUniversity of Carthage Sidi Bou Said road, B.P. 51 2070 La Marsa Tunisia
| | | | - Claude Poleunis
- Université Catholique de LouvainInstitute of Condensed Matter and Nanosciences (IMCN) Croix du Sud 1 Louvain-la-Neuve Belgium
| | - Arnaud Delcorte
- Université Catholique de LouvainInstitute of Condensed Matter and Nanosciences (IMCN) Croix du Sud 1 Louvain-la-Neuve Belgium
| | - Joseph Delhalle
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES)University of Namur rue de Bruxelles, 61 B-5000 Namur Belgium
| | - Zineb Mekhalif
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES)University of Namur rue de Bruxelles, 61 B-5000 Namur Belgium
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9
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Diazonium Salts: Versatile Molecular Glues for Sticking Conductive Polymers to Flexible Electrodes. SURFACES 2018. [DOI: 10.3390/surfaces1010005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adhesion of polymers to surfaces is of the upmost importance in timely applications such as protective coatings, biomaterials, sensors, new power sources and soft electronics. In this context, this work examines the role of molecular interactions in the adhesion of polypyrrole thin films to flexible Indium Tin Oxide (ITO) electrodes grafted with aryl layers from various diazonium salts, namely 4-carboxybenzenediazonium (ITO-CO2H), 4-sulfonicbenzenediazonium (ITO-SO3H), 4-N,N-dimethylbenzenediazonium (ITO-N(CH3)2), 4-aminobenzenediazonium (ITO-NH2), 4-cyanobenzenediazonium (ITO-CN) and 4-N-phenylbenzenediazonium (ITO-NHPh). It was demonstrated that PPy thin layers were adherent to all aryl-modified surfaces, whereas adhesive failure was noted for bare ITO following simple solvent washing or sonication. Adhesion of polypyrrole was investigated in terms of hydrophilic/hydrophobic character of the underlying aryl layer as probed by contact angle measurements. It was found that sulfonic acid-doped polypyrrole (PPy-BSA) thin films were preferably deposited on the most hydrophobic surfaces. More importantly, the redox properties and electrochemical impedance of PPy were closely related to the hydrophobic character of the aryl layers. This work demonstrates that diazonium compounds are unique molecular glues for conductive polymers and permit to tune their interfacial properties. With robust, diazonium-based architectured interfaces, one can design high performance materials for e.g., sensors, printed soft electronics and flexible thermoelectrics.
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10
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Kim YS, Fournier S, Lau-Truong S, Decorse P, Devillers CH, Lucas D, Harris KD, Limoges B, Balland V. Introducing Molecular Functionalities within High Surface Area Nanostructured ITO Electrodes through Diazonium Electrografting. ChemElectroChem 2018. [DOI: 10.1002/celc.201800418] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yee-Seul Kim
- Laboratoire d'Electrochimie Moléculaire, UMR CNRS 7591; Université Paris Diderot, Sorbonne Paris Cité; 15 rue J-A de Baïf F-75205 Paris Cedex 13 France
| | - Sophie Fournier
- UCMUB UMR 6302; CNRS Université Bourgogne Franche Comté; F-21000 Dijon France
| | - Stéphanie Lau-Truong
- Laboratoire ITODYS, UMR CNRS 7086; Université Paris Diderot, Sorbonne Paris Cité; 15 rue J-A de Baïf F-75205 Paris Cedex 13 France
| | - Philippe Decorse
- Laboratoire ITODYS, UMR CNRS 7086; Université Paris Diderot, Sorbonne Paris Cité; 15 rue J-A de Baïf F-75205 Paris Cedex 13 France
| | | | - Dominique Lucas
- UCMUB UMR 6302; CNRS Université Bourgogne Franche Comté; F-21000 Dijon France
| | - Kenneth D. Harris
- NRC Nanotechnology Research Center, Edmonton, Alberta T6G 2M9, Canada, & Department of Mechanical Engineering; University of Alberta; Edmonton Alberta T6G 2V4 Canada
| | - Benoît Limoges
- Laboratoire d'Electrochimie Moléculaire, UMR CNRS 7591; Université Paris Diderot, Sorbonne Paris Cité; 15 rue J-A de Baïf F-75205 Paris Cedex 13 France
| | - Véronique Balland
- Laboratoire d'Electrochimie Moléculaire, UMR CNRS 7591; Université Paris Diderot, Sorbonne Paris Cité; 15 rue J-A de Baïf F-75205 Paris Cedex 13 France
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11
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Lerond M, Bélanger D, Skene WG. Surface immobilized azomethine for multiple component exchange. SOFT MATTER 2017; 13:6639-6646. [PMID: 28926070 DOI: 10.1039/c7sm01456b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Diazonium chemistry concomitant with in situ electrochemical reduction was used to graft an aryl aldehyde to indium-tin oxide (ITO) coated glass substrates. This served as an anchor for preparing electroactive azomethines that were covalently bonded to the transparent electrode. The immobilized azomethines could undergo multiple step-wise component exchanges with different arylamines. The write-erase-write sequences were electrochemically confirmed. The azomethines could also be reversibly hydrolyzed. This was exploited for multiple azomethine-hydrolysis cycles resulting in discrete electroactive immobilized azomethines. The erase-rewrite sequences were also electrochemically confirmed.
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Affiliation(s)
- Michael Lerond
- Laboratoire de caractérisation photophysique des matériaux conjugués, Département de Chimie, Pavillon JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montréal, Québec H3C 3J7, Canada.
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12
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Quarels RD, Zhai X, Kuruppu N, Hedlund JK, Ellsworth AA, Walker AV, Garno JC, Ragains JR. Application of visible-light photosensitization to form alkyl-radical-derived thin films on gold. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:1863-1877. [PMID: 29046834 PMCID: PMC5629420 DOI: 10.3762/bjnano.8.187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 08/16/2017] [Indexed: 06/07/2023]
Abstract
Visible-light irradiation of phthalimide esters in the presence of the photosensitizer [Ru(bpy)3]2+ and the stoichiometric reducing agent benzyl nicotinamide results in the formation of alkyl radicals under mild conditions. This approach to radical generation has proven useful for the synthesis of small organic molecules. Herein, we demonstrate for the first time the visible-light photosensitized deposition of robust alkyl thin films on Au surfaces using phthalimide esters as the alkyl radical precursors. In particular, we combine visible-light photosensitization with particle lithography to produce nanostructured thin films, the thickness of which can be measured easily using AFM cursor profiles. Analysis with AFM demonstrated that the films are robust and resistant to mechanical force while contact angle goniometry suggests a multilayered and disordered film structure. Analysis with IRRAS, XPS, and TOF SIMS provides further insights.
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Affiliation(s)
- Rashanique D Quarels
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA, 70803, USA
| | - Xianglin Zhai
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA, 70803, USA
| | - Neepa Kuruppu
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA, 70803, USA
| | - Jenny K Hedlund
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Ashley A Ellsworth
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Amy V Walker
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
- Department of Materials Science, University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Jayne C Garno
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA, 70803, USA
| | - Justin R Ragains
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA, 70803, USA
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13
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Jacques A, Chehimi M, Poleunis C, Delcorte A, Delhalle J, Mekhalif Z. Grafting of 4-pyrrolyphenyldiazonium in situ generated on NiTi, an adhesion promoter for pyrrole electropolymerisation? Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Bakas I, Yilmaz G, Ait-Touchente Z, Lamouri A, Lang P, Battaglini N, Carbonnier B, Chehimi MM, Yagci Y. Diazonium salts for surface-confined visible light radical photopolymerization. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28241] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Idriss Bakas
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086; 15 Rue J-A De Baïf Paris 75013 France
- Equipe Matériaux Photocatalyse Et Environnement, Faculté Des Sciences, Université Ibn Zohr; B.P. 8106 Cité Dakhla Agadir Morocco
| | - Gorkem Yilmaz
- Department of Chemistry; Istanbul Technical University; Maslak Istanbul 34469 Turkey
| | - Zouhair Ait-Touchente
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086; 15 Rue J-A De Baïf Paris 75013 France
| | - Aazdine Lamouri
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086; 15 Rue J-A De Baïf Paris 75013 France
| | - Philippe Lang
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086; 15 Rue J-A De Baïf Paris 75013 France
| | - Nicolas Battaglini
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086; 15 Rue J-A De Baïf Paris 75013 France
| | | | - Mohamed M. Chehimi
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086; 15 Rue J-A De Baïf Paris 75013 France
- Université Paris Est, ICMPE (UMR7182), CNRS, UPEC; Thiais 94320 France
| | - Yusuf Yagci
- Department of Chemistry; Istanbul Technical University; Maslak Istanbul 34469 Turkey
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15
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Mekki A, Ait-Touchente Z, Samanta S, Singh A, Mahmoud R, Chehimi MM, Aswal DK. Polyaniline-Wrapped ZnO Nanorod Composite Films on Diazonium-Modified Flexible Plastic Substrates. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201500430] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ahmed Mekki
- Ecole Militaire Polytechnique; BP 17, Bordj El Bahri 16111 Algiers Algeria
| | - Zouhair Ait-Touchente
- Univ Paris Diderot; Sorbonne Paris Cité; ITODYS, UMR CNRS 7086; 15 rue J-A de Baïf 75013 Paris France
| | - Soumen Samanta
- Univ Paris Diderot; Sorbonne Paris Cité; ITODYS, UMR CNRS 7086; 15 rue J-A de Baïf 75013 Paris France
- Technical Physics Division; Bhabha Atomic Research Centre (BARC); Mumbai 400085 India
| | - Ajay Singh
- Univ Paris Diderot; Sorbonne Paris Cité; ITODYS, UMR CNRS 7086; 15 rue J-A de Baïf 75013 Paris France
- Technical Physics Division; Bhabha Atomic Research Centre (BARC); Mumbai 400085 India
| | - Rachid Mahmoud
- Ecole Militaire Polytechnique; BP 17, Bordj El Bahri 16111 Algiers Algeria
| | - Mohamed M. Chehimi
- Univ Paris Diderot; Sorbonne Paris Cité; ITODYS, UMR CNRS 7086; 15 rue J-A de Baïf 75013 Paris France
- Université Paris Est; ICMPE; UPEC; 2-8 rue Henri Dunant 94320 Thiais France
| | - Dinesh K. Aswal
- Technical Physics Division; Bhabha Atomic Research Centre (BARC); Mumbai 400085 India
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16
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Berisha A, Chehimi M, Pinson J, Podvorica F. Electrode Surface Modification Using Diazonium Salts. ELECTROANALYTICAL CHEMISTRY: A SERIES OF ADVANCES 2015. [DOI: 10.1201/b19196-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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17
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Kumar A, Samanta S, Singh A, Roy M, Singh S, Basu S, Chehimi MM, Roy K, Ramgir N, Navaneethan M, Hayakawa Y, Debnath AK, Aswal DK, Gupta SK. Fast Response and High Sensitivity of ZnO Nanowires-Cobalt Phthalocyanine Heterojunction Based H2S Sensor. ACS APPLIED MATERIALS & INTERFACES 2015; 7:17713-17724. [PMID: 26225901 DOI: 10.1021/acsami.5b03652] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The room temperature chemiresistive response of n-type ZnO nanowire (ZnO NWs) films modified with different thicknesses of p-type cobalt phthalocyanine (CoPc) has been studied. With increasing thickness of CoPc (>15 nm), heterojunction films exhibit a transition from n- to p-type conduction due to uniform coating of CoPc on ZnO. The heterojunction films prepared with a 25 nm thick CoPc layer exhibit the highest response (268% at 10 ppm of H2S) and the fastest response (26 s) among all samples. The X-ray photoelectron spectroscopy and work function measurements reveal that electron transfer takes place from ZnO to CoPc, resulting in formation of a p-n junction with a barrier height of 0.4 eV and a depletion layer width of ∼8.9 nm. The detailed XPS analysis suggests that these heterojunction films with 25 nm thick CoPc exhibit the least content of chemisorbed oxygen, enabling the direct interaction of H2S with the CoPc molecule, and therefore exhibit the fastest response. The improved response is attributed to the high susceptibility of the p-n junctions to the H2S gas, which manipulates the depletion layer width and controls the charge transport.
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Affiliation(s)
| | | | | | | | | | | | - Mohmad M Chehimi
- ∥University Paris Diderot, Sorbonne Paris Cité, ITODYS, CNRS, F-75013 Paris, France
| | | | | | - M Navaneethan
- #Research Institute of Electronics, 3-5-1, Johoku, Shizuoka University, Hamamatsu, Japan
| | - Y Hayakawa
- #Research Institute of Electronics, 3-5-1, Johoku, Shizuoka University, Hamamatsu, Japan
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