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Marri I, Amato M, Bertocchi M, Ferretti A, Varsano D, Ossicini S. Surface chemistry effects on work function, ionization potential and electronic affinity of Si(100), Ge(100) surfaces and SiGe heterostructures. Phys Chem Chem Phys 2020; 22:25593-25605. [PMID: 33164017 DOI: 10.1039/d0cp04013d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We combine density functional theory and many body perturbation theory to investigate the electronic properties of Si(100) and Ge(100) surfaces terminated with halogen atoms (-I, -Br, -Cl, -F) and other chemical functionalizations (-H, -OH, -CH3) addressing the absolute values of their work function, electronic affinity and ionization potential. Our results point out that electronic properties of functionalized surfaces strongly depend on the chemisorbed species and much less on the surface crystal orientation. The presence of halogens at the surface always leads to an increment of the work function, ionization potential and electronic affinity with respect to fully hydrogenated surfaces. On the contrary, the presence of polar -OH and -CH3 groups at the surface leads to a reduction of the aforementioned quantities with respect to the H-terminated system. Starting from the work functions calculated for the Si and Ge passivated surfaces, we apply a simple model to estimate the properties of functionalized SiGe surfaces. The possibility of modulating the work function by changing the chemisorbed species and composition is predicted. The effects induced by different terminations on the band energy line-up profile of SiGe surfaces are then analyzed. Interestingly, our calculations predict a type-II band offset for the H-terminated systems and a type-I band offset for the other cases.
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Affiliation(s)
- Ivan Marri
- Department of Sciences and Methods for Engineering, University of Modena e Reggio Emilia, 42122 Reggio Emilia, Italy.
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2
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Laurans M, Dalla Francesca K, Volatron F, Izzet G, Guerin D, Vuillaume D, Lenfant S, Proust A. Molecular signature of polyoxometalates in electron transport of silicon-based molecular junctions. NANOSCALE 2018; 10:17156-17165. [PMID: 30187072 DOI: 10.1039/c8nr04946g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Polyoxometalates (POMs) are unconventional electro-active molecules with a great potential for applications in molecular memories, providing efficient processing steps onto electrodes are available. The synthesis of the organic-inorganic polyoxometalate hybrids [PM11O39{Sn(C6H4)C[triple bond, length as m-dash]C(C6H4)N2}]3- (M = Mo, W) endowed with a remote diazonium function is reported together with their covalent immobilization onto hydrogenated n-Si(100) substrates. Electron transport measurements through the resulting densely-packed monolayers contacted with a mercury drop as a top electrode confirms their homogeneity. Adjustment of the current-voltage curves with the Simmon's equation gives a mean tunnel energy barrier ΦPOM of 1.8 eV and 1.6 eV, for the Silicon-Molecules-Metal (SMM) junctions based on the polyoxotungstates (M = W) and polyoxomolybdates (M = Mo), respectively. This follows the trend observed in the electrochemical properties of POMs in solution, the polyoxomolybdates being easier to reduce than the polyoxotungstates, in agreement with lowest unoccupied molecular orbitals (LUMOs) of lower energy. The molecular signature of the POMs is thus clearly identifiable in the solid-state electrical properties and the unmatched diversity of POM molecular and electronic structures should offer a great modularity.
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Affiliation(s)
- Maxime Laurans
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France.
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3
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Affiliation(s)
- Bruno Fabre
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS/Université de Rennes 1, Matière Condensée et Systèmes Electroactifs MaCSE, 35042 Rennes Cedex, France
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4
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Davidson R, Al-Owaedi OA, Milan DC, Zeng Q, Tory J, Hartl F, Higgins SJ, Nichols RJ, Lambert CJ, Low PJ. Effects of Electrode–Molecule Binding and Junction Geometry on the Single-Molecule Conductance of bis-2,2′:6′,2″-Terpyridine-based Complexes. Inorg Chem 2016; 55:2691-700. [DOI: 10.1021/acs.inorgchem.5b02094] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ross Davidson
- Department of Chemistry, Durham University, South
Rd, Durham, DH1 3LE, United Kingdom
| | - Oday A. Al-Owaedi
- Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom
- Department of Laser Physics, Women Faculty of Science, Babylon University, Hillah, Iraq
| | - David C. Milan
- Department of Chemistry, University of Liverpool, Crown St, Liverpool, L69 7ZD, United Kingdom
| | - Qiang Zeng
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, United Kingdom
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, Peoples’ Republic of China
| | - Joanne Tory
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, United Kingdom
| | - František Hartl
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, United Kingdom
| | - Simon J. Higgins
- Department of Chemistry, University of Liverpool, Crown St, Liverpool, L69 7ZD, United Kingdom
| | - Richard J. Nichols
- Department of Chemistry, University of Liverpool, Crown St, Liverpool, L69 7ZD, United Kingdom
| | - Colin J. Lambert
- Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom
| | - Paul J. Low
- School
of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, Perth, Washington 6009, Australia
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5
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O'Donnell KM, Hedgeland H, Moore G, Suleman A, Siegl M, Thomsen L, Warschkow O, Schofield SR. Orientation and stability of a bi-functional aromatic organic molecular adsorbate on silicon. Phys Chem Chem Phys 2016; 18:27290-27299. [DOI: 10.1039/c6cp04328c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this work we combine scanning tunneling microscopy, near-edge X-ray absorption fine structure spectroscopy, X-ray photoemission spectroscopy and density functional theory to resolve a long-standing confusion regarding the adsorption behaviour of benzonitrile on Si(001) at room temperature.
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Affiliation(s)
- K. M. O'Donnell
- Department of Physics
- Astronomy and Medical Radiation Science
- Curtin University
- Bentley
- Australia
| | - H. Hedgeland
- London Centre for Nanotechnology
- University College London
- London
- UK
| | - G. Moore
- London Centre for Nanotechnology
- University College London
- London
- UK
- Department of Physics and Astronomy
| | - A. Suleman
- London Centre for Nanotechnology
- University College London
- London
- UK
- Department of Physics and Astronomy
| | - M. Siegl
- London Centre for Nanotechnology
- University College London
- London
- UK
- Department of Physics and Astronomy
| | | | - O. Warschkow
- Centre for Quantum Computation and Communication Technology
- School of Physics
- University of Sydney
- Sydney
- Australia
| | - S. R. Schofield
- London Centre for Nanotechnology
- University College London
- London
- UK
- Department of Physics and Astronomy
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6
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Chen L, Qiu S, Xiong F, Lu J, Liu P, Ding B, Li Y, Cui Y, Guo Y, Chen X. Nonadiabatic dynamics in energetic negative fluorine ions scattering from a Si(100) surface. J Chem Phys 2015; 143:114703. [PMID: 26395724 DOI: 10.1063/1.4930908] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dependence of the negative-ion fractions on incident energy and angle is reported for 8.5-22.5 keV F(-) ions scattered from a Si(100) surface at a fixed scattering angle of 38°. The negative-ion fraction increases monotonically with incident velocity for specular scattering. In particular, the variation of the fraction with incident angle is bell shaped for a given incident energy. We interpret this variation using the incident-velocity effect at short distances where the yield of negative ions depends on the number of initial neutrals. It strongly indicates that at short distances, a dynamical equilibrium population is never achieved. This nonadiabatic feature is supported by simple calculations using modified rate equations.
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Affiliation(s)
- Lin Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Shunli Qiu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Feifei Xiong
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Jianjie Lu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Pinyang Liu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Bin Ding
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yuan Li
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Ying Cui
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yanling Guo
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Ximeng Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
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7
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O'Donnell KM, Warschkow O, Suleman A, Fahy A, Thomsen L, Schofield SR. Manipulating the orientation of an organic adsorbate on silicon: a NEXAFS study of acetophenone on Si(0 0 1). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:054002. [PMID: 25414086 DOI: 10.1088/0953-8984/27/5/054002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We investigate the chemical and structural configuration of acetophenone on Si(0 0 1) using synchrotron radiation core-level spectroscopy techniques and density functional theory calculations. Samples were prepared by vapour phase dosing of clean Si(0 0 1) surfaces with acetophenone in ultrahigh vacuum. Near edge x-ray absorption fine structure spectroscopy and photoelectron spectroscopy measurements were made at room temperature as a function of coverage density and post-deposition anneal temperature. We show that the dominant room temperature adsorption structure lies flat on the substrate, while moderate thermal annealing induces the breaking of Si-C bonds between the phenyl ring and the surface resulting in the reorientation of the adsorbate into an upright configuration.
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8
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Fabre B, Pujari SP, Scheres L, Zuilhof H. Micropatterned ferrocenyl monolayers covalently bound to hydrogen-terminated silicon surfaces: effects of pattern size on the cyclic voltammetry and capacitance characteristics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7235-43. [PMID: 24885588 DOI: 10.1021/la501330j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The effect of the size of patterns of micropatterned ferrocene (Fc)-functionalized, oxide-free n-type Si(111) surfaces was systematically investigated by electrochemical methods. Microcontact printing with amine-functionalized Fc derivatives was performed on a homogeneous acid fluoride-terminated alkenyl monolayer covalently bound to n-type H-terminated Si surfaces to give Fc patterns of different sizes (5 × 5, 10 × 10, and 20 × 20 μm(2)), followed by backfilling with n-butylamine. These Fc-micropatterned surfaces were characterized by static water contact angle measurements, ellipsometry, X-ray photoelectron spectroscopy (XPS), infrared reflection-absorption spectroscopy (IRRAS), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The charge-transfer process between the Fc-micropatterned and underlying Si interface was subsequently studied by cyclic voltammetry and capacitance. By electrochemical studies, it is evident that the smallest electroactive ferrocenyl patterns (i.e., 5 × 5 μm(2) squares) show ideal surface electrochemistry, which is characterized by narrow, perfectly symmetric, and intense cyclic voltammetry and capacitance peaks. In this respect, strategies are briefly discussed to further improve the development of photoswitchable charge storage microcells using the produced redox-active monolayers.
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Affiliation(s)
- Bruno Fabre
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS/Université de Rennes 1, Matière Condensée et Systèmes Electroactifs (MaCSE) , Campus de Beaulieu, 35042 Rennes Cedex, France
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9
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Yzambart G, Fabre B, Roisnel T, Dorcet V, Ababou-Girard S, Meriadec C, Lorcy D. Assembly of Platinum Diimine Dithiolate Complexes onto Hydrogen-Terminated Silicon Surfaces. Organometallics 2014. [DOI: 10.1021/om5000369] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Gilles Yzambart
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
| | - Bruno Fabre
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
| | - Thierry Roisnel
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
| | - Soraya Ababou-Girard
- Institut de Physique de Rennes, Département
Matériaux et Nanosciences, Campus de Beaulieu, UMR 6251 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
| | - Cristelle Meriadec
- Institut de Physique de Rennes, Département
Matériaux et Nanosciences, Campus de Beaulieu, UMR 6251 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
| | - Dominique Lorcy
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, 35042 Rennes Cedex, France
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10
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Lambropoulos NA, Reimers JR, Crossley MJ, Hush NS, Silverbrook K. A multiscale simulation technique for molecular electronics: design of a directed self-assembled molecular n-bit shift register memory device. NANOTECHNOLOGY 2013; 24:505202. [PMID: 24270608 DOI: 10.1088/0957-4484/24/50/505202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A general method useful in molecular electronics design is developed that integrates modelling on the nano-scale (using quantum-chemical software) and on the micro-scale (using finite-element methods). It is applied to the design of an n-bit shift register memory that could conceivably be built using accessible technologies. To achieve this, the entire complex structure of the device would be built to atomic precision using feedback-controlled lithography to provide atomic-level control of silicon devices, controlled wet-chemical synthesis of molecular insulating pillars above the silicon, and controlled wet-chemical self-assembly of modular molecular devices to these pillars that connect to external metal electrodes (leads). The shift register consists of n connected cells that read data from an input electrode, pass it sequentially between the cells under the control of two external clock electrodes, and deliver it finally to an output device. The proposed cells are trimeric oligoporphyrin units whose internal states are manipulated to provide functionality, covalently connected to other cells via dipeptide linkages. Signals from the clock electrodes are conveyed by oligoporphyrin molecular wires, and μ-oxo porphyrin insulating columns are used as the supporting pillars. The developed multiscale modelling technique is applied to determine the characteristics of this molecular device, with in particular utilization of the inverted region for molecular electron-transfer processes shown to facilitate latching and control using exceptionally low energy costs per logic operation compared to standard CMOS shift register technology.
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Affiliation(s)
- Nicholas A Lambropoulos
- CSIRO Energy Technology, Life Sciences Centre, 11 Julius Avenue, North Ryde, NSW, 2113, Australia. School of Chemistry, The University of Sydney, Sydney, NSW, 2006, Australia
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11
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Savchenko J, Cao Z, Natoli SN, Cummings SP, Prentice BM, Fanwick PE, Ren T. New Diruthenium Bis-alkynyl Compounds as Potential Ditopic Linkers. Organometallics 2013. [DOI: 10.1021/om400799c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julia Savchenko
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Zhi Cao
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sean N. Natoli
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Steven P. Cummings
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Boone M. Prentice
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Phillip E. Fanwick
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Tong Ren
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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12
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Cummings SP, Fanwick PE, Savchenko J, Ren T. Diruthenium acetylide compounds with masked diazonium capping groups. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.07.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Moitra N, Kamei T, Kanamori K, Nakanishi K, Takeda K, Shimada T. Recyclable functionalization of silica with alcohols via dehydrogenative addition on hydrogen silsesquioxane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12243-12253. [PMID: 23977900 DOI: 10.1021/la402205j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Synthesis of class II hybrid silica materials requires the formation of covalent linkage between organic moieties and inorganic frameworks. The requirement that organosilylating agents be present to provide the organic part limits the synthesis of functional inorganic oxides, however, due to the water sensitivity and challenges concerning purification of the silylating agents. Synthesis of hybrid materials with stable molecules such as simple alcohols, rather than with these difficult silylating agents, may therefore provide a path to unprecedented functionality. Herein, we report the novel functionalization of silica with organic alcohols for the first time. Instead of using hydrolyzable organosilylating agents, we used stable organic alcohols with a Zn(II) catalyst to modify the surface of a recently discovered highly reactive macro-mesoporous hydrogen silsesquioxane (HSQ, HSiO1.5) monolith, which was then treated with water with the catalyst to form surface-functionalized silica. These materials were comprehensively characterized with FT-IR, Raman, solid-state NMR, fluorescence spectroscopy, thermal analysis, elemental analysis, scanning electron microscopy, and nitrogen adsorption-desorption measurements. The results obtained from these measurements reveal facile immobilization of organic moieties by dehydrogenative addition onto surface silane (Si-H) at room temperature with high loading and good tolerance of functional groups. The organic moieties can also be retrieved from the monoliths for recycling and reuse, which enables cost-effective and ecological use of the introduced catalytic/reactive surface functionality. Preservation of the reactivity of as-immobilized organic alcohols has been confirmed, moreover, by successfully performing copper-catalyzed azide-alkyne cycloaddition (CuAAC) "click" reactions on the immobilized silica surfaces.
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Affiliation(s)
- Nirmalya Moitra
- Department of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
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14
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Fabre B, Li Y, Scheres L, Pujari SP, Zuilhof H. Light-Activated Electroactive Molecule-Based Memory Microcells Confined on a Silicon Surface. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Fabre B, Li Y, Scheres L, Pujari SP, Zuilhof H. Light-Activated Electroactive Molecule-Based Memory Microcells Confined on a Silicon Surface. Angew Chem Int Ed Engl 2013; 52:12024-7. [DOI: 10.1002/anie.201304688] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Indexed: 11/06/2022]
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16
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Green K, Gauthier N, Sahnoune H, Halet JF, Paul F, Fabre B. Covalent Immobilization of Redox-Active Fe(κ2-dppe)(η5-C5Me5)-Based π-Conjugated Wires on Oxide-Free Hydrogen-Terminated Silicon Surfaces. Organometallics 2013. [DOI: 10.1021/om4006017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Katy Green
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus
de Beaulieu, 35042 Rennes Cedex, France
| | - Nicolas Gauthier
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus
de Beaulieu, 35042 Rennes Cedex, France
| | - Hiba Sahnoune
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus
de Beaulieu, 35042 Rennes Cedex, France
| | - Jean-François Halet
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus
de Beaulieu, 35042 Rennes Cedex, France
| | - Frédéric Paul
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus
de Beaulieu, 35042 Rennes Cedex, France
| | - Bruno Fabre
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus
de Beaulieu, 35042 Rennes Cedex, France
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17
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Green K, Gauthier N, Sahnoune H, Argouarch G, Toupet L, Costuas K, Bondon A, Fabre B, Halet JF, Paul F. Synthesis and Characterization of Redox-Active Mononuclear Fe(κ2-dppe)(η5-C5Me5)-Terminated π-Conjugated Wires. Organometallics 2013. [DOI: 10.1021/om400515g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katy Green
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Nicolas Gauthier
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Hiba Sahnoune
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Gilles Argouarch
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Loic Toupet
- Institut de Physique de Rennes,
UMR 6251 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Karine Costuas
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Arnaud Bondon
- RMN-ILP, UMR 6026 CNRS, Université de Rennes 1, IFR 140, PRISM, CS 34317,
Campus de Villejean, 35043 Rennes Cedex, France
| | - Bruno Fabre
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Jean-François Halet
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Frédéric Paul
- Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
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18
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Twists and turns: Studies of the complexes and properties of bimetallic complexes featuring phenylene ethynylene and related bridging ligands. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.08.008] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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1′-Trimethylsilylethynyl-, 1′-ethenyl- and 1′-formyl-1-ethynylferrocenes: syntheses and electrochemical properties. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Cummings SP, Savchenko J, Fanwick PE, Kharlamova A, Ren T. Diruthenium Alkynyl Compounds with Phosphonate Capping Groups. Organometallics 2013. [DOI: 10.1021/om301247w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven P. Cummings
- Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Julia Savchenko
- Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Phillip E. Fanwick
- Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Anastasia Kharlamova
- Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Tong Ren
- Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
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21
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Savchenko J, Fanwick PE, Hope H, Gao Y, Yerneni CK, Ren T. New diruthenium (II,III) compounds bearing terminal olefin groups. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.11.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tricard S, Raza Y, Mazerat S, Aissou K, Baron T, Mallah T. Sequential growth of bistable copper–molybdenum coordination nanolayers on inorganic surfaces. Dalton Trans 2013; 42:8034-40. [DOI: 10.1039/c3dt50259g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Boukari K, Sonnet P, Duverger E. DFT-D Studies of Single Porphyrin Molecule on Doped Boron Silicon Surfaces. Chemphyschem 2012; 13:3945-51. [DOI: 10.1002/cphc.201200578] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Indexed: 11/07/2022]
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24
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Cao Z, Forrest WP, Gao Y, Fanwick PE, Ren T. trans-[Fe(cyclam)(C2R)2]+: A New Family of Iron(III) Bis-Alkynyl Compounds. Organometallics 2012. [DOI: 10.1021/om300515r] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Zhi Cao
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - William P. Forrest
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yang Gao
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Phillip E. Fanwick
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Tong Ren
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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Li Y, Calder S, Yaffe O, Cahen D, Haick H, Kronik L, Zuilhof H. Hybrids of organic molecules and flat, oxide-free silicon: high-density monolayers, electronic properties, and functionalization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9920-9929. [PMID: 22587009 DOI: 10.1021/la3010568] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Since the first report of Si-C bound organic monolayers on oxide-free Si almost two decades ago, a substantial amount of research has focused on studying the fundamental mechanical and electronic properties of these Si/molecule surfaces and interfaces. This feature article covers three closely related topics, including recent advances in achieving high-density organic monolayers (i.e., atomic coverage >55%) on oxide-free Si(111) substrates, an overview of progress in the fundamental understanding of the energetics and electronic properties of hybrid Si/molecule systems, and a brief summary of recent examples of subsequent functionalization on these high-density monolayers, which can significantly expand the range of applicability. Taken together, these topics provide an overview of the present status of this active area of research.
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Affiliation(s)
- Yan Li
- Laboratory of Organic Chemistry, Wageningen University, Wageningen, The Netherlands
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26
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Yzambart G, Fabre B, Lorcy D. Multiredox tetrathiafulvalene-modified oxide-free hydrogen-terminated Si(100) surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3453-3459. [PMID: 22272686 DOI: 10.1021/la204375a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Tetrathiafulvalene (TTF) monolayers covalently bound to oxide-free hydrogen-terminated Si(100) surfaces have been prepared from the hydrosilylation reaction involving a TTF-terminated ethyne derivative. FTIR spectroscopy characterization using similarly modified porous Si(100) substrates revealed the presence of vibration bands assigned to the immobilized TTF rings and the Si-C═C- interfacial bonds. Cyclic voltammetry measurements showed the presence of two reversible one-electron systems ascribed to TTF/TTF(.+) and TTF(.+)/TTF(2+) redox couples at ca. 0.40 and 0.75 V vs SCE, respectively, which compare well with the values determined for the electroactive molecule in solution. The amount of immobilized TTF units could be varied in the range from 1.7 × 10(-10) to 5.2 × 10(-10) mol cm(-2) by diluting the TTF-terminated chains with inert n-decenyl chains. The highest coverage obtained for the single-component monolayer is consistent with a densely packed TTF monolayer.
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Affiliation(s)
- Gilles Yzambart
- Sciences Chimiques de Rennes, UMR 6226 CNRS/Université de Rennes 1, MaCSE, Campus de Beaulieu, 35042 Rennes Cedex, France
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Tricard S, Costa-Coquelard C, Volatron F, Fleury B, Huc V, Albouy PA, David C, Miserque F, Jegou P, Palacin S, Mallah T. Sequential growth in solution of NiFe Prussian blue coordination network nanolayers on Si(100) surfaces. Dalton Trans 2011; 41:1582-90. [PMID: 22159371 DOI: 10.1039/c1dt11568e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controlling the elaboration of Coordination Networks (CoNet) on surfaces at the nanoscale remains a challenge. One suitable technique is the Sequential Growth in Solution (SGS), which has the advantage to be simple, cheap and fast. We addressed two issues in this article: i) the controlled synthesis of ultra thin films of CoNet (thickness lower than 10 nm), and ii) the investigation of the influence of the precursors' concentration on the growth process. Si(100) was used because it is possible to prepare atomically flat Si-H surfaces, which is necessary for the growth of ultrathin films. We used, as a model system, the sequential reactions of K(4)[Fe(II)(CN)(6)] and [Ni(II)(H(2)O)(6)]Cl(2) that occur by the substitution of the water molecules in the coordination sphere of Ni(II) by the nitrogen atoms of ferrocyanide. We demonstrated that the nature of the deposited film depends mainly on the relative concentration of the anchoring sites versus the precursors' solution. Attenuated Total Reflection Fourier Transformed Infra Red (ATR-FTIR), X-ray reflectivity, X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscopy (AFM) were used to characterize the steps of the growth process.
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Affiliation(s)
- Simon Tricard
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS 8182, Université Paris-Sud, F-91405, Orsay, France.
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