Search Results - "Ashwell, Geoffrey J."

Improved Molecular Rectification from Self-Assembled Monolayers of a Sterically Hindered Dye by Ashwell, Geoffrey J, Mohib, Abdul

“…Self-assembled monolayers (SAMs) formed from the reaction of 1-(10-acetylsulfanyldecyl)-4-{2-(4-dimethylaminonaphthalen-1-yl)-vinyl}-quinolinium iodide (1a)…”
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Molecular Rectification:  Self-Assembled Monolayers in Which Donor−(π-Bridge)−Acceptor Moieties Are Centrally Located and Symmetrically Coupled to Both Gold Electrodes by Ashwell, Geoffrey J, Tyrrell, Wayne D, Whittam, Anne J

“…Self-assembled monolayers (SAMs) obtained from 1-(10-acetylsulfanyldecyl)-4-[2-(4-dimethylaminophenyl)vinyl]quinolinium iodide exhibit asymmetric…”
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In Situ Stepwise Synthesis of Functional Multijunction Molecular Wires on Gold Electrodes and Gold Nanoparticles by Ashwell, Geoffrey J, Urasinska-Wojcik, Barbara, Phillips, Laurie J

“…Tunneling through: The sequencing of electron‐donating and electron‐accepting components that are separated by a σ‐electron bridge has resulted in the highest…”
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Synthesis of Covalently Linked Molecular Bridges between Silicon Electrodes in CMOS-Based Arrays of Vertical Si/SiO2/Si Nanogaps by Ashwell, Geoffrey J., Phillips, Laurie J., Robinson, Benjamin J., Barnes, Susan A., Williams, Aled T., Urasinska-Wojcik, Barbara, Lambert, Colin J., Grace, Iain M., Cox, Timothy I., Sage, Ian C.

“…Silicon nanogaps were bridged in situ by grafting 4‐ethynylbenzaldehyde to activate the electrodes and coupling 2,6‐diaminoanthra‐9,10‐quinone to link the…”
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Molecular rectification: Confirmation of its molecular origin by chemical suppression of the electrical asymmetry by Ashwell, Geoffrey J., Mohib, Abdul, Collins, Christopher J., Aref, Amirreza

“…Bis[ N-(ω-decyl)-5-(4-dimethylaminonaphthalen-1-yl-methylene)]-5,6,7,8-tetrahydroisoquin-olinium]-disulfide diiodide forms self-assembled monolayers (SAMs) on…”
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Molecules that mimic Schottky diodes by Ashwell, Geoffrey J, Urasinska, Barbara, Tyrrell, Wayne D

“…Self-assembled monolayers of cationic donor-(pi-bridge)-acceptor dyes coupled with anionic donors exhibit asymmetric current-voltage (I-V) characteristics when…”
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Non-centrosymmetry and second-harmonic generation in Z-type Langmuir-Blodgett films by Ashwell, Geoffrey J, Jackson, Paul D, Crossland, Wendy A

“…An alternative strategy for achieving macroscopic non-centrosymmetric order in Langmuir-Blodgett multilayers is demonstrated. It is found that the addition of…”
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Single-molecule electrical studies on a 7 nm long molecular wire by Ashwell, Geoffrey J, Urasinska, Barbara, Wang, Changsheng, Bryce, Martin R, Grace, Iain, Lambert, Colin J

“…A self-assembled arylene-ethynylene molecular wire with a rigid 7 nm long backbone exhibits symmetrical current-voltage (I-V) characteristics and a…”
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Molecular Bridging of Silicon Nanogaps by Ashwell, Geoffrey J, Phillips, Laurie J, Robinson, Benjamin J, Urasinska-Wojcik, Barbara, Lambert, Colin J, Grace, Iain M, Bryce, Martin R, Jitchati, Rukkiat, Tavasli, Mustafa, Cox, Timothy I, Sage, Ian C, Tuffin, Rachel P, Ray, Shona

“…The highly doped electrodes of a vertical silicon nanogap device have been bridged by a 5.85 nm long molecular wire, which was synthesized in situ by grafting…”
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Self-Assembly of Amino−Thiols via Gold−Nitrogen Links and Consequence for in situ Elongation of Molecular Wires on Surface-Modified Electrodes by Ashwell, Geoffrey J, Williams, Aled T, Barnes, Susan A, Chappell, Sarah L, Phillips, Laurie J, Robinson, Benjamin J, Urasinska-Wojcik, Barbara, Wierzchowiec, Piotr, Gentle, Ian R, Wood, Barry J

“…The stepwise synthesis of molecular wires on goldnanoparticles and gold electrodes has been performed using amino-terminated and aldehyde-terminated thiols as…”
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Synthesis and Properties of Functionalized 4 nm Scale Molecular Wires with Thiolated Termini for Self-Assembly onto Metal Surfaces by Wang, Changsheng, Bryce, Martin R, Gigon, Joanna, Ashwell, Geoffrey J, Grace, Iain, Lambert, Colin J

“…We report the synthesis of new oligo(aryleneethynylene) molecular wires of ca. 4 nm length scale by palladium-catalyzed Sonogashira cross-coupling methodology…”
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Unimolecular Electrical Rectification in Hexadecylquinolinium Tricyanoquinodimethanide by Metzger, Robert M, Chen, Bo, Höpfner, Ulf, Lakshmikantham, M. V, Vuillaume, Dominique, Kawai, Tsuyoshi, Wu, Xiangli, Tachibana, Hiroaki, Hughes, Terry V, Sakurai, Hiromi, Baldwin, Jeffrey W, Hosch, Christina, Cava, Michael P, Brehmer, Ludwig, Ashwell, Geoffrey J

“…Macroscopic and nanoscopic current−voltage measurements reveal asymmetries in the DC electrical conductivity through Langmuir−Blodgett multilayers and even…”
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Modification of the refractive index response of long period gratings using thin film overlays by Ishaq, Imran M., Quintela, Antonio, James, Stephen W., Ashwell, Geoffrey J., Lopez-Higuera, José M., Tatam, Ralph P.

“…The response of a fibre optic long period grating (LPG) to the surrounding refractive index is shown to be modified by the deposition of a thin film of…”
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Synthesis and Properties of Functionalized Oligo(arylene) Molecular Wires with Thiolated Termini: Competing Thiol-Au and Nitro-Au Assembly by Zeng, Xianshun, Wang, Changsheng, Batsanov, Andrei S, Bryce, Martin R, Gigon, Joanna, Urasinska-Wojcik, Barbara, Ashwell, Geoffrey J

“…We report the synthesis by Suzuki cross-coupling methodology of oligo(arylene) molecular wires with protected thiolates at both termini and a central…”
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Characterization and Conductivity of Langmuir–Blodgett Films Prepared from an Amine-Substituted Oligo(phenylene ethynylene) by Villares, Ana, Lydon, Donocadh P, Low, Paul J, Robinson, Benjamin J, Ashwell, Geoffrey J, Royo, Félix M, Cea, Pilar

“…This paper reports the assembly of well-defined molecular films from 4-[4-(4-hexyloxyphenylethynyl)-phenylethynyl]-aniline (HBPEB amine), an oligomeric…”
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In Situ Spectroscopic Characterization of Rectifying Molecular Monolayers Self-Assembled on Gold by Girlando, Alberto, Sissa, Cristina, Terenziani, Francesca, Painelli, Anna, Chwialkowska, Anna, Ashwell, Geoffrey J.

“…We report visible, Raman, and infrared spectra of self‐assembled monolayers (SAMs) formed by the donor‐(π‐bridge)‐acceptor chromophore,…”
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Improved Second Harmonic Generation from Langmuir-Blodgett Monolayers of an Ionically Combined Bis-chromophore Zinc Complex by Zhou, Dejian, Ashwell, Geoffrey J, Huang, Chunhui

“…Strong second harmonic generation (SHG) from LB monolayers of a new ionically combined nonlinear optical bis-chromophore zinc complex,…”
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Rectification and Nonlinear Optical Properties of a Langmuir−Blodgett Monolayer of a Pyridinium Dye by Baldwin, Jeffrey W, Amaresh, Ramiya R, Peterson, Ian R, Shumate, Walter J, Cava, Michael P, Amiri, Mukhtar A, Hamilton, Richard, Ashwell, Geoffrey J, Metzger, Robert M

“…Rectification was observed across a monolayer of 2,6-di[dibutylamino-phenylvinyl]-1-butylpyridinium iodide, (Bu2NφV)2BuPy+I-, 1 sandwiched between gold…”
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Functional molecular wires by Ashwell, Geoffrey J, Wierzchowiec, Piotr, Phillips, Laurie J, Collins, Christopher J, Gigon, Joanna, Robinson, Benjamin J, Finch, Christopher M, Grace, Ian R, Lambert, Colin J, Buckle, Philip D, Ford, Kym, Wood, Barry J, Gentle, Ian R

“…The properties of self-assembled molecules may be tuned by sequentially coupling components on a gold surface, the molecular electronics toolbox of chemically…”
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Langmuir–Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene–ethynylene) derivatives by Villares, Ana, Lydon, Donocadh P., Robinson, Benjamin J., Ashwell, Geoffrey J., Royo, Félix M., Low, Paul J., Cea, Pilar

“…Langmuir and Langmuir–Blodgett (LB) films of two “wire-like” oligo(phenylene–ethynylene) methyl ester derivatives, namely…”
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