Tailoring the Work Function of Gold Surface by Controlling Coverage and Disorder of Polar Molecular Monolayers

2008 ◽  
Vol 112 (33) ◽  
pp. 12988-12992 ◽  
Author(s):  
Nira Gozlan ◽  
Ulrike Tisch ◽  
Hossam Haick
Keyword(s):  
Work Function ◽  
Gold Surface ◽  
Molecular Monolayers

Work Function Changes of Azo-Derivatives Adsorbed on a Gold Surface

2014 ◽  
Vol 118 (45) ◽  
pp. 26033-26040 ◽  
Author(s):  
Enrico Benassi ◽  
Stefano Corni
Keyword(s):  
Work Function ◽  
Gold Surface ◽  
Azo Derivatives

Work function increase of transparent conductive electrodes by solution processed electron acceptor molecular monolayers

2013 ◽  
Vol 114 (2) ◽  
pp. 291-295 ◽  
Author(s):  
Mauro Castellani ◽  
Stefanie Winkler ◽  
Benjamin Bröker ◽  
Martin Baumgarten ◽  
Klaus Müllen ◽  
...  
Keyword(s):  
Work Function ◽  
Electron Acceptor ◽  
Solution Processed ◽  
Molecular Monolayers ◽  
Transparent Conductive Electrodes

Study of adsorption on metals by the contact potential technique

1953 ◽  
Vol 6 (2) ◽  
pp. 109 ◽  
Author(s):  
JR Anderson ◽  
AE Alexander
Keyword(s):  
Ethyl Acetate ◽  
Hysteresis Loop ◽  
Work Function ◽  
Vapour Pressure ◽  
Physical Adsorption ◽  
Surface Preparation ◽  
Gold Surface ◽  
Contact Potential ◽  
Relative Vapour Pressure ◽  
Adsorption Of Water

The change in contact potential between metals due to physical adsorption of water vapour, isopropanol, and ethyl acetate has been studied. The plot of contact potential against relative vapour pressure showed a hysteresis loop, the behaviour varying for different methods of surface preparation. An initial irreversible potential change was always found, due to chemisorption. By studying the dependence of the contact potential on the temperature of one of the metal surfaces it has been possible to determine the change in work function of a gold surface due to physical adsorption.

scholarly journals Anti-Colonization Effect of Au Surfaces with Self-Assembled Molecular Monolayers Functionalized with Antimicrobial Peptides on S. epidermidis

Antibiotics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1516
Author(s):  
Eskil André Karlsen ◽  
Wenche Stensen ◽  
Eric Juskewitz ◽  
Johan Svenson ◽  
Mattias Berglin ◽  
...  
Keyword(s):  
Antimicrobial Peptides ◽  
Medical Devices ◽  
Bacterial Colonization ◽  
Gold Surface ◽  
Healthcare Associated Infections ◽  
Model Surface ◽  
Molecular Monolayers ◽  
Self Assembled ◽  
Unit Reduction ◽  
Healthcare Associated

Medical devices with an effective anti-colonization surface are important tools for combatting healthcare-associated infections. Here, we investigated the anti-colonization efficacy of antimicrobial peptides covalently attached to a gold model surface. The gold surface was modified by a self-assembled polyethylene glycol monolayer with an acetylene terminus. The peptides were covalently connected to the surface through a copper-catalyzed [3 + 2] azide-acetylene coupling (CuAAC). The anti-colonization efficacy of the surfaces varied as a function of the antimicrobial activity of the peptides, and very effective surfaces could be prepared with a 6 log unit reduction in bacterial colonization.

Hydrogen Detection with Noble Metal-TiO2 Schottky Diodes

2011 ◽  
Vol 495 ◽  
pp. 289-293 ◽  
Author(s):  
Saeedeh Rahbarpour ◽  
Faramarz Hossein-Babaei
Keyword(s):  
Work Function ◽  
Barrier Height ◽  
Noble Metal ◽  
Schottky Diodes ◽  
Gold Surface ◽  
Silver Surface ◽  
Current Increase ◽  
Hydrogen Detection ◽  
Fast Detection ◽  
Metal Interactions

Fast detection of hydrogen at a wide concentration range is desired for many applications. We report detecting hydrogen using Au-TiO2-Ti and Ag-TiO2-Ti diodes. While hydrogen-Au and hydrogen-Ag interactions are very different, at a constant biasing voltage, the measured current in both diodes is highly sensitive to the partial pressure of hydrogen contamination in the surrounding atmosphere. Work function variations were investigated by connecting the I-V specifications to the energy barrier height established at the Au-TiO2 and Ag-TiO2 junctions. Electronic features of the devices were described based on the assumption of two different hydrogen-noble metal interactions: Hydrogen reduces Ag work function by reducing the adsorbed oxygen species from the silver surface, while Au work function is reduced by the same mechanism as well as the direct adsorption of hydrogen species to the gold surface. Both of these mechanisms result in hydrogen detection by Schottky barrier height reduction and current increase.

scholarly journals Engineering of gold surface work function by electrodeposition of spirobifluorene donor–acceptor bipolar systems

2009 ◽  
Vol 10 (7) ◽  
pp. 1307-1313 ◽  
Author(s):  
Philipp Zabel ◽  
Thomas Dittrich ◽  
Yuan-Li Liao ◽  
Chi-Yen Lin ◽  
Ken-Tsung Wong ◽  
...  
Keyword(s):  
Work Function ◽  
Gold Surface ◽  
Surface Work ◽  
Donor Acceptor ◽  
Surface Work Function

Role of Backbone Charge Rearrangement in the Bond-Dipole and Work Function of Molecular Monolayers

2011 ◽  
Vol 115 (50) ◽  
pp. 24888-24892 ◽  
Author(s):  
Tali Aqua ◽  
Hagai Cohen ◽  
Ofer Sinai ◽  
Veronica Frydman ◽  
Tatyana Bendikov ◽  
...  
Keyword(s):  
Work Function ◽  
Molecular Monolayers
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