Modification of copper and copper oxide surface states due to isopropyl alcohol treatment toward area-selective processes

2021 ◽  
Vol 39 (1) ◽  
pp. 013403
Author(s):  
Takezo Mawaki ◽  
Akinobu Teramoto ◽  
Katsutoshi Ishii ◽  
Yoshinobu Shiba ◽  
Rihito Kuroda ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Isopropyl Alcohol ◽  
Surface States ◽  
Alcohol Treatment ◽  
Oxide Surface

X-ray photoelectron spectroscopy study of the interaction of methanol with polycrystalline copper oxide surface

1996 ◽  
Vol 11 (7) ◽  
pp. 1605-1608 ◽  
Author(s):  
S. Badrinarayanan ◽  
A. B. Mandale ◽  
S. R. Sainkar
Keyword(s):  
Copper Oxide ◽  
Photoelectron Spectroscopy ◽  
Low Dose ◽  
Dissociative Adsorption ◽  
Methanol Decomposition ◽  
Oxide Surface ◽  
Polycrystalline Copper ◽  
Spectroscopy Study ◽  
Methanol Vapor ◽  
X Ray

Methanol decomposition on a clean polycrystalline copper oxide surface was studied by x-ray photoelectron spectroscopy (XPS). Methanol was adsorbed at 133 K and desorbed over a broad temperature range. When CuO was exposed to a very low dose of methanol vapor, dissociative adsorption takes place, leading to the formation of CH3O and H2O. This is attributed to the presence of preadsorbed oxygen on the CuO surface.

ATR Spectroscopic Study of PMMA/PDMS Graft Copolymers Using a Barrier Layer Method

1995 ◽  
Vol 49 (4) ◽  
pp. 513-519 ◽  
Author(s):  
Eva Marand ◽  
L. Mike Smartt
Keyword(s):  
Thin Films ◽  
Copper Oxide ◽  
Spectroscopic Study ◽  
Penetration Depth ◽  
Barrier Layer ◽  
Graft Copolymers ◽  
Oxide Surface ◽  
Concentration Profiles ◽  
Oxide Interface ◽  
Layer Method

The use of an intermediate barrier layer to vary the penetration depth in an ATR experiment is investigated. Both theoretical and experimental results suggest that this method may be useful in probing concentration profiles away from the interface, particularly in the case of thin films, where variable-angle methods have limitations. Application of this technique in the study of poly(methylmethacrylate)/poly(dimethylsiloxane) (PMMA/PDMS) graft copolymers deposited onto a copper oxide surface indicates a preferential presence of the siloxane component at the oxide interface, a concentration which tends to decrease with increasing distance into the bulk of the sample film.

Electrically Tunable Ultra-specific Zinc Oxide Biosensor

2015 ◽  
Vol 1720 ◽  
Author(s):  
Rujuta D. Munje ◽  
Andi Wangzhou ◽  
Anjan Panneer Selvam ◽  
Sriram Muthukumar ◽  
Shalini Prasad
Keyword(s):  
Zinc Oxide ◽  
Electrochemical Impedance ◽  
Surface States ◽  
Green Emission ◽  
High Specificity ◽  
Oxide Surface ◽  
Surface Binding ◽  
Fluorescence Studies ◽  
Enhanced Sensitivity ◽  
Study Results

ABSTRACTZinc oxide surface states can be utilized for ultra-specific detection of biomolecules. The major challenges in using ZnO for bio-sensing are attaining enhanced sensitivity and specificity. In this study, we explore the functionalization of zinc in ZnO through utilizing the thiol bond. The purpose of this study is to demonstrate that the ZnO based sensor is capable of achieving high specificity in presence of competitive surface binding through the thiol bond. The final goal is to design an ultra-specific biosensor to detect low occurring biomolecules. In this study, we have selected cortisol as a stress marker to demonstrate quantification and detection from synthetic sweat. In order to demonstrate ultra-specificity, we have used two competitive thiol based molecules binding to zinc, a linker Dithiobis succinimidyl propionate (DSP) and reducing agent of DSP, Dithiothreitol (DTT). Electrochemical impedance spectroscopy (EIS) is used to quantify the signal obtained through various ratiometric concentrations of DSP and DTT. To validate the EIS study results, inherent fluorescence studies are done by mapping changes in green emission spectrum of ZnO before and after linker functionalization. The optimal combination in terms of highest signal is identified to be of 25mM DTT and 50mM DSP. This is implemented in the experiments performed to calibrate the cortisol concentration in synthetic sweat. This study demonstrates the detection of cortisol antigen in synthetic sweat present within the physiological levels of 8 ng/mL to 140 ng/mL.

A computational exploration of CO2 reduction via CO dimerization on mixed-valence copper oxide surface

2018 ◽  
Vol 20 (25) ◽  
pp. 16906-16909 ◽  
Author(s):  
Chun-Chih Chang ◽  
Elise Y. Li ◽  
Ming-Kang Tsai
Keyword(s):  
Copper Oxide ◽  
Mixed Valence ◽  
Co2 Reduction ◽  
Electron Localization Function ◽  
Oxide Surface ◽  
Electron Localization ◽  
Localization Function ◽  
Computational Exploration

The electron-localization function plots of OCCO adsorbed on Ov–CuO(111), Ov–Cu4O3(202) and Cu2O(111) surfaces.

Rheological properties of polymer chains at a copper oxide surface: Impact of the chain length, surface coverage, and grafted polymer shape

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
José G. Solano Canchaya ◽  
Germain Clavier ◽  
Sébastien Garruchet ◽  
Benoit Latour ◽  
Nicolas Martzel ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Rheological Properties ◽  
Chain Length ◽  
Surface Coverage ◽  
Polymer Chains ◽  
Oxide Surface ◽  
Grafted Polymer ◽  
Polymer Shape

Synthesis of Ceria-Coated Copper Oxide Particles for Direct Hydrocarbon SOFCs Anode

2006 ◽  
Vol 510-511 ◽  
pp. 1118-1121
Author(s):  
Jun Lee ◽  
Seung Hun Lee ◽  
Eun A Lee ◽  
Hae Jin Hwang
Keyword(s):  
Copper Oxide ◽  
Precursor Solution ◽  
Cerium Nitrate ◽  
Precipitation Method ◽  
Oxide Surface ◽  
Process Conditions ◽  
Nitrate Hexahydrate ◽  
Oxide Powders ◽  
Oxide Particles ◽  
20 Nm

Ceria-coated copper oxide powders were prepared by the precipitation method using cerium nitrate hexahydrate and ammonia as a precipitant. Heterogeneous nucleation and growth of ceria took place on the copper oxide surface by dispersing the copper oxide particles in cerium nitrate aqueous solution and subsequently adding ammonia into it. Process conditions such as the pH of the precursor solution and precipitation temperatures were carefully controlled for the homogeneous precipitation of ceria particles. It was found that copper oxide was homogeneously coated with nano-sized (~20 nm) ceria particles at room temperature. The morphology of ceria and ceria-coated copper oxide powder were examined by field-emission scanning electron microscopy (FE-SEM) as a function of precipitation temperature.

Polar zinc oxide surface in electrolyte solutions; an atomic view of reconstruction, hydration and surface states

2021 ◽  
Author(s):  
Yudai Samejima ◽  
Naritaka Kobayashi ◽  
Sei-ichiro Nakabayashi
Keyword(s):  
Electrochemical Method ◽  
Ph Dependence ◽  
Surface States ◽  
Electrolyte Solutions ◽  
Atomic Resolution ◽  
Oxide Surface ◽  
Stabilization Mechanism ◽  
Liquid Environment ◽  
Force Microscopy ◽  
Atomic Force

Stabilization mechanism of the Zn-terminated (Zn-) ZnO(0001) surface in electrolyte solutions has been investigated by using atomic-resolution liquid-environment atomic force microscopy (AFM) and electrochemical method. Electrochemically measured pH dependence of...

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