TY  - JOUR
A1  - Malyar, Ivan V.
A1  - Gorin, Dmitry A.
A1  - Santer, Svetlana
A1  - Stetsyura, Svetlana V.
T1  - Photo-assisted adsorption of gold nanoparticles onto a silicon substrate
JF  - Applied physics letters
N2  - We report on a photo-assisted adsorption of gold nanoparticles on a silicon substrate studied using atomic-force microscopy and secondary ion mass-spectrometry. Depending on a silicon conductivity type (n-Si or p-Si), the amount of photo-assisted adsorbed gold nanoparticles either increases (n-Si) or decreases (p-Si) on irradiation. In addition, the impacts of a cationic polyelectrolyte monolayer and adsorption time were also revealed. The polyelectrolyte layer enhances the adsorption of the gold nanoparticles but decreases the influence of light. The results of the photo-assisted adsorption on two types of silicon wafer were explained by electron processes at the substrate/solution interface.
This work was supported by the German-Russian Interdisciplinary Science Center (G-RISC) funded by the German Federal Foreign Office via the German Academic Exchange Service (DAAD), Project No. P-2014b-1, and Russian foundation for basic research, Project No. 16-08-00524_a.
Y1  - 2017
U6  - https://doi.org/10.1063/1.4979082
SN  - 0003-6951
SN  - 1077-3118
VL  - 110
PB  - American Institute of Physics
CY  - Melville
ER  - 
TY  - JOUR
A1  - Malyar, Ivan V.
A1  - Santer, Svetlana
A1  - Stetsyura, Svetlana V.
T1  - The effect of illumination on the parameters of the polymer layer deposited from solution onto a semiconductor substrate
JF  - Technical physics letters : letters to the Russian journal of applied physics
N2  - The effect of illumination on the thickness and roughness of monolayers of polycationic molecules of polyethyleneimine deposited from solution onto a silicon substrate was discovered and investigated. The super-bandgap illumination of the substrate during polyethyleneimine adsorption causes a decrease in both the roughness and integral thickness of the organic layer on n- and p-Si substrates.
Y1  - 2013
U6  - https://doi.org/10.1134/S1063785013070183
SN  - 1063-7850
VL  - 39
IS  - 7
SP  - 656
EP  - 659
PB  - Pleiades Publ.
CY  - New York
ER  - 
TY  - JOUR
A1  - Malyar, Ivan V.
A1  - Gorin, Dmitry A.
A1  - Santer, Svetlana
A1  - Stetsyura, Svetlana V.
T1  - Photocontrolled Adsorption of Polyelectrolyte Molecules on a Silicon Substrate
JF  - Langmuir
N2  - We report on a change in the properties of monomolecular films of polyelectrolyte molecules, induced by illuminating the silicon substrate on which they adsorb. It was found that under illumination the thickness of the adsorbed layer decreases by at least 27% and at the same time the roughness is significantly reduced in comparison to a layer adsorbed without irradiation. Furthermore, the homogeneity of the film topography and the surface potential is shown to be improved by illumination. The effect is explained by a change in surface charge density under irradiation of n- and p-type silicon wafers. The altered charge density in turn induces conformational changes of the adsorbing polyelectrolyte molecules. Their photocontrolled adsorption opens new possibilities for selective manipulation of adsorbed films. This possibility is of potential importance for many applications such as the production of well-defined coatings in biosensors or microelectronics.
Y1  - 2013
U6  - https://doi.org/10.1021/1a403838n
SN  - 0743-7463
VL  - 29
IS  - 32
SP  - 16058
EP  - 16065
PB  - American Chemical Society
CY  - Washington
ER  -