scholarly journals Gold nanostructures sputtered on zinc oxide thin film and corning glass substrates

2016 ◽  
Vol 29 (1) ◽  
pp. 77-88 ◽  
Author(s):  
Ondrej Szabó ◽  
Soňa Flickyngerová ◽  
Teodora Ignat ◽  
Ivan Novotný ◽  
Vladimír Tvarozek
Keyword(s):  
Power Density ◽  
Deposition Rate ◽  
Transparent Conductive Oxide ◽  
Oxide Thin Film ◽  
Glass Substrates ◽  
Corning Glass ◽  
Sputtering Power ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Imagej Software

Forming of Au nanostructures on Corning glass substrates and transparent conductive oxide ZnO:Al thin films by the RF diode sequential sputtering is presented. The morphology of Au structures was analysed by scanning electron microscopy (SEM) with the free ImageJ software, the optical properties were evaluated by UV-Vis spectrometry and micro-Raman spectroscopy. The sputtering power density (deposition rate) and nominal Au thickness caused changes in the sizes (10 - 1000 nm2) and nearest neighbour NN distances (4 - 40 nm) of Au nanostructures. The morphology of nanostructures exhibited the LogNormal distribution of the size of nanostructures. The lowest sputtering power density/deposition rate (9 mW/mm2/0.12 nm s-1) was optimal to get both the high optical transparency and a superior activity surface-enhanced Raman scattering of 11-mercaptoundecanoic acid adsorbed on the Au/ZnO:Al film.

Microcrystalline Silicon Growth: Deposition Rate Limiting Factors

1998 ◽  
Vol 507 ◽  
Author(s):  
S. Hamma ◽  
D. Colliquet ◽  
P. Rocai Cabarrocas
Keyword(s):  
Deposition Rate ◽  
Hydrogen Plasma ◽  
Limiting Factors ◽  
Layer By Layer ◽  
Microcrystalline Silicon ◽  
Glass Substrates ◽  
Hydrogen Dilution ◽  
Corning Glass ◽  
Silicon Growth

ABSTRACTMicrocrystalline silicon films were deposited on corning glass substrates both by the standard hydrogen dilution and the layer-by-layer (LBL) technique. In-situ UV-visible spectroscopic ellipsometry measurements were performed to analyze the evolution of the composition of the films.The change of the hydrogen plasma conditions by increasing the pressure in the LBL process leads to a faster kinetic of crystallization and to an increase of the deposition rate by a factor of two. The increase of the pressure and the decrease of the inter-electrode distance allowed to increase the deposition rate from 0.26 to 3 Å/s in the hydrogen dilution technique. Interestingly enough, the crystalline fraction of the films remains higher than 50%. However, as the deposition rate increases the growth process results in a slower kinetic of crystallization with a long range evolution of the film composition (up to 0.5 νm).

Development of a highly transparent, low-resistance lithium-doped nickel oxide triple-layer film deposited by magnetron sputtering

2017 ◽  
Vol 53 (10) ◽  
pp. 1634-1637 ◽  
Author(s):  
Chia-Ching Wu ◽  
Wei-Chen Shih
Keyword(s):  
Thin Film ◽  
Magnetron Sputtering ◽  
Radio Frequency ◽  
Nickel Oxide ◽  
Transparent Conductive Oxide ◽  
Rf Magnetron Sputtering ◽  
Oxide Thin Film ◽  
Glass Substrates ◽  
Triple Layer ◽  
Conductive Oxide

This research presents a triple-layer transparent conductive oxide thin film, with a lithium-doped nickel oxide/silver/lithium-doped nickel oxide (L-NiO/Ag/L-NiO) structure using radio-frequency (RF) magnetron sputtering on glass substrates.

scholarly journals Assessing the plasmonics of gold nano-triangles with higher order laser modes

2012 ◽  
Vol 3 ◽  
pp. 674-683 ◽  
Author(s):  
Laura E Hennemann ◽  
Andreas Kolloch ◽  
Andreas Kern ◽  
Josip Mihaljevic ◽  
Johannes Boneberg ◽  
...  
Keyword(s):  
Electric Field ◽  
Optical Microscope ◽  
Higher Order ◽  
Glass Substrates ◽  
Sers Substrates ◽  
Laser Focus ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Laser Modes

Regular arrays of metallic nano-triangles – so called Fischer patterns – are fabricated by nano-sphere lithography. We studied such gold nano-triangle arrays on silicon or glass substrates. A series of different samples was investigated with a parabolic mirror based confocal microscope where the sample is scanned through the laser focus. By employing higher order laser modes (azimuthally and radially polarised laser beams), we can excite the Fischer patterns using either a pure in-plane (x,y) electric field or a strongly z-directional (optical axis of the optical microscope) electric field. We collected and evaluated the emitted luminescence and thereby investigated the respectively excited plasmonic modes. These varied considerably: firstly with the light polarisation in the focus, secondly with the aspect ratio of the triangles and thirdly with the employed substrate. Moreover, we obtained strongly enhanced Raman spectra of an adenine (sub-)monolayer on gold Fischer patterns on glass. We thus showed that gold Fischer patterns are promising surface-enhanced Raman scattering (SERS) substrates.

SURFACE-ENHANCED RAMAN SCATTERING ACTIVITY OF PLASMONIC Ag–Ti NANOISLAND FILMS

2021 ◽  
Author(s):  
WUTTICHAI PHAE-NGAM ◽  
TANATTHA RATTANA ◽  
SUPPHADATE SUJINNAPRAM ◽  
CHANUNTHORN CHANANONNAWATHORN ◽  
URAIWAN WAIWIJIT ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Noble Metals ◽  
Film Growth ◽  
Surface Enhanced Raman Scattering ◽  
Peak Shift ◽  
Localized Surface Plasmon ◽  
Sputtering Power ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Bimetallic nanostructure of noble metals is an alternative material that can provide the tenability of plasmonic performance. In this study, the plasmonic silver–titanium nanoisland (Ag–Ti NI) films deposited on a silicon wafer and glass slide substrates were prepared by magnetron co-sputtering of high-purity Ag target (99.99%) operated at 100 W-DC source, and Ti target (99.99%) operated at 50–250 W-DC pulsed source. The surface morphologies of the prepared films revealed a noncontinuous island Ag–Ti according to the formation of thin film growth based on the Volmer–Weber model. An increase in the sputtering power of the Ti target caused an evident increase in the Ag–Ti NIs diameter. The localized surface plasmon resonance (LSPR) was evaluated by UV–Vis–NIR spectrophotometry. The LSPR peak shift disappears with an increase of the sputtering power of the Ti target.In addition, the results confirmed that the surface-enhanced Raman scattering (SERS) activity of the bimetallic Ag–Ti NIs significantly improved in performance and stability, which is promising for the application in analytical chemistry.

scholarly journals Improved Charge Transfer Contribution by Cosputtering Ag and ZnO

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1455 ◽  
Author(s):  
Bingbing Han ◽  
Shuang Guo ◽  
Sila Jin ◽  
Eungyeong Park ◽  
Xiangxin Xue ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Carrier Density ◽  
Zno Film ◽  
Free Electrons ◽  
Polystyrene Microsphere ◽  
Sputtering Power ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Ag Film

A two-dimensional polystyrene microsphere array cosputtered with Ag and ZnO was designed for evaluating surface-enhanced Raman scattering (SERS) activity. The surface plasmon resonance (SPR) and SERS properties were significantly changed by the introduction of ZnO into the Ag film. By increasing the Ag sputtering power, a redshift of the SPR peak was obtained. Moreover, improved SERS activity occurred because of the electromagnetic (EM) contribution from the increasing Ag content and the charge transfer (CT) contribution from the introduction of ZnO. More importantly, the Hall effect was employed to evaluate the carrier density effect on the SERS contribution of the Ag/ZnO film. The increase in the carrier density as the Ag sputtering power increased indicated an increasing number of free electrons stored in the Ag/ZnO film, which was accompanied by improved EM and CT contributions.

Formation and Molecular Sensing Property of Silver Nanoparticles from Sputtered Silver Oxide Layers

2005 ◽  
Vol 876 ◽  
Author(s):  
Makoto Fujimaki ◽  
Yasuhiko Iwanabe ◽  
Koichi Awazu ◽  
Junji Tominaga
Keyword(s):  
Silver Nanoparticles ◽  
Thermal Annealing ◽  
Silver Oxide ◽  
Laser Light ◽  
Oxide Thin Film ◽  
Oxide Layers ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Higher Temperature

AbstractSurface-enhanced Raman scattering (SERS) efficiency of silver nanoparticles formed by laser irradiation or thermal annealing in sputtered silver oxide layers was examined. Silver nanoparticles formed by irradiation of He-Ne laser light (632.8 nm) to a sputtered silver oxide thin film thermally annealed at 300°C show good SERS, while silver nanoparticles formed by thermal annealing at 600°C scarcely show SERS. From these results, it is deduced that thermal annealing at a proper temperature results in formation of silver nuclei that can be precursors of silver nanoparticles with desirable sizes to induce the SERS, while thermal annealing at a higher temperature results in the formation of large silver particles that no longer cause the SERS.

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