Gamma-irradiation induced direct fabrication of SERS-active Ag nanoparticles on glass substrates

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20247-20251 ◽  
Author(s):  
Hongtao Zhao ◽  
Zhigang Li ◽  
Nan Zhang ◽  
Siwei Li ◽  
Lu Xiong ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Ag Nanoparticles ◽  
Reduction Technique ◽  
Glass Substrates ◽  
Direct Fabrication

SERS-active Ag nanoparticles are directly fabricated on glass substrates through a gamma-irradiation induced reduction technique.

THE EFFECT OF THERMAL ANNEALING AND PULSE LASER ANNEALING IN THE REDUCTION OF GRAPHENE OXIDE

2021 ◽  
Vol 5 (1) ◽  
pp. 47-56
Author(s):  
Adeyemi Owolabi ◽  
Ali Haruna ◽  
Felix Ekwuribe ◽  
Raphael Ushiekpan Ugbe ◽  
Alexander Bulus Bature ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pulse Laser ◽  
Large Scale ◽  
Laser Annealing ◽  
Thermal Reduction ◽  
Reduction Technique ◽  
Laser Method ◽  
Glass Substrates ◽  
Promising Application ◽  
Alternative Sources

The discovery of Graphene and its unique properties has attracted great interest. Unfortunately, the synthesis of graphene in large scale is challenging, for this reason the derivative of graphene such as graphene oxide (GO) and reduce graphene oxide (rGO) have become alternative sources. The reduction of graphene oxide is an alternative route to obtain graphene-like behavior. This study is aim at examining the similarities and difference between thermal reduction technique and pulse laser method of reduction of (GO). The method utilizes a pulse laser beam for reduction of GO layers on glass substrates and thermal reduction technique. Using the pulse laser method, conductivity of reduced GO was found to be 2.325E-2(1/ohm) which is six times higher than conductivity values reported for GO layers reduced by thermal means at 400oC which was 3.740E-3(1/ohm). A higher transmittance was observed for the pulse laser annealed which holds promising application in a lot technological research. The scanning electron microscope (SEM) result reveals the evenly distribution of the GO around the substrate. The non-thermal nature of the pulse laser method combined with its simplicity and scalability, makes it very attractive for the future manufacturing of large-volume graphene-based optoelectronics

Study of some Physical Properties and the Effect of Gamma Irradiation on Optical Properties of Electrochromic Co3O4 Thin Film

2021 ◽  
Vol 1021 ◽  
pp. 107-114
Author(s):  
Buthainah A. Ibrahim ◽  
Ziad T. Khodiar ◽  
Marwan M. Farhan
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Gamma Irradiation ◽  
Cobalt Chloride ◽  
Optical Band Gap ◽  
Uv Spectroscopy ◽  
Oxide Thin Film ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Chemical Spray

Cobalt oxide thin film (Co3O4) has been prepared from cobalt chloride with distilled water on conducting glass substrates Fluorine doped Tin Oxide (FTO) at (400ºC) by depositing chemical spray pyrolysis, with thickness (200 nm). The structural properties are studied by XRD. Also, optical properties and electrical properties of Co3O4 thin film are studied by UV spectroscopy and Cyclic voltammetry (CV) respectively. The effects of gamma irradiation on optical properties are also examined. XRD results showed that the film was polycrystalline with cubic structure having preferred orientation (111). The as-prepared Co3O4 film exhibits a noticeable EC behaviour with reversible colour which changes from dark grey to pale yellow with bleaching time (55 s) and colouring time (40 s). After irradiation, the optical properties showed that as the transmittance decrease leads to decrease the direct optical band gap from (3.68eV) to (3.55eV)

Gamma-irradiation assisted seeded growth of Ag nanoparticles within PVA matrix

2011 ◽  
Vol 128 (1-2) ◽  
pp. 109-113 ◽  
Author(s):  
Wael H. Eisa ◽  
Yasser K. Abdel-Moneam ◽  
Yasser Shaaban ◽  
Atef A. Abdel-Fattah ◽  
Amira M. Abou Zeid
Keyword(s):  
Gamma Irradiation ◽  
Ag Nanoparticles ◽  
Seeded Growth

Electrical Contact Characteristics between Silicon Micropillars and Ag Nanoparticles with Controlled Mechanical Load

2012 ◽  
Vol 1429 ◽  
Author(s):  
VJ Logeeswaran ◽  
Mark Triplett ◽  
Daniel Lam ◽  
Emre Yengel ◽  
Heim Grewal ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
High Performance ◽  
Mechanical Load ◽  
Electrical Contact ◽  
Test Method ◽  
Transfer Printing ◽  
Glass Substrates ◽  
Current Voltage ◽  
Force Resolution ◽  
Nano Wires

ABSTRACTWe report an experimental investigation on employing Ag nanoparticles to provide electrical and mechanical contacts between transfer-printed semiconductor devices in the shape of micro/nano- wires and pillars. The Ag nanoparticles have diameters ranging between 200-800nm and are assembled on a 200nm Au film deposited on glass substrates. With a customized tool, an ensemble of silicon pillars were brought into contact with the silver (Ag) nanoparticles (AgNPs) by precisely controlling the displacement and applied force (pressure). Current-voltage measurements were done at force resolution of ~0.2N. The test method aims to illuminate the pillar-particle contact mechanism using the nanoparticles as conductive fillers for the next generation of high performance heteroepitaxial device transfer-printing applications.

RESEARCH ON OPTICAL ABSORPTION CHARACTERISTICS OF Ag NANOPARTICLES

2013 ◽  
Vol 27 (11) ◽  
pp. 1350079 ◽  
Author(s):  
FENGXIANG CHEN ◽  
WENYING XU ◽  
LISHENG WANG
Keyword(s):  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Mie Scattering ◽  
Resonance Peak ◽  
Experimental Results ◽  
Ag Nanoparticle ◽  
Plasmon Resonance Peak ◽  
Glass Substrates ◽  
Nanoparticle Surface ◽  
Peak Location

In this work, Ag nanoparticles were deposited on quartz glass substrates by magnetron sputtering method, and the morphology was characterized by SEM. Ag nanoparticle surface plasmon resonance characteristics were observed by transmittance measurement. The experimental results demonstrated an increase in particle size that was correlated to an increase in sputtering time and a plasmon resonance absorption peak redshift. This phenomenon was partially explained by Mie scattering model. The differences between our theoretical analysis and experimental results show that both the shape of and the spacing between nanoparticles are key parameters affecting plasmon resonance peak location.

Sign in / Sign up

Export Citation Format

Share Document