Journal ArticleDOI
Shape and size dependence of the surface plasmon resonance of gold nanoparticles studied by Photoacoustic technique
T. A. El-Brolossy,Tajeldin M. Abdallah,Mona B. Mohamed,S. Abdallah,K. Easawi,Sohair Negm,Hassan Talaat +6 more
TLDR
In this article, the optical absorption properties of pre-processed gold nanoparticles of different shapes and sizes measured by photoacoustic (PA) method have been reported and the shape and size of these different nanoparticles were determined by STM measurements.Abstract:
We report on the optical absorption properties of as prepared gold naoparticles of different shapes and sizes measured by photoacoustic (PA) method. The gold nanoparticles of two different shapes (dots, rods) have been prepared using the seed mediated growth method. The shape and the size of these different nanoparticles were determined by STM measurements. PA spectra show the splitting of the surface plasmon resonance (SPR) into two modes (transverse and longitudinal) in case of gold nanorods. The increase in the aspect ratio of the nanorods leads to clear redshifts of the longitudinal SPR. These shifts were used to determine the dielectric constant of the surrounding medium and its variation with the aspect ratios.read more
Citations
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Influence of excitation wavelength (UV or visible light) on the photocatalytic activity of titania containing gold nanoparticles for the generation of hydrogen or oxygen from water.
TL;DR: For the novel visible light photoactivity of Au/TiO(2), it has been determined that gold loading, particle size and calcination temperature play a role in the photocatalytic activity, the most active material being the catalyst containing 0.2 wt % gold with 1.87 nm average particle size.
Journal ArticleDOI
Titania supported gold nanoparticles as photocatalyst
TL;DR: The central part of this article is focused on the photocatalytic activity reported for Au/TiO(2) for hydrogen generation, dye decoloration, phenol decomposition and carboxylic acid degradation, among other processes.
Journal ArticleDOI
High-performance gas sensor based on ZnO nanowires functionalized by Au nanoparticles
TL;DR: In this paper, a high performance gas sensor based on Au-functionalized ZnO nanorods was fabricated, where Au nanoparticles were successfully immobilized onto the surface of ZnOs to serve as a sensitizer by a facile solution reduction process.
Journal ArticleDOI
Catalytic reduction of methylene blue and Congo red dyes using green synthesized gold nanoparticles capped by salmalia malabarica gum
Bhagavanth Reddy Ganapuram,Madhusudhan Alle,Ramakrishna Dadigala,Ayodhya Dasari,Venkatesham Maragoni,Veerabhadram Guttena +5 more
TL;DR: In this paper, Salmalia malabarica gum was used as both reducing and capping agent to synthesize stable gold nanoparticles (AuNPs) with a peak at 520-535 nm in the UV-Vis spectrum.
Journal ArticleDOI
Controllable Shifts in Threshold Voltage of Top‐Gate Polymer Field‐Effect Transistors for Applications in Organic Nano Floating Gate Memory
TL;DR: In this paper, a solution-processed poly[9,9-dioctylfluorenyl-2,7-diyl]-co-(bithiophene)] (F8T2) nano floating gate memory (NFGM) with a top-gate/bottom-contact device configuration is reported.
References
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Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Book
Optical Properties of Metal Clusters
U. Kreibig,Michael Vollmer +1 more
TL;DR: In this paper, the authors present a survey of optical spectra of Elemental Metal Clusters and Chain Aggregates and discuss experimental results and experimental methods for metal clustering experiments.
Journal ArticleDOI
Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method
TL;DR: In this article, a method was used for preparing gold NRs with aspect ratios ranging from 1.5 to 4.5 for which the surface plasmon absorption maxima are between 600 and 1300 nm.
Journal ArticleDOI
Spectral properties and relaxation dynamics of surface plasmon electronic oscillations in gold and silver nanodots and nanorods
TL;DR: In this paper, the surface plasmon absorption of noble metal nanoparticles was studied and the effects of size, shape, and composition on the plasman absorption maximum and its bandwidth were discussed.