scholarly journals Emission kinetics of HITC laser dye on top of arrays of Ag nanowires

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sangeeta Rout ◽  
Vanessa N. Peters ◽  
Sangram K. Pradhan ◽  
Carl E. Bonner ◽  
Mikhail A. Noginov
Keyword(s):  
Silver Nanowires ◽  
Concentration Quenching ◽  
Spatial Inhomogeneity ◽  
Nonradiative Relaxation ◽  
Alumina Membranes ◽  
Förster Energy Transfer ◽  
Ag Nanowires ◽  
Hyperbolic Dispersion ◽  
Doped Polymer ◽  
Kinetics Of

Abstract We have grown arrays of silver nanowires in pores of anodic alumina membranes (metamaterials with hyperbolic dispersion at λ ≥ 615 nm), spin coated them with the dye-doped polymer (HITC:PMMA), and studied the rates of radiative and nonradiative relaxation as well as the concentration quenching (Förster energy transfer to acceptors). The results were compared to those obtained on top of planar Ag films and glass (control samples). The strong spatial inhomogeneity of emission kinetics recorded in different spots across the sample and strong inhibition of the concentration quenching in arrays of Ag nanowires are among the most significant findings of this study.

Photoluminescence and its damping kinetics of nanoporous alumina membranes formed in solutions of various carboxylic acids

2021 ◽  
Author(s):  
I. A. Vrublevsky ◽  
K. V. Chernyakova ◽  
E. N. Muratova ◽  
Yu. M. Spivak ◽  
V. A. Moshnikov
Keyword(s):  
Carboxylic Acids ◽  
Nanoporous Alumina ◽  
Alumina Membranes ◽  
Kinetics Of

Kinetics of nonradiative relaxation from the upper active level of neodymium in a Y3Al5O12crystal

1982 ◽  
Vol 12 (6) ◽  
pp. 744-747 ◽  
Author(s):  
A G Avanesov ◽  
B I Denker ◽  
Vyacheslav V Osiko ◽  
S S Pirumov ◽  
V P Sakun ◽  
...  
Keyword(s):  
Nonradiative Relaxation ◽  
Kinetics Of

scholarly journals Current-induced restructuring in bent silver nanowires

Nanoscale ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 3606-3618 ◽  
Author(s):  
Nitin M. Batra ◽  
Ahad Syed ◽  
Pedro M. F. J. Costa
Keyword(s):  
Silver Nanowires ◽  
Geometric Configuration ◽  
Ag Nanowires ◽  
Structural Responses

The electrical and structural responses of suspended Ag nanowires, subjected to an increasing flow of current, relate highly to their geometric configuration.

Boosting CO2 electroreduction over silver nanowires modified by wet-chemical sulfidation and subsequent electrochemical de-sulfidation

2019 ◽  
Vol 43 (8) ◽  
pp. 3269-3272 ◽  
Author(s):  
Liang Hu ◽  
Yicheng Zhang ◽  
Weiqiang Han
Keyword(s):  
Silver Nanowires ◽  
Co2 Electroreduction ◽  
Ag Nanowires ◽  
Wet Chemical

Ag nanowires modified by wet-chemical sulfidation and subsequent electrochemical de-sulfidation possess more nanofeatures and enhanced eCO2RR performance.

scholarly journals Effect of Random Nanostructured Metallic Environments on Spontaneous Emission of HITC Dye

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2135
Author(s):  
Sangeeta Rout ◽  
Zhen Qi ◽  
Ludvig S. Petrosyan ◽  
Tigran V. Shahbazyan ◽  
Monika M. Biener ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Theoretical Model ◽  
Spontaneous Emission ◽  
Concentration Quenching ◽  
Decay Rates ◽  
Laser Dye ◽  
Strongly Coupled ◽  
Strong Energy ◽  
Concentration Quenching Of Luminescence ◽  
Kinetics Of

We have studied emission kinetics of HITC laser dye on top of glass, smooth Au films, and randomly structured porous Au nanofoams. The observed concentration quenching of luminescence of highly concentrated dye on top of glass (energy transfer to acceptors) and the inhibition of the concentration quenching in vicinity of smooth Au films were in accord with our recent findings. Intriguingly, the emission kinetics recorded in different local spots of the Au nanofoam samples had a spread of the decay rates, which was large at low dye concentrations and became narrower with increase of the dye concentration. We infer that in different subvolumes of Au nanofoams, HITC molecules are coupled to the nanofoams weaker or stronger. The inhibition of the concentration quenching in Au nanofoams was stronger than on top of smooth Au films. This was true for all weakly and strongly coupled subvolumes contributing to the spread of the emission kinetics. The experimental observations were explained using theoretical model accounting for change in the Förster radius caused by the strong energy transfer to metal.

Light transfer from quantum-dot-doped polymer nanowires to silver nanowires

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 60770-60774 ◽  
Author(s):  
Xianguang Yang ◽  
Dinghua Bao ◽  
Baojun Li
Keyword(s):  
Quantum Dot ◽  
Laser Excitation ◽  
Silver Nanowires ◽  
Polymer Nanowires ◽  
Doped Polymer ◽  
Light Transfer ◽  
532 Nm

The plasmons of two silver nanowires are simultaneously excited by photoluminescence of the quantum-dot-doped nanowire under 532 nm laser excitation.

scholarly journals Boosting the Power-Generation Performance of Micro-Sized Al-H2O2 Fuel Cells by Using Silver Nanowires as the Cathode

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2316 ◽  
Author(s):  
Heng Zhang ◽  
Yang Yang ◽  
Tianyu Liu ◽  
Honglong Chang
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Electrochemical Impedance ◽  
Silver Nanowires ◽  
Cathode Side ◽  
Power Sources ◽  
Electrochemical Tests ◽  
Tafel Polarization ◽  
Portable Electronics ◽  
Ag Nanowires

Micro-sized fuel cells represent one of the pollution-free devices available to power portable electronics. However, the insufficient power output limits the possibility of micro-sized fuel cells competing with other power sources, including supercapacitors and lithium batteries. In this study, a novel aluminum-hydrogen peroxide fuel cell is fabricated using uniform silver nanowires with diameters of 0.25 µm as the catalyst at the cathode side. The Ag nanowire solution is prepared via a polyol method, and mixed uniformly with Nafion and ethanol to enhance the adhesion of Ag nanowires. We carry out electrochemical tests, including cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization, to characterize the performance of this catalyst in H2O2 reduction. The Ag nanowires exhibit a high effectiveness and durability while catalyzing the reduction of H2O2 with a low impedance. The micro-sized Al-H2O2 fuel cell equipped with Ag nanowires delivers a power density of 43 W·m−2 under a low concentration of H2O2 (0.1 M), which is substantially higher than the previously reported devices.

Laser Shock Based Controlled Forming of Silver Nanowires

2011 ◽  
Author(s):  
Ji Li ◽  
Yiliang Liao ◽  
Gary J. Cheng
Keyword(s):  
Silver Nanowires ◽  
Dislocation Motion ◽  
Laser Shock ◽  
General Technique ◽  
Microstructure Observation ◽  
Pile Up ◽  
Ag Nanowires ◽  
One Step ◽  
Different Shapes ◽  
Controllable Deformation

One-dimensional nanomaterials have attracted a great deal of research interest in the past few decades due to their unique mechanical, electrical and optical properties. Changing the shape of nanowires is a big challenge, but remains key for realistic applications of nanowires. Here we report a general technique to flexibly form nanowires into different shapes by making use of laser shock pressure. Controllable deformation is induced into nanowires in a similar manner as traditional metal forming. Shaping of silver nanowires is demonstrated, during which the Ag nanowires exhibit very good ductility (strain to failure is larger than 1). The microstructure observation indicates that the main deformation mechanism in Ag nanowires under dynamic loading is controlled by twinning and stacking fault formation. Dislocation motion and pile-up is still operative but less important. Our method provides a simple, unique, and one-step approach in massive forming and machining nanowires.

scholarly journals High-Yield Synthesis of Uniform Ag Nanowires with High Aspect Ratios by Introducing the Long-Chain PVP in an Improved Polyol Process

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Jie-Jun Zhu ◽  
Cai-Xia Kan ◽  
Jian-Guo Wan ◽  
Min Han ◽  
Guang-Hou Wang
Keyword(s):  
Silver Nanowires ◽  
Polyol Process ◽  
High Yield ◽  
Chemical Adsorption ◽  
Capping Agent ◽  
Molecular Weights ◽  
Aspect Ratios ◽  
Initial Stage ◽  
Ag Nanowires ◽  
Long Chain

Polyvinyl pyrrolidone (PVP) with different molecular weights was used as capping agent to synthesize silver nanowires through a polyol process. The results indicated that the yields and aspect ratios of silver nanowires were controlled by the chain length of PVP and increased with increasing the molecular weight (MW) of PVP. When the long-chain PVP-K90 (MW = 800,000) was used, the product was uniform in size and was dominated by nanowires with high aspect ratios. The growth mechanism of the nanowires was studied. It is proposed that the chemical adsorption of Ag+on the PVP chains at the initial stage promotes the growth of Ag nanowires.

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