Silver nanorod arrays for photocathode applications

Vilayurganapathy, Subramanian; Nandasiri, Manjula I.; Joly, Alan G.; El‐Khoury, Patrick Z.; Varga, Tamás; Coffey, Greg W.; Schwenzer, Birgit; Pandey, Archana; Kayani, A.; Hess, Wayne P.; Thevuthasan, Suntharampillai

doi:10.1063/1.4825262

Cited by 18 publications

(7 citation statements)

References 26 publications

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“…Lu et al demonstrated that sunlight could also be used for the reduction of silver ions to nanoparticles adsorbed on the surface of DNA [ 51 ]. Among all the templates, anodic aluminum oxide (AAO) is the most commonly used for nanowire synthesis [ 52 , 53 ]. In 2020, AAO templates were used to synthesize single crystalline AgNWs, as shown in Figure 2 e [ 54 ].…”

Section: Agnw Synthesismentioning

confidence: 99%

Silver Nanowire Synthesis and Strategies for Fabricating Transparent Conducting Electrodes

2021

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One-dimensional metal nanowires, with novel functionalities like electrical conductivity, optical transparency and high mechanical stiffness, have attracted widespread interest for use in applications such as transparent electrodes in optoelectronic devices and active components in nanoelectronics and nanophotonics. In particular, silver nanowires (AgNWs) have been widely researched owing to the superlative thermal and electrical conductivity of bulk silver. Herein, we present a detailed review of the synthesis of AgNWs and their utilization in fabricating improved transparent conducting electrodes (TCE). We discuss a range of AgNW synthesis protocols, including template assisted and wet chemical techniques, and their ability to control the morphology of the synthesized nanowires. Furthermore, the use of scalable and cost-effective solution deposition methods to fabricate AgNW based TCE, along with the numerous treatments used for enhancing their optoelectronic properties, are also discussed.

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Section: Agnw Synthesismentioning

confidence: 99%

Silver Nanowire Synthesis and Strategies for Fabricating Transparent Conducting Electrodes

2021

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“…For the situation without PNF, the emittance of beam can be written as formula (10), which contains intrinsic thermal emittance and the part caused by roughness of the cathode. When the PNF is introduced, the emittance mainly contains three parts: the intrinsic thermal emittance, the emittance caused by roughness, and the emittance caused by plasmonic near field, which can be given by formula (11).…”

Section: Calculation and Analysis Of The Emittance Increased By Pnfmentioning

confidence: 99%

“…Because the same electron emissions are assumed in the two simulations, both of the intrinsic thermal emittances can be written as ε Intrisic . Combined the formula (10) and (11), the emittance caused by the plasmonic near field can be obtained by formula (12)…”

Section: Calculation and Analysis Of The Emittance Increased By Pnfmentioning

confidence: 99%

“…In recent years, the plasmon-enhanced photocathode (PEP) attracts more attentions, which introduces the surface plasmon polarizations (SPPs) to enhance the interaction between laser and materials [8]. With the help of SPPs, this kind of photocathode has the potential to yield much more electrons than traditional metal photocathode [9][10][11], and it can operate with longer wavelength laser, which reduces the demand of drive laser system [7,12]. Moreover, it has longer lifetime, lower vacuum requirement, and relatively more mature preparation technology than some high quantum efficiency semiconductor photocathodes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of plasmonic near field on the emittance of plasmon-enhanced photocathode

Jiang

Huang

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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The introduction of the surface plasmon polarizations makes the emittance of the photocathode complicated. In this paper, the emittance of plasmon-enhanced photocathode is analyzed. It is first demonstrated that the plasmonic near field can increase the emittance of the plasmon-enhanced photocathode. A simulation method has been used to estimate the emittance caused by plasmonic near field, and the suppression method also has been discussed, both of which are significant for the design of high performance plasmon-enhanced photocathode. IntroductionWith the virtue of prompt response (ps-fs), high brightness, and low emittance etc., the photocathode has becomes a significant enabling technology for the 4 th generation light sources and advanced accelerator and electron microscopy technology, such as X-ray free electron laser, inverse Compton scattering sources, energy recovery linac, and dynamic transmission electron microscopy etc [1-3]. The metal photocathode has been researched for a long time and used in many facilities, due to its virtue of high brightness, long lifetime, and low cost. And it has been indicated that it holds great promise to eject a uniform 3D ellipsoid electron bunch with only linear internal space charge fields because of its ultrafast response characteristic, which is an ideal distribution for a high-brightness FEL operation [4][5][6]. But, in order to ensure a high photoemission yield, the metal photocathode usually needs to be pumped by high power ultraviolent laser, which undoubtedly increases the demand and cost for the drive laser [7].In recent years, the plasmon-enhanced photocathode (PEP) attracts more attentions, which introduces the surface plasmon polarizations (SPPs) to enhance the interaction between laser and materials [8]. With the help of SPPs, this kind of photocathode has the potential to yield much more electrons than traditional metal photocathode [9-11], and it can operate with longer wavelength laser, which reduces the demand of drive laser system [7,12]. Moreover, it has longer lifetime, lower vacuum requirement, and relatively more mature preparation technology than some high quantum efficiency semiconductor photocathodes.However, emittance is also a vital parameter for the usefulness of electron sources in many applications [13][14][15][16][17][18]. When the surface plasmon polarizations (SPPs) are introduced into the photocathode, the emittance of the bunch increases [12], and the mechanism of which becomes complicated and unknown. All of these will restrict the development of high performance plasmon-enhanced photocathode [19].In this paper, based on the theory of SPPs, we research the influence of SPPs on the emittance of PEP. And a plasmon-enhanced photocathode excited with square hole array has been designed to operate at 532nm. Using this PEP, we demonstrate and research the influence of plasmonic near field on the emittance. Characteristics of Plasmon-enhanced photocathodeThe process of photoemission can be broken up into three steps: (1) photon absorption and...

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“…18 Silver nanorod (Ag NR) array substrate fabricated by oblique angle deposition (OAD) technology 19 has attracted the attention of researchers because it showed signi¯cant advantages in the¯ne control over the geometric parameters, simple fabrication process, good sensitivity and high reproducibility. 20 These merits make Ag NR array a good candidate for the SERS-based sensing and imaging, such as the photocathode applications 21 and biomolecule detection. 22,23 The concerned research mainly aimed at improving the electromagnetic (EM) enhancement e®ect and the reproducibility of Ag NR array.…”

Section: Introductionmentioning

confidence: 99%

Performance Improving Method of Aligned Silver Nanorod by Grafting Au@Ag Core–Shell Nanoparticles for Surface-Enhanced Raman Scattering

Chen

Dong

Wang

et al. 2017

NANO

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A simple method for improving surface-enhanced Raman scattering (SERS) performance of aligned silver nanorod (Ag NR) array was investigated. This method was to construct a kind of hybrid substrate by grafting Au@Ag core-shell nanoparticles (NPs) into Ag NR array using poly (2-vinylphridine) (P2VPy) as a bridging agent. The hybrid substrate yielded excellent SERS performance as its detection limit improved from 10 À6 M to 10 À8 M using trans-1,2-bis(4-pyridyl) ethylene (BPE) as probe molecule, which was increased by two orders of magnitude compared with Ag NR array substrate. The signi¯cant improvement of SERS performance of Ag NR arrays was attributed to the addition of Au@Ag core-shell NPs. As a result of surface plasmon resonance generated by the interaction of electromagnetic (EM) (IAEM)¯led between NP and NR structures, increasing hotspots were found at the connections of NPs and NRs, the gaps of adjacent rods, and the gaps of two particles consequently. These results were validated by the¯nite di®erence time domain (FDTD) calculation. Besides, hybrid substrate shows good performance in stability and reproducibility. The proposed method was simple and robust, which promoted SERS performance of Ag NR array e®ectively, showing great potential in the application of SERS substrate fabrication and SERS-based bio-chemical sensing.

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Silver nanorod arrays for photocathode applications

Abstract: Highly sensitive superhydrophobic Ag nanorods array substrates for surface enhanced fluorescence studies Appl. Phys. Lett.Influence of substrate temperature on glancing angle deposited Ag nanorods

Cited by 18 publications

References 26 publications

Silver Nanowire Synthesis and Strategies for Fabricating Transparent Conducting Electrodes

Silver Nanowire Synthesis and Strategies for Fabricating Transparent Conducting Electrodes

Effect of plasmonic near field on the emittance of plasmon-enhanced photocathode

Performance Improving Method of Aligned Silver Nanorod by Grafting Au@Ag Core–Shell Nanoparticles for Surface-Enhanced Raman Scattering

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