Plasmonic enhancement of optical absorption of UV radiation by Au nanoparticles dispersed on ZnO thin film

Rajan, Akshta; Yadav, Harish Kumar; Gupta, Vinay; Tomar, Monika

doi:10.1007/s00339-014-8462-8

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…XPS measurements confirm that the ZnO is stoichiometric, with binding energies of the Zn 2p 1/2 , Zn 2p 3/2 , Zn 3p 1/2 , Zn 3p 3/2 , and O 1s core levels at 1045.4 ± 0.1 eV and 1022.3 ± 0.1 eV, 91.9 ± 0.1 eV and 89.1 ± 0.1 eV, and 530.8 ± 0.1 eV, respectively (Figure c and d, SI Figure S1c). Altogether, the above measurements indicate that the ZnO films are of similar quality to films previously reported in the literature …”

Section: Resultssupporting

confidence: 86%

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Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

et al. 2018

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The integration of high-purity nano-objects on substrates remains a great challenge for addressing scaling-up issues in nanotechnology. For instance, grafting gold nanoparticles (NPs) on zinc oxide films, a major step process for catalysis or photovoltaic applications, still remains difficult to master. We report a modified photodeposition (P-D) approach that achieves tight control of the NPs size (7.5 ± 3 nm), shape (spherical), purity, and high areal density (3500 ± 10 NPs/μm) on ZnO films. This deposition method is also compatible with large ZnO surface areas. Combining electronic microscopy and X-ray photoelectron spectroscopy measurements, we demonstrate that growth occurs primarily in confined spaces (between the grains of the ZnO film), resulting in gold NPs embedded within the ZnO surface grains thus establishing a unique NPs/surface arrangement. This modified P-D process offers a powerful method to control nanoparticle morphology and areal density and to achieve strong Au interaction with the metal oxide substrate. This work also highlights the key role of ZnO surface morphology to control the NPs density and their size distribution. Furthermore, we experimentally demonstrate an increase of the ZnO photocatalytic activity due to high densities of Au NPs, opening applications for the decontamination of water or the photoreduction of water for hydrogen production.

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Section: Resultssupporting

confidence: 86%

“…32 Altogether, the above measurements indicate that the ZnO films are of similar quality to films previously reported in the literature. 38 Au NPs Photodeposition (P-D). After the P-D process, SEM observations show a large amount of spherical Au NPs, organized into chain structures (Figure 1, sample Au/ZnO25).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

et al. 2018

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“…In addition, Au NPs can generate local surface plasmon resonance under UV excitation. [31][32][33][34][35] The near-eld amplitude will be enhanced under resonance conditions and localized on the surface of Au NPs. It can be used as an optical antenna to store UV energy in the near-eld, as well as a sub-wavelength scatterer to capture and redistribute UV light onto SnO 2 NAs, as shown in Fig.…”

Section: Photoelectric Properties Of Sno 2 Nasmentioning

confidence: 99%

High responsivity ultraviolet detector based on novel SnO₂ nanoarrays

Pan

Zhang

et al. 2019

RSC Adv.

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“…The PEC UV detectors utilize an aqueous electrolyte, which has potential applications in underwater detection and communication [9][10][11]. Noble metal nanostructures modification on the surface of semiconductor materials is considered to be a straightforward and effective method to improve photoelectric detectors performance [12][13][14]. As a classical plasma of optical antenna, noble metal nanostructures present the unique ability to concentrate and amplify the intensity of incident light [15][16][17], for the localized surface plasmon resonance (LSPR) by the noble metal nanostructures interact with light of a certain wavelength [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Ag-modified enhance the performances of ZnO@CFs based omnidirectional photoelectrochemical ultraviolet detectors

Zhang,

Li,

Wang

et al. 2024

Nanotechnology

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There are several prospective applications for omnidirectional ultraviolet (UV) detectors and underwater detection detectors in optical systems and optical fields. In this work, ZnO nanorods arrays were grown on carbon fibers (CFs). An appropriate amount of Ag nanoparticles (NPs) was deposited on the surface of ZnO nanorods by photochemical deposition. This improved the performance of photoelectrochemical (PEC) based UV detectors. Under 365 nm and 10 mW cm-2 UV irradiation, the photocurrent density of the 30s-Ag/ZnO@CFs based PEC UV detector can reach 1.28 mA cm-2, which is about 7 times that of the ZnO@CFs based PEC UV detector, and the rising time is shortened from 0.17 s to 0.10 s. The reason is that increased absorption of ultraviolet light induced by the localized surface plasmon resonance. In addition, the detector exhibits a good flexibility and remains flexible after hundreds of bends and twists. Moreover, the detector is responsive in the range of rotation angle from 0 to 360°. It provides an insight to improve the photoelectric performance and underwater omnidirectional detection ability of the PEC UV detector.

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Plasmonic enhancement of optical absorption of UV radiation by Au nanoparticles dispersed on ZnO thin film

Cited by 6 publications

References 16 publications

Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

High responsivity ultraviolet detector based on novel SnO₂ nanoarrays

Ag-modified enhance the performances of ZnO@CFs based omnidirectional photoelectrochemical ultraviolet detectors

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Plasmonic enhancement of optical absorption of UV radiation by Au nanoparticles dispersed on ZnO thin film

Cited by 6 publications

References 16 publications

Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

High responsivity ultraviolet detector based on novel SnO2 nanoarrays

Ag-modified enhance the performances of ZnO@CFs based omnidirectional photoelectrochemical ultraviolet detectors

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Product

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High responsivity ultraviolet detector based on novel SnO₂ nanoarrays