Fabrication and characterizations of ZnO nanorods/Au nanoparticle composites on the electropolished Ti substrate

Chen, Hsiang; Yeh, Yih-Min; Chen, Jianzhi; Liu, Song-Ming; Huang, Bo; Wu, Zhi-Huei; Tsai, S. T.; Chang, Hung-Wei; Chu, Yu–Cheng; Liao, Chuan

doi:10.1016/j.tsf.2013.06.021

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…This will further enhance the already existing O 2 related depletion layer. Thus, the Au NPs can play important roles in reducing the dark current, enhancing the sensitivity and improving the response speed of the ZnO based thin film photoconductors 19 20 . The very small amount of the Au NPs with small sizes (2–4 nm in diameter) on the ZnO film have negligible absorption, reflection/scattering for the incident visible light.…”

Section: Resultsmentioning

confidence: 99%

High-performance flexible ultraviolet photoconductors based on solution-processed ultrathin ZnO/Au nanoparticle composite films

Jin

Gao

Qing

et al. 2014

Sci Rep

160

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Transparent ultraviolet (UV) ZnO thin film photoconductors are expected to have great applications in environmental monitoring, large-area displays, and optical communications, and they have drawn enormous interests in recent years. However, at present their performances are not satisfactory: the responsivity R (a parameter characterizing the sensitivity of the device to light) is not high (<1.0 × 103 AW−1), and the transparency T is not high either (<80%). Realizing high R and high T remains a big challenge today. In this paper, by employing solution-processed ultrathin ZnO/Au nanoparticle composite films, R as high as 1.51 × 105 AW−1 and T of over 90% are achieved. High values for detectivity D* and linear dynamic range LDR are also obtained, which are 2.05 × 1015 Jones and 60 dB, respectively. Moreover, such high-performance devices can be fabricated on flexible PET (polyethylene terephthalate) substrates.

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Section: Resultsmentioning

confidence: 99%

High-performance flexible ultraviolet photoconductors based on solution-processed ultrathin ZnO/Au nanoparticle composite films

Jin

Gao

Qing

et al. 2014

Sci Rep

160

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“…Compared with that of HT‐0 (Figure 3b), the amplified SEM image of PHT‐1 clearly shows a vertical chain composed of regularly arranged clusters with the average diameter equivalent to 159 nm in the cross section (Figure 3e); moreover, 8.40% high iron element appears in the white rectangle box of PHT‐1 measured by energy dispersive spectrometer (EDS) (Figure 3f). The peak at 2 keV in Figure 3c,f is assigned to the gold element, [ 22 ] which is derived from the sputter‐coated gold on the surface of freeze‐dried gel samples. Similar to the EDS results, there is no iron element existing in dried HT‐0 gel that is detected by X‐ray photoelectron spectroscopy (XPS); however, PHT‐1 gel contained only 0.17% of iron element as shown in Table S2, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Magnetically Assembled Photonic Crystal Gels with Wide Thermochromic Range and High Sensitivity

Jia

Xie

Qiu

et al. 2021

Macromol. Rapid Commun.

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Thermochromic poly(N‐isopropyl acrylamide) (PNIPAM) photonic crystal gels based on 1D magnetically assembling colloidal nanocrystal clusters have attracted much attention due to its convenient preparation process, striking color response, and good mechanical strength. However, there remain challenges to broaden the thermochromic range and improve the sensitivity for their iridescent color display. Here, a PNIPAM photonic gel with wide thermochromic range and high sensitivity is prepared by using four‐arm star poly(ethylene glycol) acrylamide (PEGAAm) as cross‐linker at appropriately reduced magnetic field strength as well as cross‐linker content. PEGAAm improves the homogeneity of the microstructure in PNIPAM photonic gel and thus maintains the structure colors at a wide temperature range from room temperature to 44 °C. The reduced magnetic field strength of 70 Gs and low cross‐linker content (the molar ratio of monomer to cross‐linker of 300:1) lead to a large initial lattice spacing of the photonic gel and thus wide diffraction wavelength migration of 194 nm. This optimized PNIPAM gel exhibits vivid iridescent colors from orange–red to indigo blue as temperature increases from 20 to 44 °C with satisfactory repeatability. Therefore, it may be an ideal candidate for temperature sensors and displays with utility and accuracy such as low‐temperature burns.

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“…In general by augmenting the catalyst in the described way the electron-hole pair recombinations are suppressed leading to a better photocatalytic performance [ 34 ]. Many efforts have been put into synthesizing semiconductor-noble metal nanocomposite materials in the recent years [ 35 , 36 , 37 , 38 , 39 ]. The advantages of Au over other noble metals has been reviewed and discussed [ 40 ] in terms of preparation methods, band offsets between ZnO and Au, photoluminescence properties, structural configurations of Au/ZnO, morphologically determined reactivity, dynamics of charge carriers, and photocatalytic reaction mechanisms associated with Au/ZnO.…”

Section: Introductionmentioning

confidence: 99%

Novel starch-mediated synthesis of Au/ZnO nanocrystals and their photocatalytic properties

Peychev

Vasileva

2021

Heliyon

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A novel solution-solid synthesis method for preparation of ZnO and Au/ZnO composite nanocrystals using starch matrix has been developed and optimized. The process is characterized by simplicity, environmental compatibility and good performance. Nanocomposite samples with different gold content have been synthesized and studied with respect to their structure, size and shape of nanocrystals, thermal behavior, surface characteristics and optical properties, as well as their photocatalytic activity. We have found that modification of nanocrystalline ZnO with gold nanocrystals strongly influences the porosity of nanocomposites -less micro-and mesopores are formed, which results in a reduced specific surface area. The synthesized ZnO and Au/ZnO nanocrystals are active photocatalysts for the photocatalytic degradation of methylene blue (MB), as a model pollutant dye, in the UV region. There is a decrease in photocatalytic activity with an increase of the gold content in the nanocomposite photocatalyst. The degree of MB degradation obtained with a pure ZnO sample is comparable to that with the Au/ ZnO photocatalyst with the lowest gold content 0.05 at. %. New and interesting result has been obtained relating to maximum specific (intrinsic) photocatalytic activity of 0.05 at. % Au/ZnO nanocrystals.

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Fabrication and characterizations of ZnO nanorods/Au nanoparticle composites on the electropolished Ti substrate

Cited by 12 publications

References 17 publications

High-performance flexible ultraviolet photoconductors based on solution-processed ultrathin ZnO/Au nanoparticle composite films

High-performance flexible ultraviolet photoconductors based on solution-processed ultrathin ZnO/Au nanoparticle composite films

Magnetically Assembled Photonic Crystal Gels with Wide Thermochromic Range and High Sensitivity

Novel starch-mediated synthesis of Au/ZnO nanocrystals and their photocatalytic properties

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