Preparation of ZnO/Ag nanoflowers by hydrothermal assisted with galvanic effect and its surface enhanced Raman scattering activity

Tran, Thi Ha; Pham, Nguyen Hai; Nguyen, Thi Huyen; Nguyen, Thi Dieu Thu; Sai, Cong Doanh; Nguyen, Quang Hoa; Nguyen, Viet Tuyen; Le, Minh Phuong; Tran, Van Tan; Nguyen, Thanh Binh; Nguyen, Trong Tam; Duong, Thi Nguyet; Tran, Tien Dat; Dai, Ngoc Do; Pham, Van Thanh; Ngac, An Bang

doi:10.1016/j.cplett.2023.140948

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…Our result is also consistent with the conclusions from other scientists. For example, Ngac et al also reported three peaks of ZnO/Ag nanoflowers at 330, 376, and 437 cm −1 , which are related to the vibrations modes of E2(high)−E2(low), A1(TO), and E2(high) [ 46 ]. The most prominent peak at 438 cm −1 is related to the vibration of zinc lattices [ 46 , 47 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Hydrophilic ZnO Microstructure Film with Underwater Oleophobic and Self-Cleaning Antifouling Properties

Li,

Xue,

Wang

et al. 2024

Nanomaterials

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Super-hydrophilic and oleophobic functional materials can prevent pollution or adsorption by repelling oil, and have good circulation. However, traditional strategies for preparing these functional materials either use expensive fabrication machines or contain possibly toxic organic polymers, which may prohibit the practical application. The research of multifunctional ZnO microstructures or nanoarrays thin films with super-hydrophilic, antifouling, and antibacterial properties has not been reported yet. Moreover, the exploration of underwater oleophobic and self-cleaning antifouling properties in ZnO micro/nanostructures is still in its infancy. Here, we prepared ZnO microstructured films on fluorine-doped tin oxide substrates (F-ZMF) for the development of advanced self-cleaning type super-hydrophilic and oleophobic materials. With the increase of the accelerators, the average size of the F-ZMF microstructures decreased. The F-ZMF shows excellent self-cleaning performance and hydrophilic (water contact angle ≤ 10°) and oleophobic characteristics in the underwater antifouling experiment. Under a dark condition, F-ZMF-4 showed good antibacterial effects against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) with inhibition rates of 99.1% and 99.9%, respectively. This study broadens the application scope of ZnO-based material and provides a novel prospect for the development of self-cleaning super-hydrophilic and oleophobic materials.

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Section: Resultsmentioning

confidence: 99%

Antibacterial Hydrophilic ZnO Microstructure Film with Underwater Oleophobic and Self-Cleaning Antifouling Properties

Li,

Xue,

Wang

et al. 2024

Nanomaterials

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Unraveling the mechanism of photo-induced surface enhanced Raman scattering on ZnO/Au thin films

Tran,

Le,

Pham

et al. 2024

Applied Surface Science

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Specific line shape of the lowest frequency Raman scattering modes of triethylene glycol

Ozama,

Amo,

Kameda

et al. 2024

The Journal of Chemical Physics

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For both dielectric spectroscopy and light scattering spectra, the relaxation modes in the microwave region have been characterized by the Debye relaxation model, which is determined by the peak frequency, or by an empirically extended model (e.g., Cole–Davidson and Kohlrausch–Williams–Watts), which has the appropriate line shape. For light scattering from glass-forming liquids, the general line shape is a broader high frequency side in comparison with Debye relaxation. However, for triethylene glycol (TEG) in liquid form at room temperature, the lowest frequency Raman scattering (LFR) mode shows a peak at about 3.0 GHz, which is narrower than that expected for the Debye relaxation. With increasing temperature, this peak exhibits a significant blueshift and begins to resemble the Debye relaxation shape, indicating that the LFR mode of TEG is also a relaxation mode. The narrowing of the LFR mode of TEG is suggested to be caused from the increased non-whiteness of the fluctuation correlations due to increased hydrogen bonding. This is a consequence of breaking the Debye relaxation model’s approximation of the overdamping and narrowing limits in the GHz region, which was found in this study by analyzing the relaxation modes of Raman scattering using the multiple random telegraph model for evaluating thermal bath correlation. The analysis results show that the LFR relaxation times of TEG and the main dielectric relaxation overlap only by 333 K. However, the second LFR mode and β-relaxation at higher frequencies coincide over a wide temperature range, suggesting that they are corresponding modes.

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Preparation of ZnO/Ag nanoflowers by hydrothermal assisted with galvanic effect and its surface enhanced Raman scattering activity

Cited by 5 publications

References 29 publications

Antibacterial Hydrophilic ZnO Microstructure Film with Underwater Oleophobic and Self-Cleaning Antifouling Properties

Antibacterial Hydrophilic ZnO Microstructure Film with Underwater Oleophobic and Self-Cleaning Antifouling Properties

Unraveling the mechanism of photo-induced surface enhanced Raman scattering on ZnO/Au thin films

Specific line shape of the lowest frequency Raman scattering modes of triethylene glycol

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