JOURNAL OF RAMAN SPECTROSCOPY
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2019
·Vol. 50
·期 11
·1679-1690
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IF 2.809
Hang Zhao,Wuliji Hasi,Nan Li,Xuanyu Sha,Siqingaowa Han
This paper reports a “bottom-up” substrate preparation method using a two-phase interface self-assembly technology that combines silver-coated gold core–shell nanorods with the thermally shrinkable polystyrene (TSP) support material for surface-enhanced Raman spectroscopy (SERS), that is, TSP-SERS substrate. The gold nanorods with long absorption wavelength were used as the core, and the silver shells were coated to obtain the core–shell nanostructures with a stronger resonance with the wavelength of the light source. The density of the nanostructures and numbers of “hot spots” within the light spot increased via the three-dimensional folding feature formed by thermal shrinkage. The combined effect of the two factors increases the enhancement factor by an order of magnitude to 10 7 after thermal contraction. The detection concentration of 4-mercaptobenzoic acid can reach 10 −9 M, and the maximum relative standard deviation is only 8.9%. In fact, the detection limit of benzimidazole on the surface of apple can reach 0.5 mg/L, and the recovery deviation is controlled within the range of 11.7%. The practical detection of benzimidazole pesticide residues showed that this method has wide application prospects in the detection of pesticide residues.
研究领域:
材料科学
·
分析化学
·
环境科学
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DOI
高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 26
·47248-47258
·
IF 3.2
Junhao Zhang,Junhao Zhang,Xiaomeng Bian,Xiaomeng Bian,Xiaomeng Bian,Wenqiang Xing,Wenqiang Xing,Hao Bi,Hao Bi,Misheng Liang,Misheng Liang,Rui You,Rui You,Rui You
This study presents what we believe to be a novel method using a laser-induced heat-shrinkable polymer to leverage the rapid processing capabilities of femtosecond-laser-prepared microstructures and accelerate the fabrication of three-dimensional optical metasurface biochemical sensors. Arrays of micropillar unit structures, each 220 µm in height, were successfully fabricated by modulating laser-induced contraction. These arrays exhibited exceptional performance in fingerprint spectral coupling and biochemical sensing, achieving detection limits of 6 nM for lactose and 8 pg/mL for the SARS-CoV-2 S protein. The metasurface sensors demonstrated high sensitivities and low detection limits, while the simplified manufacturing process further enhanced device performance, highlighting the method’s potential for advanced biochemical sensing applications.
研究领域:
生物医学工程
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光学传感器
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Dapeng Li,Jianghe Chen,Yang Fu,Linhai Yang
This study synthesized amorphous copper-doped carbon nitride intermediates (Cu/CN-400) via a template-free self-assembly approach using melamine as the precursor, copper sulfate pentahydrate as the copper source, and deionized water as solvent. By controlling thermal polycondensation temperature (400℃ optimal), we regulated intermediate condensation degrees and achieved transformation of copper from ionic to amorphous states. Comprehensive characterization (XRD, FTIR, SEM, TEM, XPS，BET,ICP) revealed the intermediates' morphological and physicochemical properties, enabling proposal of a formation mechanism for amorphous Cu-CN intermediates through template-free self-assembly and thermal condensation. Heterogeneous copper-doped carbon nitride catalysts derived from Cu/CN-400 intermediates demonstrated significantly enhanced Fenton-like catalytic performance, indicating broad application prospects.
研究领域:
材料科学
·
催化
·
纳米技术
·
无机化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiaoxue Lin,Bin Lei,Qin Luo,Mao He,Suqin Wu,Xiaoying Peng,Guiming Peng
Flow photocatalysis represents a cutting-edge technology that could simultaneously achieve fast mass transfer and product separation. The robust carbon nitride aerogel (CN(AG)) holds great promise in conventional photocatalysis as well as in flow photocatalysis due to its high accessible surface area and dimensional integrity. Herein, we developed a facile synthesis of CN(AG) derived from monomer cylinder by dimension-retained thermal condensation for photosynthesis of H 2 O 2 . The obtained CN(AG) delivered 3.74-times higher H 2 O 2 yield by its powder form than common CN in ethanol aqueous solution, reaching 13.66 mmol/g/h with AQY of 15.2 % at 400 nm. While for the bulk CN(AG) cylinder, it demonstrated excellent static and flow H 2 O 2 photosynthesis performances with yields of 10.8 mmol/m 2 /h and 4.8 mmol/m 2 /h, respectively. The applications of the photosynthesized H 2 O 2 were exemplified by the fast photocatalytic degradation of tetracycline hydrochloride and efficient disinfection of E. coli, as well as excellent photocatalytic regeneration ability after high dye adsorption. Mechanism study revealed the two-step 1e − photocatalytic oxygen reduction pathway. This work demonstrated efficient photosynthesis of H 2 O 2 and environmental remediation by a robust CN aerogel and would inspire many other energy/environment related applications.
研究领域:
环境科学
·
材料化学
·
光催化
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可持续能源
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）