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Boron nitride/gold nanocomposites for crystal violet and creatinine detection by surface-enhanced Raman spectroscopy

机译:氮化硼/金纳米复合材料,用于通过表面增强拉曼光谱法检测结晶紫和肌酸酐

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摘要

Hexagonal boron nitride/gold nanocomposites (h-BN/Au NCs) were fabricated and developed for ultra-sensitive detection of crystal violet (CV) and creatinine molecules using surface enhanced Raman scattering spectroscopy (SERS). The overgrowth of Au nanoparticles was driven by laser-induced photoexcitation of h-BN, which was monitored by absorption spectra. The h-BN/Au NCs with controllable Au compositions (0-1.85%) were characterized using Transmission Electron Microscopy (TEM), Scan Electron Microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS). The microstructural analyses indicated that mono-dispersed Au nanoparticles with size of similar to 10 nm can be accreted on h-BN via 30 min synthetic reaction. The comparative SERS results reveal that the h-BN/Au NCs with 1.68% Au composition provide enhanced SERS activity in comparison with other nanosubstrates in this paper. The corresponding enhancement mechanism of h-BN/Au NCs has been illustrated in detail, which can be composed of four contributions in our research. Then, the SERS analyses demonstrated that the detection limit of CV molecules was achieved at femtomole level of similar to 10(-15 )M, leading to ultrasensitive monitoring of dye pollution. More importantly, well-defined linear relationships were established between SERS signal intensities and logarithmical scale of creatinine concentration (10(-2)-10(-6)M), providing a precise assessment of creatinine in pathological diagnostics.
机译:制备并开发了六方氮化硼/金纳米复合材料(h-BN / Au NCs),用于使用表面增强拉曼散射光谱(SERS)超灵敏地检测结晶紫(CV)和肌酐分子。 Au纳米粒子的过度生长是由激光诱导的h-BN的光激发引起的,这通过吸收光谱进行监测。使用透射电子显微镜(TEM),扫描电子显微镜(SEM),X射线衍射(XRD)和X射线光电子能谱(XPS)对具有可控金成分(0-1.85%)的h-BN / Au NC进行表征。微观结构分析表明,大小约为10 nm的单分散Au纳米颗粒可通过30分钟的合成反应积聚在h-BN上。对比SERS结果表明,与其他纳米底物相比,具有1.68%Au组成的h-BN / Au NCs具有增强的SERS活性。 h-BN / Au NCs的相应增强机制已被详细说明,可以由我们的研究中的四个贡献组成。然后,SERS分析表明CF分子的检出限达到了与10(-15)M相似的飞摩尔水平,从而实现了染料污染的超灵敏监测。更重要的是,在SERS信号强度与肌酐浓度(10(-2)-10(-6)M)的对数刻度之间建立了明确定义的线性关系,从而在病理诊断中提供了肌酐的精确评估。

著录项

  • 来源
    《Applied Surface Science》 |2018年第1期|684-694|共11页
  • 作者单位

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Jinan Cent Hosp, Dept Resp, Jinan 250013, Shandong, Peoples R China;

    Shandong Jianzhu Univ, Sch Sci, Jinan 250101, Shandong, Peoples R China;

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    h-BN/Au nanocomposites; Photo-excitation; SEAS analysis; Dye molecules; Creatinine biomolecules;

    机译:h-BN / Au纳米复合材料;光激发;SEAS分析;染料分子;肌酐生物分子;

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