Surface encapsulation of ZIF-8 on Ag nanoparticles modified cotton swab for highly rapid and selective surface-enhanced Raman spectroscopy analysis of glucose and lactic acid in human sweat

IF 4.3 2区 化学 Q1 SPECTROSCOPY
Yahao Liu , Dabing Ren , Ying Gu , Fengmin Duan , Lunzhao Yi , Kun Ge
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Abstract

Herein, ZIF-8 shell encapsulated Ag nanoparticles decorated cotton swab (CS@Ag@ZIF-8) was firstly designed and prepared for highly rapid and selective surface-enhanced Raman spectroscopy (SERS) analysis of glucose and lactic acid in human sweat. The CS not only act as support matrix for Ag modification and ZIF-8 encapsulation, but also provide great potential in-situ analysis of human sweat with low cost. The as-developed CS@Ag@ZIF-8 shows high SERS activity owing the good adsorption of ZIF-8 shell and electromagnetic enhancement of AgNPs. The 4-mercaptophenylboronic acid (4-MPBA) and 5,5′-dithiobis-(2-nitrobenzoic acid) (DTNB) with limits of detection (LOD) of 1.0 and 10.0 ng/L can be reached, as well as enhancement factor of 108 level. In addition, the good stability and repeatability of CS@Ag@ZIF-8 can be obtained in various conditions. The recognition probes based on 4-MPBA and DTNB modified CS@Ag@ZIF-8 were fabricated for rapid and selective detection of glucose and lactic acid in human sweat. The promising linearity in range of 0.1–100.0 μmol/L and 0.1–50.0 mmol/L with LOD of 0.04 μmol/L and 0.03 mmol/L for glucose and lactic acid were achieved, respectively. The detection errors between commercial meter and developed method was in range of –6.4 to 6.0 %. Our results provide a promising strategy in fabrication of portable SERS substrates with satisfied performance for rapid, selective and in-situ quantification of biomolecules in complex biological samples.

Abstract Image

纳米银修饰棉签表面包封ZIF-8用于人体汗液中葡萄糖和乳酸的快速和选择性表面增强拉曼光谱分析。
本文首先设计并制备了ZIF-8壳包银纳米颗粒装饰棉签(CS@Ag@ZIF-8),用于人体汗液中葡萄糖和乳酸的高快速选择性表面增强拉曼光谱(SERS)分析。CS不仅可以作为Ag修饰和ZIF-8包封的支撑基质,而且成本低廉,为人体汗液的原位分析提供了巨大的潜力。所制备的CS@Ag@ZIF-8由于ZIF-8外壳的良好吸附和AgNPs的电磁增强,具有较高的SERS活性。4-巯基苯硼酸(4-MPBA)和5,5′-二硫比斯-(2-硝基苯甲酸)(DTNB)的检出限(LOD)分别为1.0和10.0 ng/L,增强因子为108级。此外,CS@Ag@ZIF-8在各种条件下均可获得良好的稳定性和重复性。制备了基于4-MPBA和DTNB修饰CS@Ag@ZIF-8的识别探针,用于快速、选择性地检测人体汗液中的葡萄糖和乳酸。葡萄糖和乳酸在0.1 ~ 100.0 μmol/L和0.1 ~ 50.0 mmol/L范围内呈良好的线性关系,LOD分别为0.04 μmol/L和0.03 mmol/L。该方法与市售电表的检测误差在-6.4 ~ 6.0%之间。我们的研究结果为制造便携式SERS底物提供了一种有前景的策略,该底物具有令人满意的性能,可用于快速,选择性和原位定量复杂生物样品中的生物分子。
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来源期刊
CiteScore
8.40
自引率
11.40%
发文量
1364
审稿时长
40 days
期刊介绍: Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.
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