Insertable, scabbarded, and nanoetched silver needle sensor for hazardous element depth profiling by laser-induced breakdown spectroscopy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Binbin Zhou
  • Weiliang Wang
  • Weiping Kou
  • Deng Zhang
  • Lianbo Guo

Detail(s)

Original languageEnglish
Pages (from-to)1381–1389
Number of pages9
Journal / PublicationACS Sensors
Volume7
Issue number5
Online published18 May 2022
Publication statusPublished - 27 May 2022

Abstract

Sensing of hazardous metals is urgent in many areas (e.g., water pollution and meat products) as heavy metals threaten people’s health. Laser-induced breakdown spectroscopy (LIBS), as a rapid, in situ, and multielemental analytical technique, has been widely utilized in rapid hazardous heavy metal sensing. However, loose and water-containing samples (e.g., meat, plant, and soil) are hard to analyze by LIBS directly, and heavy metal depth profiling for bulk samples remains suspenseful. Here, inspired by the Needle, the sword of Arya Stark in Game of Thrones, we propose an insertable, scabbarded, and nanoetched silver (NE-Ag) needle sensor for rapid hazardous element sensing and depth profiling. The NE-Ag needle sensor features a micro–nanostructure surface for inserting into the bulk sample and absorbing hazardous analytes. For accurate elemental depth profiling, we design a stainless-steel scabbard to wrap and protect the NE-Ag needle from pollution (unexpected contaminant absorption) during the needle insertion and extraction process. The results for cadmium (Cd) show that the relative standard deviation equals to 6.7% and the limit of detection reaches 0.8 mg/L (ppm). Furthermore, the correlations (Pearson correlation coefficient) for Cd and chromium (Cr) depth profiling results are no less than 0.96. Furthermore, the total testing time could be less than 1 h. All in all, the insertable and scabbarded NE-Ag needle senor has high potential in rapid hazardous heavy metal depth profiling in different industries.

Research Area(s)

  • hazardous element absorption, depth profiling, NE-Ag needle sensor, scabbard, LIBS

Citation Format(s)

Insertable, scabbarded, and nanoetched silver needle sensor for hazardous element depth profiling by laser-induced breakdown spectroscopy. / Liu, Yuanchao; Zhou, Binbin; Wang, Weiliang; Shen, Junda; Kou, Weiping; Li, Zebiao; Zhang, Deng; Guo, Lianbo; Lau, Condon; Lu, Jian.

In: ACS Sensors, Vol. 7, No. 5, 27.05.2022, p. 1381–1389.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review