Surface-Mediated Interconnections of Nanoparticles in Cellulosic Fibrous Materials toward 3D Sensors

Shan Yan, Shiyao Shan, Jianguo Wen, Jing Li, Ning Kang, Zhipeng Wu, Jack Lombardi, Han Wen Cheng, Jie Wang, Jin Luo, Ning He, Derrick Mott, Lichang Wang, Qingfeng Ge, Benjamin S. Hsiao, Mark Poliks, Chuan Jian Zhong

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Fibrous materials serve as an intriguing class of 3D materials to meet the growing demands for flexible, foldable, biocompatible, biodegradable, disposable, inexpensive, and wearable sensors and the rising desires for higher sensitivity, greater miniaturization, lower cost, and better wearability. The use of such materials for the creation of a fibrous sensor substrate that interfaces with a sensing film in 3D with the transducing electronics is however difficult by conventional photolithographic methods. Here, a highly effective pathway featuring surface-mediated interconnection (SMI) of metal nanoclusters (NCs) and nanoparticles (NPs) in fibrous materials at ambient conditions is demonstrated for fabricating fibrous sensor substrates or platforms. Bimodally distributed gold–copper alloy NCs and NPs are used as a model system to demonstrate the semiconductive-to-metallic conductivity transition, quantized capacitive charging, and anisotropic conductivity characteristics. Upon coupling SMI of NCs/NPs as electrically conductive microelectrodes and surface-mediated assembly (SMA) of the NCs/NPs as chemically sensitive interfaces, the resulting fibrous chemiresistors function as sensitive and selective sensors for gaseous and vaporous analytes. This new SMI–SMA strategy has significant implications for manufacturing high-performance fibrous platforms to meet the growing demands of the advanced multifunctional sensors and biosensors.

Original languageEnglish
Article number2002171
JournalAdvanced Materials
Volume32
Issue number36
DOIs
Publication statusPublished - 2020 Sep 1

Keywords

  • cellulose
  • fibrous materials
  • metal nanoclusters
  • metal nanoparticles
  • sensors
  • thin films

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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