期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 110, 期 35, 页码 E3265-E3270出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1307251110
关键词
mechanochemistry; gas sensor arrays; pencil; nanocarbon; electronic nose
资金
- Army Research Office through the Institute for Soldier Nanotechnologies
- National Institutes of Health under Ruth L. Kirschstein National Research Service Award from the National Cancer Institute [F32CA157197]
- NATIONAL CANCER INSTITUTE [F32CA157197] Funding Source: NIH RePORTER
Chemically functionalized carbon nanotubes (CNTs) are promising materials for sensing of gases and volatile organic compounds. However, the poor solubility of carbon nanotubes hinders their chemical functionalization and the subsequent integration of these materials into devices. This manuscript describes a solvent-free procedure for rapid prototyping of selective chemiresistors from CNTs and graphite on the surface of paper. This procedure enables fabrication of functional gas sensors from commercially available starting materials in less than 15 min. The first step of this procedure involves the generation of solid composites of CNTs or graphite with small molecule selectors-designed to interact with specific classes of gaseous analytes-by solvent-free mechanical mixing in a ball mill and subsequent compression. The second step involves deposition of chemiresistive sensors by mechanical abrasion of these solid composites onto the surface of paper. Parallel fabrication of multiple chemiresistors from diverse composites rapidly generates cross-reactive arrays capable of sensing and differentiating gases and volatile organic compounds at part-per-million and part-per-thousand concentrations.
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