Solution‐Processed Nanoporous Organic Semiconductor Thin Films: Toward Health and Environmental Monitoring of Volatile Markers
Abstract
Porous materials are ubiquitous in nature and have found a wide range of applications because of their unique absorption, optical, mechanical, and catalytic properties. Large surface‐area‐to‐volume ratio is deemed a key factor contributing to their catalytic properties. Here, it is shown that introducing tunable nanopores (50–700 nm) to organic semiconductor thin films enhances their reactivity with volatile organic compounds by up to an order of magnitude, while the surface‐area‐to‐volume ratio is almost unchanged. Mechanistic investigations show that nanopores grant direct access to the highly reactive sites otherwise buried in the conductive channel of the transistor. The high reactivity of nanoporous organic field‐effect transistors leads to unprecedented ultrasensitive, ultrafast, selective chemical sensing below the 1 ppb level on a hundred millisecond time scale, enabling a wide range of health and environmental applications. Flexible sensor chip for monitoring breath ammonia is further demonstrated; this is a potential biomarker for chronic kidney disease.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 02, 2017
- Source ID
- 10.1002/adfm.201701117
Entities
People
- Erfan Mohammadi
- Fengjiao Zhang
- Ge Qu
- Jianguo Mei
- Ying Diao
Organizations
- Argonne National Laboratory
- Chinese Academy of Sciences
- Division of Materials Research
- National Science Foundation
- Office of Naval Research
- Purdue University
- University of Illinois Urbana–Champaign