期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 14, 期 9, 页码 6509-6527出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2014.9362
关键词
Conducting Polymers; Conjugated Polymers; Nanostructured Materials; Chemical Sensors; Electrical Properties; Optical Properties
类别
资金
- FAPESP (Fundacao de Amparo Pesquisa do Estado de Sao Paulo), Brazil
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico), Brazil
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior), Brazil
- FINEP (Financiadora de Estudos e Projetos) MCTI (Ministerio da Ciencia, Tecnologia e Inovacao), Brazil
- EMBRAPA (Empresa Brasileira de Pesquisa Agropecuaria), Brazil
Conjugated polymers are organic materials endowed with a pi-electron conjugation along the polymer backbone that present appealing electrical and optical properties for technological applications. By using conjugated polymeric materials in the nanoscale, such properties can be further enhanced. In addition, the use of nanostructured materials makes possible miniaturize devices at the micro/nano scale. The applications of conjugated nanostructured polymers include sensors, actuators, flexible displays, discrete electronic devices, and smart fabric, to name a few. In particular, the use of conjugated polymers in chemical and biological sensors is made feasible owning to their sensitivity to the physicochemical conditions of its surrounding environment, such as chemical composition, pH, dielectric constant, humidity or even temperature. Subtle changes in these conditions bring about variations on the electrical (resistivity and capacitance), optical (absorptivity, luminescence, etc.), and mechanical properties of the conjugated polymer, which can be precisely measured by different experimental methods and ultimately associated with a specific analyte and its concentration. The present review article highlights the main features of conjugated polymers that make them suitable for chemical sensors. An especial emphasis is given to nanostructured sensors systems, which present high sensitivity and selectivity, and find application in beverage and food quality control, pharmaceutical industries, medical diagnosis, environmental monitoring, and homeland security, and other applications as discussed throughout this review.
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