Fabrication of chemical sensor for organochlorine pesticide detection using colloidal gold nanoparticles
- PDF / 696,302 Bytes
- 8 Pages / 612 x 792 pts (letter) Page_size
- 43 Downloads / 161 Views
Research Letter
Fabrication of chemical sensor for organochlorine pesticide detection using colloidal gold nanoparticles Puja Goel, Physics Department, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India Manju Arora, CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India Address all correspondence to Puja Goel at [email protected] (Received 9 March 2018; accepted 26 June 2018)
Abstract Gold nanoparticles (GNPs) of ∼8 nm in diameter were used for the detection of organochlorine endosulfan pesticide (ESP) as colorimetric sensor and the design of GNP-based chemical sensor for its quantitative estimation has also been proposed. The original wine red color of GNPs changes into various shades of blue after the addition of different concentrations of ESP solutions. A GNP-based sensing electrode has been used for designing of ESP detection chemical sensor at ambient temperature. The response and sensitivity of ESP sensor parameters are obtained from their recovery curves of the change in resistance versus time.
Introduction In recent years, a lot of work has been conducted throughout the world on the synthesis of varieties of nanomaterials and nanotechnology-derived devices owing to ease of portability, better stability, selectivity, and sensitivity in various advanced applications and measurement techniques.[1–5] The nanotechnology based devices are extensively explored in the field of electronics, sensors, drug delivery, environmental monitoring, food quality, catalysis[6–8] etc. In order to achieve this, one requires the synthesis of controlled uniform sized nanoparticles with a desired surface morphology which provides the base for the development of advanced futuristic sensing systems and portable instrumentation by the incorporation of nanotechnology. In addition to the area of engineering, materials, communications, and bio-medical, the potential of nanotechnology based innovation is very high in the field of agriculture with respect to addressing global challenges of various levels of pollutions caused by drastic increase in population and industrialization, environmental decontamination, climate change, water purification, plant protection, pesticide detection etc.[9–14] Nanocrystalline gold in the form of quantum dots, nanocapsules, thin films, and nanoparticles is already in use for the detection of pesticides, the enhancement of nutrient absorption by plants, the delivery of active ingredients to specific sites, and water treatment processes.[15–19] In addition to this, the use of target-specific nanoparticles also helps in reducing the damage to non-target tissues in plants/animal cells and the chemicals released into the environment. In the field of colorimetric and electrochemical-based pesticide detection systems, work is already ongoing on the fabrication of low cost, user friendly, high performance, and
bio-compatible gold nanoparticle (GNP) based sensors.[6,7,20–24] GNPs are chosen due to their simple synthesis p
Data Loading...
