Thermally influenced, optical and fluorescence properties of Zinc Oxide nanoparticles for glutathione sensing
- PDF / 4,223,976 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 104 Downloads / 194 Views
Thermally influenced, optical and fluorescence properties of Zinc Oxide nanoparticles for glutathione sensing Janani Archana Kannan1 · Karthikeyan Balasubramanian1 Received: 12 April 2020 / Accepted: 30 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Glutathione, a non-protein thiol molecule is present in abundance in the human body. It plays a major role in maintaining the intracellular redox states, metabolism and detoxification. A novel idea is introduced where zinc oxide nanoparticles are used for the fluorescence sensing of Glutathione. Zinc oxide nanoparticles prepared by the co-precipitation method has been annealed at 400 °C, 700 °C and 900 °C. XRD studies confirmed the evolution of phase and hexagonal wurtzite structure. FESEM images confirm the high degree of crystallinity. Optical absorption measurements exhibit a red shift in absorption for unannealed, 400 °C and 700 °C and a decrease in absorption wavelength for particle annealed at 900 °C. In addition, the bandgap energy decreases with an increase in annealing temperature indicating the increase in particle size. Photoluminescence studies in room temperature at an excitation of 330 nm show emission in the UV and visible regions. Quenching of fluorescence emission intensity due to electron transfer is noticed while increasing the concentration of Glutathione in nanomolar(nM) range. Quenching of PL intensity due to adsorption-induced electron transfer is explained through band bending effect. These results indicate that zinc oxide nanoparticles can be implemented for optoelectronics, solar photocatalysts and glutathione sensing applications. Keywords Glutathione · Zinc oxide · Emission · Quenching
1 Introduction Light-matter interaction between exceedingly engineered nanoparticles and biomolecules has led to the development of a new type of biomolecular targets and biosensors [1]. Voluminous reports are available utilizing the biosensing property of nanoparticles for drug delivery, bio-imaging, luminescence tagging and immunoassays [2–7]. Metal oxide nanoparticles have excellent optical, electrical and magnetic properties. Hence, they have been employed as one of the potential element in the field of biosensors. Zinc oxide, a group II–VI compound is a versatile material with applications in optoelectronics [8], photonic
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-03780-3) contains supplementary material, which is available to authorized users. * Karthikeyan Balasubramanian [email protected] 1
Nanophotonics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620015, India
devices [9], photocatalysis [10], surface acoustic devices [11], varistors [12], nanogenerators [13], gas sensors [14], cotton fabrics [15]. Due to its easy compatibility, it is used widely in device fabrications. It is also used as biosensors due to its biomimetic property with high electron transfer processes [16]. The dimension and structure of Zn
Data Loading...
