Preparation of zinc (II) nitrate poly acryl amide (PAAm) and its optoelectronic application for humidity sensing
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Preparation of zinc (II) nitrate poly acryl amide (PAAm) and its optoelectronic application for humidity sensing B. C. Yadav1 · S. Sikarwar1 · R. Yadav1 · P. Chaudhary1 · G. I. Dzhardimalieva2 · N. D. Golubeva2 Received: 30 September 2017 / Accepted: 14 February 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract The present paper reports the investigation of transmitted power through the nanostructured zinc (II) nitrate polyacrylamide deposited substrate to investigate the adsorption/desorption of humidity at room temperature. For this purpose, the precursor of Zn(NO3)2·(AAm)4·2H2O was prepared and used for the deposition of films on borosilicate flat substrates. The film was then investigated using SEM, XRD and UV–Vis absorption techniques. Scanning Electron Microscope showed the macroporous nature of the film with multiple pores in situ. XRD revealed the nature of monomer and polymer. Energy band-gap of the film was estimated as 3.865 eV by UV–Vis spectrophotometer. SAED confirmed the crystalline nature of the material. From Zeta nanosizer, the minimum range of particles was found as 5–20 nm. The film was employed as transmission based optoelectronic humidity sensor. Maximum sensitivity was found as 1.831 µW/%RH. Response and recovery times of the sensor were found as 250 and 37 s respectively. Experiments were repeated time to time and found that the sensor was ~ 96% stable after a long run. Thus the investigated opto-electronic sensor being polymeric is flexible in nature.
1 Introduction Nanoscale structures have attracted the researchers across the globe due to their unique properties, whether they are metal oxide framework, organic framework or metalorganic framework [1, 2]. The polymer matrix attracts a significant scientific and technological interest in the field of nanotechnology [3]. The synthesis of nanoparticles in a polymer matrix involves a lot of methods for confirming the conservation and stabilisation. The conversion of monomer to a polymer matrix can be done by the Frontal polymerization technique. This technique utilises the kinetic and dynamic properties of the polymeric materials including polyacrylamide [4, 5]. Polyacrylamide is a chemical compound that has the interesting property of being soluble in water. It is useful for the treatment of industrial wastewater. Polyacrylamide is a combination of polymers and * B. C. Yadav [email protected] 1
Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, UP 226025, India
Laboratory of Metallopolymers, Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russia 142432
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acrylamide (C3H5NO). Acrylamide due to its toxic nature adversely affects the nervous system so it must be handled by various protecting techniques [6]. Acrylamide is a highly water-soluble compound made from the hydration of acrylonitrile. It can be easily shown by titration, colorimetry and high-performance gas c
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