Effect of particle size variation of Ag nanoparticles in Polyaniline composite on humidity sensing

Fuke, Madhavi V.; Kanitkar, P L; Kulkarni, Milind V.; Kale, Bharat B.; Aiyer, R. C.

doi:10.1016/j.talanta.2009.12.003

Cited by 64 publications

(31 citation statements)

References 30 publications

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“…On the other hand, the intrinsic properties of NPs (such as localized surface plasmon resonance or quantum confinement) also play an important role in optical humidity sensing . Previous work in our laboratory carried out using the metal–polymer nanocomposites Co–polyaniline and silver–poly(vinyl alcohol) as coatings on glass substrates and optical fibers, respectively, did not offer the required sensing parameters. Therefore, in the present work, we have used a sensing material in nanocomposite form, namely, n(ano)Ag/poly( N ‐vinylpyridine) (PVP) and n(ano)Ag/PVA.…”

Section: Introductionmentioning

confidence: 98%

Combination of polymeric substrates and metal–polymer nanocomposites for optical humidity sensors

Mahapure

Gangal

Aiyer

et al. 2018

J of Applied Polymer Sci

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This paper reports a combination of self-supported, 80-μm-thick polymeric substrates of poly(dimethyl siloxane), poly(methyl methacrylate), poly(vinyl alcohol) (PVA), and poly(N-vinylpyridine) (PVP) and nanocomposites, silver nanoparticle (nAg)/ 0.1% PVP (S1) and nAg/0.1% PVA (S2), for use in optical-transmission-type humidity sensors. Composites are synthesized by a chemical reduction method at optimum conditions, giving particle sizes of 5-10 nm and 10-20 nm, respectively, for nAg/0.1% PVP and nAg/ 0.1% PVA. Composite formation is confirmed using Fourier transform infrared spectroscopy (FTIR). The role of polymers in obtaining a smaller Ag particle size is studied using ultraviolet-visible spectroscopy and transmission electron microscopy. The nanocomposite is coated onto substrates either on a single side or on both sides by dip coating. The humidity response of nAg/0.1% PVP-0.1% PVP-nAg/0.1% PVP (S1-PVP-S1) sensors, measured using the direct optical transmission method, exhibits an enhancement in sensitivity [0.88 AE 0.04 (/% RH)] for the humidity range 6-94% RH and response (6 s) and recovery (8 s) times compared to nAg/0.1% PVP-PVP S1-PVP sensors and a linear response (R 2 ≥ 0.99). An attempt is made to explain the sensing process with the help of FTIR spectra in dry and humid environments.

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Section: Introductionmentioning

confidence: 98%

Combination of polymeric substrates and metal–polymer nanocomposites for optical humidity sensors

Mahapure

Gangal

Aiyer

et al. 2018

J of Applied Polymer Sci

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“…1,8,9,[13][14][15]18,20 To the best of our knowledge, there is no literature available comparing the humidity sensing performances and sensing mechanisms of one-dimensional PAni and PPy nanostructures. Accordingly, improving the performance of CP-based humidity sensors via the synthesis of nanostructures have gained so much attentions.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Humidity Sensing Performances of Polyaniline and Polypyrrole Nanostructures

2014

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This paper addresses the preparation of polyaniline (PAni) and polypyrrole (PPy) nanostructures as humidity sensor elements. The semicrystalline microstructure and chemical structure of synthesized PAni and PPy were studied by X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The morphology of these polymers was studied by scanning electron microscopy and transmission electron microscopy, indicating fibrillar and tubular nanostructures for PAni and PPy, respectively. The humidity sensing performances of sensors based on the prepared nanostructural PAni and PPy were investigated, and the sensing mechanisms of both systems have been discussed. The interesting reverse behaviors during humidity exposure of PAni-and PPy-based sensors in different water vapor concentrations have been comprehensively justified. The temperature dependency of the electrical conductivity for PAni and PPy samples was investigated. The UV-vis spectroscopy was used to study the effect of moisture on the electronic transport properties of PAni and PPy nanostructures. C Experimental MATERIALSThe aniline and pyrrole monomers, hydrochloric acid (HCl), ethanol, ammonium persulphate (APS, (NH 4 ) 2 S 2 O 8 ), and anhydrous iron (III) chloride (FeCl 3 ) were all purchased

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“…Fuke [122] has published the results of synthesis of Ag-polyaniline nano-composite for application in a fiber-based humidity sensor using wave absorption spectroscopy. The sensor has been tested and optimized by varying the size of silver particles and the cladding length.…”

Section: Optical Humidity Sensorsmentioning

confidence: 99%

Toward a New Generation of Photonic Humidity Sensors

Kolpakov

Gordon

Mou

et al. 2014

Sensors

118

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This review offers new perspectives on the subject and highlights an area in need of further research. It includes an analysis of current scientific literature mainly covering the last decade and examines the trends in the development of electronic, acoustic and optical-fiber humidity sensors over this period. The major findings indicate that a new generation of sensor technology based on optical fibers is emerging. The current trends suggest that electronic humidity sensors could soon be replaced by sensors that are based on photonic structures. Recent scientific advances are expected to allow dedicated systems to avoid the relatively high price of interrogation modules that is currently a major disadvantage of fiber-based sensors.

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Effect of particle size variation of Ag nanoparticles in Polyaniline composite on humidity sensing

Cited by 64 publications

References 30 publications

Combination of polymeric substrates and metal–polymer nanocomposites for optical humidity sensors

Combination of polymeric substrates and metal–polymer nanocomposites for optical humidity sensors

A Comparative Study on Humidity Sensing Performances of Polyaniline and Polypyrrole Nanostructures

Toward a New Generation of Photonic Humidity Sensors

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