Abstract
We have synthesized a nanocomposite consisting of crystalline tin oxide (SnO2) nanoparticles and polyaniline (PANI) by in-situ polymerization and composite formation (IPCF). The structure and morphology was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The nanocomposite is shown to represent a viable material for electrical resistivity based sensing of humidity in the 5 to 90 % relative humidity (RH) range. The electrical resistance of the composite linearly decreases from 127.5 to 11.5 kΩ with humidity from 5 to 95 %. The sensitivity is 0.22 % RH‾1, the response time is 26 s, and the recovery time is 30 s. The fabrication of SnO2/PANI composite combines the high sensitivity of SnO2 towards moisture with good electrical conductivity of PANI, which influences the electronic properties of the material and enables the design of more efficient humidity sensors. The water vapor layering growth kinetics on the composite was investigated by isothermal thermogravimetric analysis and an interaction with limited diffusion aggregate type kinetics has been proposed.
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References
Fraden J (2010) Handbook of modern sensors physics, designs, and applications, 3rd edn. Springer, New York
Chen Z, Lu C (2005) Humidity sensors: a review of materials and mechanisms. Sens Lett 3:274–295
Fernandez-Garcıa M, Martınez-Arias A, Hansonand JC, Rodriguez JA (2004) Nanostructured oxides in chemistry: characterization and properties. Chem Rev 104:4063–4104
Shukla SK, Parashar GK, Mishra AP, Mishra P, Yadav BC, Shukla RK, Bali LM, Dubey GC (2004) Nano-like magnesium oxide films and its significance in optical fiber humidity Sensor. Sens Actuators B 98:5–11
Shukla SK, Tiwari A, Parashar GK, Mishra AP, Dubey GC (2009) Exploring fiber optic approach to sense humid environment over nano-crystalline zinc oxide film. Talanta 80:565–571
Shukla SK, Bharadvaja A, Tiwari A, Parashar GK, Mishra AP, Dubey GC (2012) Fabrication of ultra-sensitive optical fiber based humidity sensor using TiO2 thin film. Adv Mater Lett 3:365–370
Yiheng QY, Howlader MR, Deen MJ, Haddara YM, Selvaganapathy PR (2014) Polymer integration for packaging of implantable sensors. Sens Actuators B 202:758–778
Ramprasad AT, Rao V (2010) Chitin-polyaniline blend as a humidity sensor. Sens Actuators B 148:117–125
Shukla SK (2013) Synthesis and characterization of polypyrrole grafted cellulose for humidity sensing. Int J Biol Macromol 62:531–536
Su P-G, Huang L-N (2007) Humidity sensors based on TiO2 nanopaticles/polypyrrole composite thin films. Sens Actuators B 123:501–507
Shukla SK, Vamakshi, Minakshi, Bharadavaja A, Shekhar A, Tiwari A (2012) Fabrication of electro-chemical humidity sensor based on zinc/polyaniline nanocomposites. Adv Mater Lett 3:421–425
Shukla SK (2012) Synthesis of polyaniline grafted cellulose suitable for humidity sensing. Ind J Eng Mater Sci 19:417–420
Shukla SK, Bharadvaja A, Tiwari A, Pilla S, Parashar GK, Dubey GC (2010) Synthesis and characterization of highly crystalline polyaniline film promising for humid sensor. Adv Mater Lett 1:129–134
Quang Q, Lao C, Wang ZL, Xie Z, Zhang ZL (2007) High-sensitivity humidity sensor based on a single SnO2 nanowire. J Am Chem Soc 129:6070–6071
Singla ML, Awasthi S, Srivastava A (2007) Humidity sensing: using polyaniline/Mn3O4 composite doped with organic/inorganic acid. Sens Actuators B 127:580–585
Ying Z, Wan Q, Song ZT, Feng SL (2004) SnO2 nanowhiskers and their ethanol sensing characteristics. Nanotechnology 15:1682
Peng Z, Shi Z, Liu M (2000) Mesoporous Sn-TiO2 nanocomposite electrodes for lithium batteries. Chem Commun 21:2125–2126
Aoki A, Sasakura H (1970) Tin oxide thin film transistors. J Appl Phys 9:582–584
Ma N, Suematsu K, Yuasa M, Kida T, Shimanoe K (2015) Effect of water vapor on Pd-loaded SnO2 nanoparticles gas sensor. ACS Appl Mater Interfaces 7:5863–5869
Bing Y, Zeng Y, Liu C, Qiao L, Sui Y, Zou B, Zheng W, Zou G (2014) Assembly of hierarchical ZnSnO3 hollow microspheres from ultra-thin nanorods and the enhanced ethanol-sensing performances. Sens Actuators B 190:370–377
Murugan C, Subramanian E, Pathinettam DP (2014) Enhanced sensor functionality of in situ synthesized polyaniline–SnO2 hybrids toward benzene and toluene vapors. Sens Actuators B 205:74–81
Parvatikar N, Jain S, Khasim S, Revansiddapp M, Bhoraskar SV, Prasad A (2006) Electrical and humidity sensing properties of polyaniline/WO3 composite. Sens Actuators B 114:599–603
Assay DB, Kim SH (2005) Evolution of the adsorbed water layer structure on silicon oxide at room temperature. J Phys Chem B 109:16760–16763
Li Q, Li Y, Yang M (2012) Investigation on the sensing mechanism of humidity sensor based on electrospun polymer nanofibers. Sens Actuators B 171–172:309–314
Barsan N, Schweizer-Berberich M, Göpel W (1999) Fundamental and practical aspects in the design of nanoscaled SnO2 gas sensor: a status report. Fresenius J Anal Chem 365:287–304
Rastogi RP, Shukla SK, Singh NB (2010) Synthesis of NiO nano crystal though nitrate eutectic melt. Ind J Eng Mater Sci 17:477–480
Korotchenkov G, Brynzari V, Dmitriev S (1999) Electrical behavior of SnO2 thin films in humid atmosphere. Sens Actuators B 54:197–201
Batzill M (2006) Surface science studies of gas sensing materials: SnO2. Sensors 6:1345–1366
Popova LI, Andreev SK, Gueorguiev VK, Stoyanov ND (1996) Pulse mode of operation of diode humidity sensors. Sens Actuators B 37:1–5
Mostafaei A, Zolriasatein A (2012) Synthesis and characterization of conducting polyaniline nanocomposites containing ZnO nanorods. Prog Nat Sci Mater Int 22:273–280
Shukla SK, Singh NB, Rastogi RP (2015) Nanosize SnO2 through nitrate eutectic mixture for humidity sensors. Emerg Mater Res 4(1):27–43
Zhuo M, Chen Y, Sun J, Zhang H, Guo D, Zhang H, Li Q, Wang T, Wan Q (2013) Humidity sensing properties of a single Sb doped SnO2 nanowire field effect transistor. Sens Actuators B 186:78–83
Agastino R, Favia P, Oehr C, Wertheimer MR (2005) Low-temperature plasma processing of materials: past, present and future. Plasma Process Polym 2:7–15
Gercher VA, Cox DF (1995) Water adsorption on stoichiometric and defective SnO2(110) surfaces. Surf Sci 322:177–184
Matsuguchi M, Umeda S, Sadaoka Y, Sakai Y (1998) Characterization of polymers for a capacitive-type humidity sensor based on water sorption behavior. Sens Actuators B 49:179–185
Ando M, Swart C, Pringsheim E, Mirsky VM, Wolfbeis OS (2005) Optical ozone-sensing properties of poly(2-chloroaniline), poly(N-methylaniline) and polyaniline films. Sems Actuators B 108:528–534
Acknowledgments
The authors wish to acknowledge the University Grant Commission (MRP. 8-3(47)/2011), New Delhi for generous financial support to carry out this work. SKS and ESA also acknowledge financial support from Global Excellence and Stature (GES) fellowship from the University of Johannesburg. Authors are thankful to the reviewers for their constructive comments to improve the quality of manuscript.
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Shukla, S.K., Shukla, S.K., Govender, P.P. et al. A resistive type humidity sensor based on crystalline tin oxide nanoparticles encapsulated in polyaniline matrix. Microchim Acta 183, 573–580 (2016). https://doi.org/10.1007/s00604-015-1678-2
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DOI: https://doi.org/10.1007/s00604-015-1678-2