Sensing the aroma of Jasmine and evaluating its quality is an important commercial activity. Aroma of Jasmine has unique fragrance and high economic value. Assessing the quality of such aromas has created lot of interest in researchers. Use of passive sensors in E-noses for floral aroma sensing is available in literature. For the first time, an active device such as FET is tried for Jasmine aroma sensing. A junction field effect transistor (JFET) is fabricated and tested as sensor for jasmine aroma. Sensitivity of JFET to jasmine aroma is found to be 1.5 to 4 times higher than resistive film reported in literature. This paper presents method of fabrication of JFET, experimental procedure for measuring aroma of Jasmine flower, effect of operating in different regions of JFET on aroma sensing; repeatability of the sensor. The sensor developed is useful in evaluating quality of aroma of jasmine flower and to find the time at which flowers can be harvested and taken for extraction.

Aroma, Jasmine, quality, evaluation, FET, PEDOT: PSS

[1] George F. Fine, Leon M. Cavanagh, Ayo Afonja and Russell Binions, “Metal Oxide Semi-Conductor Gas Sensors in Environmental Monitoring”, Sensors 2010, 10, pp. 5469-5502; ISSN 1424-8220 doi:10.3390/s100605469.
[2] R. Ramamoorthy, P. K. Dutta, S. A. Akbar, “Oxygen sensors: Materials, methods, designs and applications”, Chemical sensors, Journal of Materials Science, 38 (2003), pp. 4271 – 4282.
[3] Haoshuang Gu, Zhao Wang and Yongming Hu, “Hydrogen Gas Sensors Based on Semiconductor Oxide Nanostructures”, Sensors 2012, 12, pp. 5517-5550; ISSN 1424-8220.
[4] Malik Abid Mahmood, Muhammad Saeed and Naveed Ahmad, “Quantitative and Qualitative Analysis of Essential Oil of Arabian Jasmine (Jasminum sambac) Flowers Harvested from Pothohar Region of Pakistan”, Journal of Ornamental Plants, Volume 7, Number 1: 17-24, March, 2017, ISSN(Print): 2251-6433, ISSN(Online): 2251-644117.
[5] Hena Ray, Nabarun Bhattacharyya, Alokesh Ghosh, Bipan Tudu, Rajib Bandyopadhyay, Arunangshu Ghosh, et.al., “Fragrance Profiling of Jasminum Sambac Ait. Flowers Using Electronic Nose”, IEEE Sensors Journal, Vol. 17, No. 1, January 1, 2017.
[6] Sajad Kiani, Saeed Minaee, Mahdi Ghasemi-Varnamkhasti, “A portable electronic nose as an expert systemfor aroma-based classification of saffron”, Chemometrics and Intelligent Laboratory Systems • May 2016.
[7] Sook-Hyun Hwang, Mi-Seon Kim, Pue-Hee Park and So-Young Park, “Scent Analysis Using an Electronic Nose and Flowering Period of Potted Diploid and Tetraploid Cymbidium”, Korean J. Hortic. Sci. Technol. 34(1):163-171, 2016.
[8] Kouki Fujioka, Mika Shirasu et. al., “Objective Display and Discrimination of Floral Odors from Amorphophallus titanum, Bloomed on Different Dates and at Different Locations, Using an Electronic Nose”, Sensors 2012, 12, 2152-2161; ISSN 1424-8220;doi:10.3390/s120202152.
[9] S. Mitachi, K. Sasaki, M. Kondoh and I. Sugimoto, “Odor Sensing in Natural Environment Using Quartz Crystal Resonators: Application to Aroma Sensing of Roses Cultivated in an Outside Garden”, School of Bionics, Tokyo University of Technology 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan.
[10] Seiichi Fukai, Yoshie Abe, “Discrimination of Lily fragrance by use of an electronic nose”, Proc. XX EUCARPIA Symp. on New Ornamentals II, Eds. J. Van Huylenbroeck et al. Acta Hort. 572, ISHS 2002.
[11] R Paul Wali, “An electronic nose to differentiate aromatic flowers using a real-time information-rich piezoelectric resonance measurement”, 2nd International Conference on Bio-Sensing Technology, Procedia Chemistry 6 ( 2012 ) 194 – 202.
[12] S. Bindu, R. Anil Kumar and M. S. Suresh, “Development of Technique for Making Ohmic Contacts to PEDOT-PSS Films”, Lecture Notes in Electrical Engineering 258, DOI: 10.1007/978-81-322-1524-0_28, Springer India 2013.
[13] Rekha P, M S Suresh, Vrunda Kusanur, “SENSOR FOR MEASURING AROMA OF JASMINE”, International Conference IEEE SENSORS 2018, 28th October to 31st October 2018, 978-1-5386-4707-3/18/$31.00 ©2018 IEEE.