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First example of engineered β-cyclodextrinylated MEMS devices for volatile pheromone sensing of olive fruit pests

Moitra, P and Bhagat, D and Kamble, VB and Umarji, AM and Pratap, R and Bhattacharya, S (2021) First example of engineered β-cyclodextrinylated MEMS devices for volatile pheromone sensing of olive fruit pests. In: Biosensors and Bioelectronics, 173 .

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Official URL: https://dx. doi.org/10.1016/j.bios.2020.112728

Abstract

Olive oil is more preferred than other vegetable oils because of the increasing health concern among people throughout the world. The major hindrance in large-scale production of olive oil is olive fruit pests which cause serious economic damage to the olive orchards. This requires careful monitoring and timely application of suitable remedies before pest infestation. Herein we demonstrate efficacious utilization of covalently functionalized β-cyclodextrinylated MEMS devices for selective and sensitive detection of female sex pheromone of olive fruit pest, Bactocera oleae. Two of the MEMS devices, silicon dioxide surface-micromachined cantilever arrays and zinc oxide surface-microfabricated interdigitated circuits, have been used to selectively capture the major pheromone component, 1,7-dioxaspiro5,5undecane. The non-covalent capture of olive pheromones inside the β-cyclodextrin cavity leads to the reduction of resonant frequency of the cantilevers, whereas an increase in resistance has been found in case of zinc oxide derived MEMS devices. Sensitivity of the MEMS devices towards the olive pheromone was found to be directly correlated with the increasing availability of β-cyclodextrin moieties over the surface of the devices and thus the detection limit of the devices has been achieved to a value as low as 0.297 ppq of the olive pheromone when the devices were functionalized with one of the standardized protocols. Overall, the reversible usability and potential capability of the suitably functionalized MEMS devices to selectively detect the presence of female sex pheromone of olive fruit fly before the onset of pest infestation in an orchard makes the technology quite attractive for viable commercial application. © 2020 Elsevier B.V.

Item Type: Journal Article
Publication: Biosensors and Bioelectronics
Publisher: Elsevier Ltd
Additional Information: Copyright to this article belongs to Elsevier Ltd
Keywords: Cyclodextrins; Fruits; II-VI semiconductors; Nanocantilevers; Natural frequencies; Orchards; Petroleum industry; Silica; Surface micromachining; Zinc oxide, Beta-cyclodextrin; Commercial applications; Detection limits; Large scale productions; Micromachined cantilever; Pheromone components; Potential capability; Sensitive detection, Olive oil
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Organic Chemistry
Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 12 Feb 2021 06:16
Last Modified: 12 Feb 2021 06:16
URI: http://eprints.iisc.ac.in/id/eprint/67163

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