Inkjet-Printed Flexible Ultrasensitive Chemiresistive Sensors for Aggregation Pheromone of Flour Beetles

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2023-11-08 DOI:10.1007/s13391-023-00466-9

Yunnan Fang, Manos M. Tentzeris

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Abstract

This work reports the first demonstration that a chemoresistive sensor can be used to detect the aggregation pheromone of flour beetles. To prepare the sensing element of such a sensor, a novel functionalization method was developed to amplify amine groups on the surface of carbon nanotubes (CNTs). Unlike traditional amine-amplification approaches in which amplification efficiency is significantly reduced by self-crosslinking, the current amine amplification process was self-crosslinking-free due to the use of a home-made compound in which amine groups were protected by Boc (tert-butyloxycarbonyl) protecting groups and could be deprotected as needed. The inkjet ink formulated from the functionalized CNTs, together with an amine-rich compound and a commercial silver nanoparticle-based inkjet ink, was used to fabricate (via inkjet-printing and drop-casting) lightweight, flexible, and miniature-sized chemiresistive sensors for 4,8-dimethyldecanal (DMD), a compound known to be the aggregation pheromone of several species of flour beetles. A home-built gas sensing system, including a commercial gas generator, a DMD permeation tube with its emission rate certified, a data-acquisition system, and some home-developed LabVIEW-based programs, was utilized to perform the DMD sensing trials. The sensors showed ultra-high sensitivity to synthetic aggregation pheromone DMD, as indicated by their prompt and significant responses to 100 ppb DMD vapor. A mechanism for the sensitive sensing of DMD is proposed.

Graphical Abstract

Abstract Image

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喷墨打印柔性超灵敏化学电阻传感器用于检测面粉甲虫的聚集信息素

这项研究首次证明化学电阻传感器可用于检测面粉甲虫的聚集信息素。为了制备这种传感器的传感元件，我们开发了一种新的功能化方法来放大碳纳米管（CNT）表面的胺基团。传统的胺放大方法会因为自交联而大大降低放大效率，而目前的胺放大过程与之不同，由于使用了一种自制化合物，其中的胺基团受到 Boc（叔丁氧羰基）保护基团的保护，可以根据需要解除保护，因此不存在自交联问题。由功能化碳纳米管配制的喷墨墨水、富含胺的化合物和基于银纳米粒子的商用喷墨墨水被用于制造（通过喷墨打印和滴注）轻质、柔性和微型尺寸的化学电阻传感器，用于检测 4,8-二甲基癸醛 (DMD)，已知该化合物是几种面粉甲虫的聚集信息素。自制的气体传感系统包括一个商用气体发生器、一个经过排放率认证的 DMD 渗透管、一个数据采集系统和一些自己开发的基于 LabVIEW 的程序，用于进行 DMD 传感试验。传感器对合成聚集信息素 DMD 的灵敏度极高，对 100 ppb DMD 蒸汽的反应迅速而显著。本文提出了一种灵敏感应 DMD 的机制。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.