CN-116297698-B - Wireless flexible ethylene sensing detection device and method based on MXene printed electronic device

Abstract

The invention discloses a wireless flexible ethylene sensing detection device and method based on an MXene printing electronic device. The sensor comprises a flexible substrate, a printed MXene interdigital electrode, a printed MXene radio frequency antenna and an ethylene sensing modification layer. The MXene interdigital electrode is printed, the printed MXene radio frequency antenna is formed by one-step printing of silk screen printing without adding MXene ink, and the radio frequency antenna, the interdigital electrode and the sensing modification layer contained in the printed MXene radio frequency antenna form a radio frequency resonance network. The technology can respond to the ethylene concentration in the environment in real time and generate corresponding resonance parameter change, and meanwhile, the technology can be read out wirelessly through the mutual inductance principle. The method provides a new technical platform for wireless passive plant ethylene detection, and also provides an in-situ, real-time, simple and rapid sensing detection device for the plant wearable sensor in the application fields of accurate agriculture, food preservation and the like.

Inventors

• LIU QINGJUN
• LI XIN
• PAN JINGYING
• LU YANLI
• WU YUE
• Shi Zhenghan

Assignees

• 浙江大学

Dates

Publication Date

20260512

Application Date

20230113

Claims (8)

1. 1. The wireless flexible ethylene sensing detection device based on the MXene printing electronic device is characterized by comprising an MXene printing wireless flexible ethylene sensor, wherein the MXene printing wireless flexible ethylene sensor comprises a flexible substrate (1), a printing MXene interdigital electrode (2), a printing MXene radio-frequency antenna (3) and an ethylene sensing modification layer (4); the printing MXene interdigital electrode (2) and the printing MXene radio frequency antenna (3) are connected in series and printed on the flexible substrate (1), the ethylene sensing modification layer (4) is formed by dripping MXene in-situ reduction palladium nanoparticle solution on the surface of the printing MXene interdigital electrode (2) and drying and assembling the solution on the surface of the printing MXene interdigital electrode (2), the printing MXene interdigital electrode (2) and the printing MXene radio frequency antenna (3) are printed by MXene ink, the MXene ink is free of adding MXene ink, the preparation method is that ceramic phase titanium aluminum carbon powder is etched, the obtained precipitate is directly peeled off through shearing force generated by a vortex oscillator, the supernatant is removed after repeated vortex oscillation and centrifugal washing, the viscous ink-like precipitate is directly collected, the printing MXene radio frequency antenna (3) and the printing MXene interdigital electrode (2) and the ethylene sensing modification layer (4) form a radio frequency resonance network, the ethylene sensing modification layer (4) is used for selectively adsorbing ethylene and generating corresponding impedance change, the resonance circuit is printed with the MXene antenna (3), the resonance circuit is cooperated with the impedance change, the printed MXene radio frequency antenna (3) generates a wireless signal.
2. 2. The device of claim 1, wherein the solution of MXene in-situ reduction palladium nanoparticles is prepared by dropwise adding 2 mM pH =4 of PdCl 2 solution to 0.25 mg/mL of MXene, wherein the volume ratio of the solution of PdCl 2 to the solution of 0.25 mg/mL of MXene is 1:100-400, and reacting in situ to obtain the solution of MXene in-situ reduction palladium nanoparticles.
3. 3. The device according to claim 1, characterized in that the printed MXene radio frequency antenna (3) surface further comprises an antenna encapsulation layer.
4. 4. A device according to claim 3, characterized in that the antenna encapsulation layer comprises a PDMS encapsulation film (51) and a PET encapsulation film (52).
5. 5. The device according to claim 1, further comprising a portable network analyzer (8) for collecting wireless signals emitted by the printed MXene radio frequency antenna (3).
6. 6. The device according to claim 5, further comprising an intelligent terminal (9) for receiving and displaying the wireless signal collected by the portable network analyzer (8) and analyzing the release of ethylene.
7. 7. An ethylene sensing detection method, comprising: Adhering the MXene printing wireless flexible ethylene sensor (6) of any one of claims 1-6 on the surface of an object to be measured or in a package, and utilizing impedance change generated by an ethylene sensing modification layer (4) on ethylene to change electromagnetic parameters of a printing MXene radio-frequency antenna (3); and receiving a wireless signal sent by the printed MXene radio frequency antenna (3) by utilizing a mutual inductance principle, and analyzing the relationship between the wireless signal and the ethylene concentration to obtain the ethylene concentration of the object (7) to be measured.
8. 8. The method of claim 7, wherein the object to be measured is a plant.

Description

Wireless flexible ethylene sensing detection device and method based on MXene printed electronic device Technical Field The invention relates to an ethylene detection technology, in particular to a wireless flexible ethylene sensing detection device and method based on an MXene printing electronic device. Background Advances in flexible electronics have motivated the emerging field of plant wearable devices that facilitate in situ and continuous interfacing with plant surfaces to remotely monitor and control abiotic environmental factors, or plant biological responses. Particularly, the plant wearable sensor provides a very promising platform for solving the problem of radical mismatch between the rigid detection equipment and the surfaces of various curved plants, and is beneficial to the development of intelligent agriculture. Unlike fixed detection systems, which generally reflect the broad results of average environmental changes, plant wearable sensors can provide more localized perspectives to describe subtle changes in microclimate (humidity, temperature, illumination), mechanical growth, pesticides, and plant disease. Among them, ethylene is a widely accepted plant hormone, playing a key role in regulating plant growth, development, immunity and senescence. It is worth noting that tracking ethylene emissions from fruit plants is particularly important for regulating fruit ripening and harvesting, which is important for improving yield and avoiding agricultural wastage. Therefore, a plant wearable analytical tool for continuous and in situ ethylene detection would be invaluable. However, current methods based on gas chromatography-mass spectrometry (GC-MS) analysis lack flexibility and efficiency, while ethylene sensors generally suffer from poor sensitivity and selectivity, on the other hand, recently reported integrated plant wearable platforms are either inefficient to manufacture or require wired external devices for sensor reading, which hinders their scalable deployment and practical use. In recent years, the emerging family of two-dimensional (2D) transition metal carbides and nitrides, mxnes, has received great attention in the field of printed electronics due to its high conductivity, excellent hydrophilicity, stable dispersibility, suitable fluidization, and good mechanical strength. There have been significant efforts in direct ink printing of mxnes-based multi-function electronics, particularly in micro-supercapacitors, sensors, actuators, antennas, and the like. Among the various printing techniques, screen printing is particularly attractive when designing planar flexible electronic devices because it works conveniently, rapidly, and scalable to produce viscous MXene screen printing inks, employs chemical templates or adhesion promoters to increase the viscosity of the ink at the expense of the conductivity and cumbersome post-processing of the ink. However, the excellent gas-sensitive properties of MXene-based materials have not been fully utilized in the field of printed electronics. Notably, combining MXene with noble metal nanoparticles, functional polymers, or other 2D materials can provide a variety of sensitization mechanisms to enhance their gas response, highlighting a simple nano-platform for room temperature sensing. Disclosure of Invention The invention aims to overcome the defects of the prior art and products, and provides a wireless flexible ethylene sensing detection device and method based on an MXene printing electronic device so as to realize continuous, in-situ and real-time plant ethylene detection of a plant wearable. The aim of the invention is realized by the following technical scheme: The wireless flexible ethylene sensing detection device based on the MXene printing electronic device comprises an MXene printing wireless flexible ethylene sensor, wherein the MXene printing wireless flexible ethylene sensor comprises a flexible substrate, a printing MXene interdigital electrode, a printing MXene radio frequency antenna and an ethylene sensing modification layer, the printing MXene interdigital electrode and the printing MXene radio frequency antenna are connected in series and printed on the flexible substrate, and the ethylene sensing modification layer is formed by coating a solution of MXene in-situ reduction palladium nano particles on the surface of the printing MXene interdigital electrode in a dripping mode and drying and assembling the solution on the surface of the printing MXene interdigital electrode. The radio frequency antenna, the interdigital electrode and the sensing modification layer form a radio frequency resonance network, the ethylene sensing modification layer is used for selectively adsorbing ethylene and generating corresponding impedance change, the printed MXene interdigital electrode couples the impedance change into an antenna resonance loop and generates electromagnetic parameter change in cooperation with the printed MXene radio fre