Quantum dot-based electronic nose chip and design method thereof

A design method and technology of quantum dots, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of low precision, low integration and high power consumption, and achieve the effect of improving the recognition accuracy

Active Publication Date: 2019-05-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a quantum dot-based electronic nose chip and its design method, in which through the overall design process of the key gas sensor array, and work with the gas sensor array Compared with the existing technology, the signal processing unit and the micro-control unit are improved in the setting mode and corresponding design mode, which can effectively solve the problems of high power consumption, low integration and low precision of the electronic nose chip. The design and design of the present invention The prepared quantum dot electronic nose chip can identify gas molecules with high sensitivity and specificity, and has autonomous processing capabilities

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  • Quantum dot-based electronic nose chip and design method thereof
  • Quantum dot-based electronic nose chip and design method thereof

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Embodiment 1

[0046] (1) Preparation of SnO 2 quantum dot material. where SnO 2 Quantum dots are made of SnCl 4 ·5H 2 O was used as tin source and synthesized by solvothermal method. Specifically, add 20ml oleic acid, 2.5ml oleylamine, 0.6g SnCl to a 50ml beaker 4 ·5H 2 O, ultrasonically stirred until the SnCl 4 ·5H 2 O is completely dissolved, then add 10ml of ethanol to it, continue ultrasonic stirring until the solution is uniformly dispersed, transfer the mixed solution to a stainless steel reaction kettle, react at 180°C for 8h, and then cool to room temperature through a cold water bath; collect the precipitate, and use Wash several times with absolute ethanol and toluene, disperse in toluene solution to obtain 20mg / ml SnO 2Quantum dot solution. (2) The quantum dot material is coated on the MEMS substrate to form a film by inkjet printing, and a resistive sensor unit is prepared. Based on this sensor unit, a MEMS sensor array is designed and prepared in combination with micro...

Embodiment 2

[0049] (1) Preparation of PbS quantum dot materials. Among them, Pbs quantum dots are synthesized by using PbO as a lead source, TMS as a sulfur source, and thermal injection. Specifically, 1.8 g of lead oxide, 6 mL of oleic acid, and 20 mL of octadecene were stirred in a three-necked flask at high speed, and the temperature of the precursor was raised to 120° C. after vacuuming. In the glove box, 280 uL of TMS was dissolved in 10 ml of octadecene with a pipette gun to prepare sulfur precursors. The sulfur precursor was quickly injected into the lead precursor in a nitrogen environment, reacted for 30 seconds and then placed in a cold water bath for rapid cooling. The precipitate was collected, washed several times with toluene acetone, and dispersed into n-octane solution to obtain a 20 mg / ml PbS quantum dot solution. (2) The quantum dot material is coated on the transistor to form a film by drop coating, and a sensor unit suitable for a field effect transistor is prepared....

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Abstract

The invention belongs to the technical field of semiconductor devices and integrated systems and discloses a quantum dot-based electronic nose chip and a design method thereof. The design method includes the following steps that: (1) a gas sensor array on the electronic nose chip is designed; and (2) a signal processing unit and a micro control unit are designed. The step (1) further includes thefollowing steps that: (1-1) with a quantum dot material adopted as an olfactory acceptor material, a quantum dot gas sensor unit is designed, specifically, a resistive or field effect transistor typesensor unit on a substrate is designed; and (1-2) a quantum dot sensor array of an MEMS or TFT device structure is designed based on the quantum dot gas sensor unit. According to the quantum dot-basedelectronic nose chip and the design method thereof of the invention adopted, the quantum dot material is adopted as the olfactory receptor material; the micro-nano gas sensor is designed and prepared; the sensor array is obtained on the basis of the MEMS and TFT device structure; and the MCU containing a pattern recognition algorithm, and the signal processing unit are integrated on the chip, andtherefore, the quantum dot-based electronic nose chip which has the advantages of high sensitivity , small size and low power consumption can be obtained.

Description

technical field [0001] The invention belongs to the technical field of semiconductor devices and integrated systems, and more specifically relates to a quantum dot-based electronic nose chip and a design method thereof. The electronic nose chip specifically uses quantum dots as gas-sensitive materials. Using this design method, the The gas sensor array, the MCU containing the pattern recognition algorithm and the signal processing unit are integrated on a chip system. Background technique [0002] Odor / gas molecules are extremely important chemical information in the objective world. There is an urgent need to improve the sensitivity, specificity and spatial-temporal resolution of gas detection methods in the fields of environmental Internet of Things, industrial and agricultural production, military defense and other fields. The electronic nose chip is an artificial olfactory system that uses gas sensor arrays and pattern recognition technology to imitate biological olfacto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 刘欢李华曜唐江胡志响张雨竹李龙刘竞尧田枝来杨剑弦
Owner HUAZHONG UNIV OF SCI & TECH
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