本文選題：柔性氣體傳感器 + 分辨氣體　； 參考：《吉林大學》2017年碩士論文

【摘要】：近年來,氣體傳感器在環(huán)境監(jiān)測、工業(yè)過程控制、清潔能源調(diào)配、醫(yī)療診斷等領(lǐng)域得到了廣泛的應用。此外,在室溫下工作的氣體傳感器是非常有吸引力的,因為它具有非常低的功耗,并且不需要用于高溫操作的加熱器,從而簡化了傳感器器件的制造,并降低了運行成本。目前,各種材料如金屬氧化物[1-3],有機半導體[4-8],碳納米管和石墨烯等,已被用于制作室溫氣體傳感器,從而推動了可穿戴傳感器的發(fā)展[9-12]。與傳統(tǒng)的室溫氣體傳感器相比,穿戴式氣體傳感器具有顯著的優(yōu)點包括優(yōu)良的懸垂性、柔軟性、耐久性、重量輕、成本低。最近,各種可穿戴式氣體傳感器已被廣泛研究。例如,Yun et al.報道采用靜電自組裝方法還原氧化石墨烯將其組裝到紗線上,該傳感器具有化學穩(wěn)定性、機械穩(wěn)定性和對二氧化氮氣體的高響應[13]�；诰燮惗□�/甲基混合酯和多壁碳納米管線狀氣體傳感器也被Kerdcharoen等人研究,可用于檢測氨氣[14]。此外,其他一些研究人員制作了人類安全和健康監(jiān)測可穿戴傳感器[15]。然而,基于上述氣體傳感器的一個重要問題是,在多種氣體共存的復雜條件下可能無法有效區(qū)分出目標氣體。為此,研究人員嘗試采用“one key to one lock”即“一種傳感器對應一種目標氣體”的方法來制備高性能的可穿戴氣體傳感器,從而有效區(qū)分目標氣體[17]。在這項工作中,我們描述了三種基于導電纖維的氣體傳感器以檢測不同的有毒氣體,分別為:尼龍繩作為柔性襯底和尼龍繩表面包裹單壁碳納米管(SWCNT),多壁碳納米管、單壁碳納米管@Zn O量子點(SWCNT重組@Zn O)。所制備的氣體傳感器具有良好的靈敏度、良好的可逆性、對甲醛、氨和乙醇的良好選擇性。同時,該柔性氣體傳感器在彎曲狀態(tài)下靈敏度并未降低,經(jīng)過多次退化實驗后該傳感器仍保持良好的性能,以此證明該傳感器可用于制作柔性可穿戴設備。在本論文中,我們提出了一種基于三種類型的可穿戴式氣體傳感器的多功能面罩,每個氣體傳感器對應一個獨立的、具有不同顏色的LED,分別為紅色,綠色和藍色。在初始狀態(tài)下,即多功能面罩的密封罩中沒有目標氣體時,傳感器的電阻不會改變且用于指示的LED燈處于黑暗狀態(tài)。當目標氣體注入密封蓋時,氣體傳感器的電阻將會出現(xiàn)一定程度的增大,同時LED將切換到發(fā)光狀態(tài)。通過氣體傳感器的三種不同指示狀態(tài),可以區(qū)分不同的目標氣體。
[Abstract]:In recent years, gas sensors have been widely used in the fields of environmental monitoring, industrial process control, clean energy allocation, medical diagnosis and other fields. In addition, gas sensors working at room temperature are very attractive because it has very low power consumption and does not need to be used for high temperature operating heaters, thus simplifying the sensor At present, various materials, such as metal oxide [1-3], organic semiconductor [4-8], carbon nanotube and graphene, have been used to make room temperature gas sensors, thus promoting the development of wearable sensor [9-12]. and the traditional room temperature sensor, the wearable gas sensor is significant. The advantages include fine drapability, softness, durability, light weight, and low cost. Recently, various wearable gas sensors have been widely studied. For example, Yun et al. reports that the electrostatic self assembly method is used to restore graphene oxide to the yarns by electrostatic self-assembly. The sensor has chemical stability, mechanical stability and nitrogen dioxide gas. The high response [13]. based on polyisobutyl methyleth / methyl mixed ester and multi walled carbon nanotube like gas sensors has also been studied by Kerdcharoen et al. Can be used to detect ammonia [14].. Other researchers have produced human safety and health monitoring wearable sensor [15]., however, an important question based on the above gas sensor The problem is that the target gas may not be effectively separated under the complex conditions of coexistence of various gases. Therefore, the researchers try to use "one key to one lock", "a sensor corresponding to a kind of target gas", to prepare high-performance wearable gas sensors, from which the target gas [17]. is effectively distinguished from the target gas. We describe three kinds of gas sensors based on conductive fiber to detect different toxic gases, the nylon ropes are coated with single wall carbon nanotubes (SWCNT), multi wall carbon nanotubes, and single walled carbon nanotubes @Zn O quantum dots (SWCNT recombination @Zn O) on the flexible substrate and nylon rope. The gas sensors prepared have good sensitivity, Good reversibility, good selectivity for formaldehyde, ammonia and ethanol. At the same time, the sensitivity of the flexible gas sensor is not reduced in the bending state. After many degenerate experiments, the sensor still maintains good performance, which proves that the sensor can be used in the manufacture of flexible wearable devices. In this paper, we propose a method based on this paper. A multi-functional mask for three types of wearable gas sensors, each of which corresponds to an independent, different color LED, red, green and blue. In the initial state, when there is no target gas in the seal cover of the multi-functional mask, the resistance of the sensor will not change and the LED lamp is in the dark. Dark state. When the target gas is injected into the seal cover, the resistance of the gas sensor will increase to a certain extent, and the LED will switch to the luminous state. The different target gases can be distinguished by the three different indication states of the gas sensor.

【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP212

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相關(guān)期刊論文 前2條

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本文編號：1791015