Lanthanum oxide @ antimony-doped tin oxide with high gas sensitivity and selectivity towards ethanol vapor

Wang, Mengyun; Zhu, Lianfeng; Zhang, Changyue; Gai, Guo Sheng; Ji, Xuewu; Li, Baohua; Yao, Youwei

doi:10.1016/j.snb.2015.10.083

Cited by 16 publications

(10 citation statements)

References 32 publications

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“…Two important factors in sensor properties are sensitivity and selectivity [128–132]. In general, sensitivity depends on the sensor size, activity of the deposited CCTO toward the specific analyte, success in CCTO immobilization by retaining as much activity as possible [16], and also dopant [116].…”

Section: Application Of Ccto Thin Films As Sensorsmentioning

confidence: 99%

A Short Review on Copper Calcium Titanate (CCTO) Electroceramic: Synthesis, Dielectric Properties, Film Deposition, and Sensing Application

2016

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Electroceramic calcium copper titanates (CaCu3Ti4O12, CCTO), with high dielectric permittivities (ε) of approximately 105 and 104, respectively, for single crystal and bulk materials, are produced for a number of well-established and emerging applications such as resonator, capacitor, and sensor. These applications take advantage of the unique properties achieved through the structure and properties of CCTO. This review comprehensively focuses on the primary processing routes, effect of impurity, dielectric permittivity, and deposition technique used for the processing of electroceramics along with their chemical composition and micro and nanostructures. Emphasis is given to versatile and basic approaches that allow one to control the microstructural features that ultimately determine the properties of the CCTO ceramic. Despite the intensive research in this area, none of the studies available in the literature provides all the possible relevant information about CCTO fabrication, structure, the factors influencing its dielectric properties, CCTO immobilization, and sensing applications.

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Section: Application Of Ccto Thin Films As Sensorsmentioning

confidence: 99%

A Short Review on Copper Calcium Titanate (CCTO) Electroceramic: Synthesis, Dielectric Properties, Film Deposition, and Sensing Application

2016

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“…This large device-to-device deviation can be attributed to the displacement of PS microspheres under constant plasma bombarding, which leads to a disordered cross-linked network. In comparison with the various nanostructured SnO 2 prepared by other methods in Table 1, the crosslinked SnO 2 /NiO network exhibited comparable sensitivity [19,23,47,[49][50][51][52]. We also investigated the ethanol sensitivity of other MEMS compatible sensing materials in Table 1, such as DPN deposited Au/SnO 2 nanocomposites, ZnO nanowires grown on a MEMS microplate, and ZnO tetrapods deposited on a microheater [37,38,51].…”

Section: Gas-sensing Performancementioning

confidence: 99%

“…Typically, various nanostructured MOS including nanowires, nanoplates, hollow spheres, and heterostructures can greatly enhance the diffusion of analyte gases and facilitate the charge transport, leading to high sensitivity and fast sensing-recovery process [9][10][11][12][13][14][15][16][17][18]. However, most of the reported sensors are fabricated by drop-coating or screen printing the nanostructured MOS solution onto ceramic tubes or plates, which results in large sensor-to-sensor variations, large size, and high power consumption of 200-1000 mW [7,[19][20][21][22][23]. Another challenge is the agglomeration between nanostructures by strong van der Waals attractions, which leads to decreased sensitivity and low uniformity [24].…”

Section: Introductionmentioning

confidence: 99%

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

et al. 2020

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Nowadays, it is still technologically challenging to prepare highly sensitive sensing films using microelectrical mechanical system (MEMS) compatible methods for miniaturized sensors with low power consumption and high yield. Here, sensitive cross-linked SnO 2 :NiO networks were successfully fabricated by sputtering SnO 2 :NiO target onto the etched self-assembled triangle polystyrene (PS) microsphere arrays and then ultrasonically removing the PS microsphere templates in acetone. The optimum line width (~600 nm) and film thickness (~50 nm) of SnO 2 :NiO networks were obtained by varying the plasma etching time and the sputtering time. Then, thermal annealing at 500°C in H 2 was implemented to activate and reorganize the as-deposited amorphous SnO 2 :NiO thin films. Compared with continuous SnO 2 :NiO thin film counterparts, these cross-linked films show the highest response of 9 to 50 ppm ethanol, low detection limits (< 5 ppm) at 300°C, and also high selectivity against NO 2 , SO 2 , NH 3 , C 7 H 8 , and acetone. The gas-sensing enhancement could be mainly attributed to the creating of more active adsorption sites by increased stepped surface in cross-linked SnO 2 :NiO network. Furthermore, this method is MEMS compatible and of generality to effectively fabricate other cross-linked sensing films, showing the promising potency in the production of low energy consumption and wafer-scale MEMS gas sensors.

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“…As one of the most investigated material of gas sensors, tin dioxide (SnO 2 ) has attracted much attention for a long time due to its low cost and good sensitivity to the target gas. [1][2][3][4] While a conventional gas sensor detects the gas concentration at a single location, there exist many applications where the distribution and flow of gases are of interest. On a macroscopic scale, a simple approach is to use an array of sensors for spatially resolved measurement of gas concentration.…”

Section: Introductionmentioning

confidence: 99%

A Gas‐Sensitive SPIM Sensor for Detection of Ethanol Using SnO₂ as Sensing Element

Wang

Truong

Werner

et al. 2019

Physica Status Solidi (a)

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In this study, a gas‐sensitive scanning photo‐induced impedance microscopy (SPIM) sensor using tin dioxide (SnO2) as sensing element is proposed, which detects the local impedance change on the sensor surface in response to ethanol vapor. The impedance change of the SnO2 film is detected by monitoring the AC photocurrent signal induced by a laser beam. This measurement can be done in a spatially resolved manner by using a scanning laser beam and two‐dimensional maps are obtained thanks to the light‐addressability of SPIM. This technique is expected to be applied to the visualization of gas distributions on the sensing surface.

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Lanthanum oxide @ antimony-doped tin oxide with high gas sensitivity and selectivity towards ethanol vapor

Cited by 16 publications

References 32 publications

A Short Review on Copper Calcium Titanate (CCTO) Electroceramic: Synthesis, Dielectric Properties, Film Deposition, and Sensing Application

A Short Review on Copper Calcium Titanate (CCTO) Electroceramic: Synthesis, Dielectric Properties, Film Deposition, and Sensing Application

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

A Gas‐Sensitive SPIM Sensor for Detection of Ethanol Using SnO₂ as Sensing Element

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Lanthanum oxide @ antimony-doped tin oxide with high gas sensitivity and selectivity towards ethanol vapor

Cited by 16 publications

References 32 publications

A Short Review on Copper Calcium Titanate (CCTO) Electroceramic: Synthesis, Dielectric Properties, Film Deposition, and Sensing Application

A Short Review on Copper Calcium Titanate (CCTO) Electroceramic: Synthesis, Dielectric Properties, Film Deposition, and Sensing Application

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

A Gas‐Sensitive SPIM Sensor for Detection of Ethanol Using SnO2 as Sensing Element

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A Gas‐Sensitive SPIM Sensor for Detection of Ethanol Using SnO₂ as Sensing Element