Hybridization of silicon nanowires with TeO2 branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing

Bang, Jin Ho; Choi, Myung Sik; Mirzaei, Ali; Han, Seungmin; Lee, Ha Young; Choi, Sugy; Kim, Sang Sub; Kim, Hyoun Woo

doi:10.1016/j.apsusc.2020.146620

Cited by 15 publications

(14 citation statements)

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“…The modulations of the potential barrier at the Si-TeO 2 heterojunctions and the last one is catalytic effect of Pd NPs (R 4 ). In a report from Bang et al, a toluene (C 7 H 8 ) sensor using SiNW-TeO 2 heterostructure sensitized with Pt NPs was demonstrated [176]. Ag-MACE process was employed to fabricate SiNWs and then dense TeO 2 branches formed on the NWs followed by uniformly sputtering of Pt layers onto the surface.…”

Section: Integration Of Multiple Functionalization Methodsmentioning

confidence: 99%

“…The enhancement of response due to Pt is attributed to several reasons e.g., the spillover effect (R 1 ); active reaction site generation in interfaces of SiNWs, TeO 2 , and PtNPs; modulation of the potential barriers formed at the heterojunction interfaces between SiNWs and TeO 2 as well as TeO 2 and PtNPs (R 2 , R 4 ). Furthermore, more detailed investigations showed the other cause behind the enhancement of response is homojunction interfaces of SiNWs and TiO 2 NWs (R 2 , R 3 ), and enhancement of chemisorption and dissociation effect of C 7 H 8 [176]. Although this sensor shows good sensitivity with proper selectivity and repeatability, it still suffers from operating at high temperature as 200 • C which results in more energy consumption.…”

Section: Integration Of Multiple Functionalization Methodsmentioning

confidence: 99%

“…(c) Schematic diagram showing the four resistance mechanisms operating in Pd-functionalized branched nanowires: (R 1 ) modulation of depletion width along the branched TeO 2 nanowires (including additional Pt effects), (R 2 ) modulation of the potential barrier at networked homojunctions between branched TeO 2 nanowires, (R 3 ) modulation of the potential barrier at boundaries of the nanograins, and (R 4 ) modulation of the potential barrier at Si-TeO 2 heterojunctions. Reproduced from[176], with permission from Elsevier, 2020.…”

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confidence: 99%

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Silicon Nanowires for Gas Sensing: A Review

et al. 2020

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The unique electronic properties of semiconductor nanowires, in particular silicon nanowires (SiNWs), are attractive for the label-free, real-time, and sensitive detection of various gases. Therefore, over the past two decades, extensive efforts have been made to study the gas sensing function of NWs. This review article presents the recent developments related to the applications of SiNWs for gas sensing. The content begins with the two basic synthesis approaches (top-down and bottom-up) whereby the advantages and disadvantages of each approach have been discussed. Afterwards, the basic sensing mechanism of SiNWs for both resistor and field effect transistor designs have been briefly described whereby the sensitivity and selectivity to gases after different functionalization methods have been further presented. In the final words, the challenges and future opportunities of SiNWs for gas sensing have been discussed.

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Section: Integration Of Multiple Functionalization Methodsmentioning

confidence: 99%

Section: Integration Of Multiple Functionalization Methodsmentioning

confidence: 99%

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confidence: 99%

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Silicon Nanowires for Gas Sensing: A Review

et al. 2020

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“…To discriminate the volatile toluene, α-Fe 2 O 3 /SnO 2 NW arrays and Pt NPs sensitized Si NW-TeO 2 NWs (opted from ultrasonic spray pyrolysis, hydrothermal, and sputtering tactics) were proposed with sensor responses >40 at 90 • C and 200 • C, respectively, as noted in Table 4 [358,359]. Such NWs-based sensory research is noted as an innovative one.…”

Section: Volatile Hydrocarbons Detection By Distinct Nanostructuresmentioning

confidence: 99%

Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing

Shellaiah

Sun

2021

Sensors

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Environmental pollution related to volatile organic compounds (VOCs) has become a global issue which attracts intensive work towards their controlling and monitoring. To this direction various regulations and research towards VOCs detection have been laid down and conducted by many countries. Distinct devices are proposed to monitor the VOCs pollution. Among them, chemiresistor devices comprised of inorganic-semiconducting materials with diverse nanostructures are most attractive because they are cost-effective and eco-friendly. These diverse nanostructured materials-based devices are usually made up of nanoparticles, nanowires/rods, nanocrystals, nanotubes, nanocages, nanocubes, nanocomposites, etc. They can be employed in monitoring the VOCs present in the reliable sources. This review outlines the device-based VOC detection using diverse semiconducting-nanostructured materials and covers more than 340 references that have been published since 2016.

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“…Anhydrides were further converted into adsorbed H 2 O and CO species, and the latter could react with adsorbed oxygen to produce CO 2 . The presence of - CH 3 plays an important role in the detection of toluene, as toluene can adsorb on the surface through this group [ 118 ]. Kim et al [ 119 ] reported the H 2 S gas-sensing properties of CuO-decorated SnO 2 -ZnO C-S NWs with different shell thicknesses in the self-heating mode.…”

Section: Self-heated Gas Sensorsmentioning

confidence: 99%

State-of-the-Art Research on Chemiresistive Gas Sensors in Korea: Emphasis on the Achievements of the Research Labs of Professors Hyoun Woo Kim and Sang Sub Kim

Navale

Mirzaei

Majhi

et al. 2021

Sensors

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This review presents the results of cutting-edge research on chemiresistive gas sensors in Korea with a focus on the research activities of the laboratories of Professors Sang Sub Kim and Hyoun Woo Kim. The advances in the synthesis techniques and various strategies to enhance the gas-sensing performances of metal-oxide-, sulfide-, and polymer-based nanomaterials are described. In particular, the gas-sensing characteristics of different types of sensors reported in recent years, including core–shell, self-heated, irradiated, flexible, Si-based, glass, and metal–organic framework sensors, have been reviewed. The most crucial achievements include the optimization of shell thickness in core–shell gas sensors, decrease in applied voltage in self-heated gas sensors to less than 5 V, optimization of irradiation dose to achieve the highest response to gases, and the design of selective and highly flexible gas sensors-based WS2 nanosheets. The underlying sensing mechanisms are discussed in detail. In summary, this review provides an overview of the chemiresistive gas-sensing research activities led by the corresponding authors of this manuscript.

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Hybridization of silicon nanowires with TeO2 branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing

Cited by 15 publications

References 95 publications

Silicon Nanowires for Gas Sensing: A Review

Silicon Nanowires for Gas Sensing: A Review

Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing

State-of-the-Art Research on Chemiresistive Gas Sensors in Korea: Emphasis on the Achievements of the Research Labs of Professors Hyoun Woo Kim and Sang Sub Kim

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