Polypyrrole shell (nanoparticles)-functionalized silicon nanowires array with enhanced NH3-sensing response

Qin, Yuxiang; Cui, Zhenduo; Zhang, Tianyi; Liu, Diao

doi:10.1016/j.snb.2017.11.089

Cited by 37 publications

(28 citation statements)

References 47 publications

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“…Besides, various metals and/or metal oxides were also introduced to further enhance the response/recovery kinetics of the sensing materials. Chemiresistor gas sensing behavior of NH 3 based on nanostructured PPY/SnO 2 [141], PPY/ZnO [142][143][144], PPY/Zn 2 SnO 4 [145], PPY/Ag-TiO 2 [146], PPY/silicon nanowires (PPY/ SNWs) [147], PANI/SnO 2 [148], PANI/ZnO [149], PANI/In 2 O 3 [150], PANI/TiO 2 [151], PANI/flower-like WO 3 [152], PANI/SnO 2 /rGO [153], PANI-TiO 2 -Au [154], and Ag-AgCl/PPY [155] has recently been studied so far. The CP/metal oxide nanocomposite thin films exhibited an outstanding response time of 2 S for NH 3 at very low concentration of 50 ppb in air with respect to methanol and ethanol vapors [156].…”

Section: Polymer-absorption Sensors (Chemiresistors)mentioning

confidence: 99%

Gas Sensors Based on Conducting Polymers

Torad¹,

Ayad²

2020

Gas Sensors

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Since the discovery of conducting polymers (CPs), their unique properties and tailor-made structures on-demand have shown in the last decade a renaissance and have been widely used in fields of chemistry and materials science. The chemical and thermal stability of CPs under ambient conditions greatly enhances their utilizations as active sensitive layers deposited either by in situ chemical or by electrochemical methodologies over electrodes and electrode arrays for fabricating gas sensor devices, to respond and/or detect particular toxic gases, volatile organic compounds (VOCs), and ions trapping at ambient temperature for environmental remediation and industrial quality control of production. Due to the extent of the literature on CPs, this chapter, after a concise introduction about the development of methods and techniques in fabricating CP nanomaterials, is focused exclusively on the recent advancements in gas sensor devices employing CPs and their nanocomposites. The key issues on nanostructured CPs in the development of state-of-the-art miniaturized sensor devices are carefully discussed. A perspective on next-generation sensor technology from a material point of view is demonstrated, as well. This chapter is expected to be comprehensive and useful to the chemical community interested in CPs-based gas sensor applications.

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Section: Polymer-absorption Sensors (Chemiresistors)mentioning

confidence: 99%

Gas Sensors Based on Conducting Polymers

Torad¹,

Ayad²

2020

Gas Sensors

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“…The doping of different particles also affected by other organic vapors which are under examinaion (Zhang et al, 2010 ; Huang et al, 2015 ; Moret et al, 2016 ; Nayef and Khudhair, 2018 ). On the basis of fluorescence quenching of pSiNPs with other atoms, pSiNPs have been used for detection of different ions and molecules (Cu +2 , NO 2 , Hg 2+ , NH 3 , Ag 2+ , and ethyl carbamate) (Xia et al, 2013 ; Luo et al, 2018 ; Qin et al, 2018a , b ). PL immunosensor was prepared by functionalization of porous silicon with Protein-A and bovine serum albumin (BSA) for detection of Ochratoxin A under UV Laser as shown in Figure 7 .…”

Section: Applications Of Silicon-based Porous Nanomaterialsmentioning

confidence: 99%

Big Potential From Silicon-Based Porous Nanomaterials: In Field of Energy Storage and Sensors

et al. 2018

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Silicon nanoparticles (SiNPs) are the promising materials in the various applications due to their unique properties like large surface area, biocompatibility, stability, excellent optical and electrical properties. Surface, optical and electrical properties are highly dependent on particle size, doping of different materials and so on. Porous structures in silicon nanomaterials not only improve the specific surface area, adsorption, and photoluminescence efficiency but also provide numbers of voids as well as the high surface to volume ratio and enhance the adsorption ability. In this review, we focus on the significance of porous silicon/mesoporous silicon nanoparticles (pSiNPs/mSiNPs) in the applications of energy storage, sensors and bioscience. Silicon as anode material in the lithium-ion batteries (LIBs) faces a huge change in volume during charging/discharging which leads to cracking, electrical contact loss and unstable solid electrolyte interphase. To overcome challenges of Si anode in the LIBs, mSiNPs are the promising candidates with different structures and coating of different materials to enhance electrochemical properties. On the basis of optical properties with tunable wavelength, pSiNPs are catching good results in biosensors and gas sensors. The mSiNPs with different structures and modified surfaces are playing an important role in the detection of biomarkers, drug delivery and diagnosis of cancer and tumors.

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“…Conductive polymers have shown enormous potential in volatile organic compounds (VOCs) detection at room temperature as a result of their unique sensitivity, short response time and easy processing [23][24]. Polypyrrole (PPy) in particular has been widely used due to its outstanding chemical stability, redox properties, surface charge tunable characteristics, ease of chemical synthesis and light weight [25][26]. Moreover, obvious improvement of pyrrole dispersion is observed due to the self-assembled pyrrole monomers on rGO surface via π−π stacking and electrostatic interaction, which means that the combination of PPy and rGO are expected to have a synergistic effect on facilitating NH 3 sensing ability [27][28].…”

Section: Introductionmentioning

confidence: 99%