Facile fabrication of high-performance QCM humidity sensor based on layer-by-layer self-assembled polyaniline/graphene oxide nanocomposite film

Zhang, Dongzhi; Wang, Dongyue; Li, Peng; Zhou, Xiaoyan; Zong, Xiaoqi; Dong, Guokang

doi:10.1016/j.snb.2017.08.212

Cited by 312 publications

(118 citation statements)

References 45 publications

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“…In addition, the calcium vacancies also increase the humidity sensitivity of HAp. When relative humidity increased above 43%, the HAp humidity sensor shown a good linear sensing characteristics due to the abundant hydroxyl groups exposed on the surface of HAp …”

Section: Resultsmentioning

confidence: 99%

A Rapid Response/Recovery Ribbon‐like Hydroxyapatite Humidity Sensor with Loose Spatial Structure

Sun

et al. 2019

ChemistrySelect

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A rapid response/recovery ribbon‐like hydroxyapatite (HAp) humidity sensor with loose spatial structure has been fabricated in this work. The HAp film was prepared on polyethylene terephthalate‐indium tin oxide (PET‐ITO) interdigital substrate by electrochemical deposition method. The HAp film was characterized by XRD, SEM, FTIR techniques. Electrochemically deposited HAp has a preferred orientation in a‐plane, which exposes a great many of hydroxyl groups. The HAp has a flat ribbon‐like microstructure that effectively captures and detects water molecules. The gap of the interdigital electrode was filled with long ribbon‐like HAp to form a loose spatial structure which facilitates water molecules adsorption and desorption. The HAp humidity sensor showed high sensitivity, low hysteresis and good linearity. In particular, HAp sensor has a short response time of 0.9 s and recovery time of 5.6 s. Besides, the humidity sensing mechanism of HAp sensor was also investigated in detail.

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Section: Resultsmentioning

confidence: 99%

A Rapid Response/Recovery Ribbon‐like Hydroxyapatite Humidity Sensor with Loose Spatial Structure

Sun

et al. 2019

ChemistrySelect

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“…Novel low-humidity sensors were investigated by the in situ photopolymerization of PPY/Ag/TiO 2 nanoparticle composite thin film coating on QCM [224]. Room temperature highly sensitive sensors with short response/recovery time for humidity based on GO/SnO 2 /PANI and PANI-GO coating on QCM were explored by Zhang et al [225,226]. The adsorption process of water molecules on QCM senor was carefully discussed using Langmuir adsorption isotherm model.…”

Section: Quartz Crystal Microbalancementioning

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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“…By deposition on an appropriate sensing chip, the microbalance responds to specific analytes via a frequency shift, which results from the mass increase caused by sorption of analytes onto the sensing material, according to the Sauerbrey equations (Sauerbrey 1959). Various sensing materials such as polymers Rianjanu et al 2019b), metal oxides (Zhang et al 2018, and some functional materials (Lu et al 2015) have been introduced to modify QCM sensors.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Safrole Sensing Performance of a Polyacrylonitrile Nanofiber- Based-QCM Sensor by Overlaying with Chitosan

Rianjanu¹,

Triyana²,

Nurbaiti³

et al. 2019

JSM

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We report on a method to enhance the sensing performance of polyacrylonitrile (PAN) nanofiber-based QCM sensor overlaid with chitosan. The PAN nanofibers were deposited on the QCM sensing surface by electrospinning technique followed by overlay with chitosan by a drop-casting method. The Fourier transform infrared (FTIR) spectra confirm that chitosan covers the PAN nanofibers. The SEM images show the average diameter of the produced PAN nanofibers was 236 nm, and it increased to 283 nm after overlay with chitosan. The modified QCM sensor has the sensitivity of 18.7 Hz mg -1 L, which is better than that of PAN nanofiber alone of 4.5 Hz mg -1 L. It is an increase nearly 5 times. The analytical parameters of the limit of detection (LOD), sensitivity, a time constant, and stability improved after the PAN nanofiber sensor was overlaid with chitosan. The amine groups present in chitosan interact effectively with safrole, thus increase the sensing response. The proposed device is robust, inexpensive, and convenient for detecting safrole, and can be used as an alternative to those of classical instrumental methods for the analysis of safrole as a drug precursor. ABSTRAK Kajian ini melaporkan tentang kaedah untuk meningkatkan prestasi pengesanan poliakrilonitril (PAN) berasaskan sensor gentian nano QCM yang disaluti dengan kitosan. PAN nanofiber diendap pada permukaan pengesan QCM oleh teknik putaran elektro diikuti dengan salutan kitosan melalui kaedah drop-pemutus. Spektrum transformasi Fourier inframerah (FTIR) mengesahkan kitosan menutup gentian nano PAN. Imej SEM menunjukkan diameter purata gentian nano PAN yang dihasilkan adalah 236 nm dan ia meningkat kepada 283 nm selepas bertindih dengan kitosan. Sensor QCM terubah suai mempunyai kesensitifan 18.7 L mg -1 Hz, lebih baik daripada gentian nano PAN sahaja iaitu 4.5 Hz mg -1 L. Ini merupakan peningkatan hampir 5 kali ganda. Analisis parameter had pengesanan (LOD), kesensitifan, pemalar masa dan kestabilan bertambah baik selepas sensor gentian nano PAN disaluti dengan kitosan. Golongan amina yang hadir dalam kitosan berinteraksi secara berkesan dengan safrola, sekaligus meningkatkan respons pengesanan. Peranti cadangan ini teguh, murah dan mudah untuk mengesan safrola dan boleh digunakan sebagai alternatif kepada metod instrumen klasik untuk menganalisis safrola sebagai pelopor dadah.

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Facile fabrication of high-performance QCM humidity sensor based on layer-by-layer self-assembled polyaniline/graphene oxide nanocomposite film

Cited by 312 publications

References 45 publications

A Rapid Response/Recovery Ribbon‐like Hydroxyapatite Humidity Sensor with Loose Spatial Structure

A Rapid Response/Recovery Ribbon‐like Hydroxyapatite Humidity Sensor with Loose Spatial Structure

Gas Sensors Based on Conducting Polymers

An Enhanced Safrole Sensing Performance of a Polyacrylonitrile Nanofiber- Based-QCM Sensor by Overlaying with Chitosan

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