Bacterial cellulose coated ST-cut quartz surface acoustic wave humidity sensor with high sensitivity, fast response and recovery

Wang, J L; Guo, Yuanjun; Li, D J; Long, G. D.; Tang, Qingbo; Zu, Xiaotao; Y, J; Du, Bo; Tang, Yongliang; Torun, Hamdi; Fu, Yong Qing

doi:10.1088/1361-665x/ab7842

Cited by 19 publications

(18 citation statements)

References 38 publications

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“…Thus, not only a novel highly stable humidity sensor was explored, but also a new application for BC was opened. A surface acoustic wave humidity sensor with improved sensitivity and selectivity was developed, Wang et al [69] first reported such a BC-based sensor, which exhibited enhanced sensitivity, fast response, and superior repeatability for humidity sensing. In addition, different BC sensing materials to detect steam also have been reported [70] (Figure 6d).…”

Section: Humidity Sensingmentioning

confidence: 99%

Recent Advances in Functional Bacterial Cellulose for Wearable Physical Sensing Applications

Huang

Zhao

Hao

2021

Adv Materials Technologies

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The development of novel physical sensors mainly depends on the exploitation of sensing materials and the growth of sensing technologies. However, the major challenges for next-generation physical sensing materials include wearable flexibility, miniaturization, biocompatibility, and environmentally friendly, which is committed to the exploration and utilization of eco-friendly materials for pursuing sustainable development. [9] Recently, various natural biomasses including cellulose, chitosan, and silk are promising in the fabrication of sensing materials for wearable devices. [10,11] Cellulose, the most abundant renewable biopolymer on the earth, is produced by plants and some microorganisms, which is extensively used in papermaking, food packaging, textile, and medical care. [12] Among them, bacterial cellulose (BC), with the same chemical structure as plant cellulose, is a kind of pure cellulose bio-synthesized by some certain microorganisms like the Acetobacter xylinum. [13] As a low-cost green material, BC can act as a substrate combined with active materials, which have been widely used in sensor and energy storage related areas. [14] The main advantages of BC as a substrate are renewability, biodegradability, biocompatibility, and possession of shape flexibility, mechanical strength, large specific surface area, and ultrafine fiber. [15,16] In addition, the porous network structure is conducive to the infiltration and combination of active materials on BC to form functional sensing materials, broadening the application of BC, and providing a new view for the development of flexible sensors. On the one hand, the orderly stacked crystalline regions formed by abundant hydrogen bonds endow BC excellent mechanical properties. [17] On the other hand, strong intramolecular and intermolecular hydrogen bonds make the network structure of BC quite tight and difficult to dissolve. [18] Therefore, there is limited development for the exploitation of BC-based functional sensing materials, and available fabrication strategies is needed to design and develop BC-based sensing materials.In fact, the development of cellulose-based sensors is attracting wide and increasing attention, and cellulose has been adopted to the construction of physical, bio, and chemical sensors individually or in combination with other materials. [4,19] A few review papers summarizing the progress on sensors deriving from cellulose have been published. [10,[19][20][21] Owing to the excellent properties of BC and the promising prospects in sensors, this review summarizes the recent advances in construction strategies and fabrication methods of BC-based Flexible physical sensors have attracted increasing attention due to their wide applications in human motion monitoring, human-machine interfaces, smart robots, and personalized medicine in recent years. As a natural biomass, bacterial cellulose (BC) plays an important role in the development of new generation sensors due to the low cost, renewability and biodegradability, 3D porous structure, mechan...

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Section: Humidity Sensingmentioning

confidence: 99%

Recent Advances in Functional Bacterial Cellulose for Wearable Physical Sensing Applications

Huang

Zhao

Hao

2021

Adv Materials Technologies

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“…1(d)] and recently, researchers have utilised this configuration to develop gas and humidity sensors. [11][12][13] For example, Pasupuleti et al 11 fabricated a langasite-based SAW resonator sensor with a GO-PEDOT:PSS nanocomposite coated in the region between the IDTs of the resonator for nitrogen dioxide sensing. 11) After coating, the insertion loss increased slightly but the response was not altered significantly and the quality factor decreased slightly.…”

Section: Introductionmentioning

confidence: 99%

Dual resonance modes in two-port SAW resonator sensors: an analysis through scattering matrix approach

Hong¹,

Mohanan²,

Ramakrishnan³

2022

Jpn. J. Appl. Phys.

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We report dual resonance modes occurring in two port surface acoustic wave (SAW) resonators attached with typical sensing film and investigated the significance in sensing applications. Two-port SAW resonators operating at 303 MHz frequency were modelled using the scattering matrix approach and resonance frequency characteristics of the resonators were studied for mass loading caused by an arbitrary film attached between the interdigital transducers (IDT) of the resonator. Depending on the mass loading, symmetric and antisymmetric modes occur around the near resonance frequency of the SAW device. Either a single-mode or both modes are dominant depending on the phase shift caused by the mass loading of the film. Choosing arbitrary film thickness could result in complexity to track the resonance frequency shift and degrade sensing performance. The approach used for analysis can aid to determine the optimum sensing film thickness for two port SAW resonator-based sensors that can exhibit better linearity.

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“…The sensor was made on a ST-cut quartz substrate which has a low temperature coefficient of frequency (TCF). However, the performance was poorly affected with changes in humidity, because the amine groups of PEI and the hydroxyl groups of BC have strong adsorptions of H2O molecules [20,21], thus causing significant mass loading.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic metal organic framework for enhancing performance of acoustic wave formaldehyde sensor based on polyethyleneimine and bacterial cellulose nanofilms

Wang

Shang

Guo

et al. 2021

J Mater Sci: Mater Electron

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A surface acoustic wave (SAW) formaldehyde gas sensor was fabricated on a 42°75' ST-cut quartz substrate, with a composite sensing layer of zeolitic imidazolate framework (ZIF)-8 on polyethyleneimine (PEI)/ bacterial cellulose (BC) nanofilms.The addition of snowflake-like ZIF-8 structure on the PEI/BC sensitive film significantly improves the hydrophobicity of the SAW sensor and increases its sensitivity to formaldehyde gas. It also significantly increases surface roughness of the sensitive film. The hydrophobic nature of ZIF-8 prevents water molecules from entering into the internal pores of the BC film, thereby avoiding a significant mass loading caused by humidity when the sensor is used to detect low-concentration formaldehyde gas. The Zn 2+ sites at the surface of ZIF-8 improves the sensor's response to formaldehyde gas through enhanced physical adsorptions of gas molecules. Experimental results show that the ZIF-8@PEI/BC SAW sensor has a response (e.g., frequency shift) of 40.3 kHz to 10 ppm formaldehyde gas at 25℃ and 30% relative humidity (RH). When the relative humidity is increased from 30% to 93%, the response of the sensor only varies ~5%, and the change in response is negligible at medium humidity levels (~50 to 60% RH).

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Bacterial cellulose coated ST-cut quartz surface acoustic wave humidity sensor with high sensitivity, fast response and recovery

Cited by 19 publications

References 38 publications

Recent Advances in Functional Bacterial Cellulose for Wearable Physical Sensing Applications

Recent Advances in Functional Bacterial Cellulose for Wearable Physical Sensing Applications

Dual resonance modes in two-port SAW resonator sensors: an analysis through scattering matrix approach

Hydrophobic metal organic framework for enhancing performance of acoustic wave formaldehyde sensor based on polyethyleneimine and bacterial cellulose nanofilms

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