UV-Enhanced Humidity Sensing of Chitosan–SnO2 Hybrid Nanowires

Şişman, Orhan; Kaur, Navpreet; Sberveglieri, Giorgio; Núñez-Carmona, Estefanía; Sberveglieri, Veronica; Comini, Elisabetta

doi:10.3390/nano10020329

Cited by 16 publications

(2 citation statements)

References 35 publications

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“…On the other side, chitosan has been exploited in many electronic and optoelectronic applications, such as photodiodes [12], thermal sensors [13], Schottky barrier modifier [13,14], resistive random-access memory (RRAM) [15,16], light-emitting diodes [17], humidity sensors [18,19], modulators [20], and optical waveguides, where the lower-molecular-weight chitosan achieved lower loss than that of the higher molecular weight [21]. Additionally, chitosan possessed unique photochromic features [22] and corrosion inhibition [23].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

et al. 2023

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The necessity for reliable and efficient multifunctional optical and optoelectronic devices is always calling for the exploration of new fertile materials for this purpose. This study leverages the exploitation of dyed environmentally friendly biopolymeric thin films as a potential optical absorber in the development of multifunctional opto-(electronic) and solar cell applications. Uniform, stable thin films of dyed chitosan were prepared using a spin-coating approach. The molecular interactivity between the chitosan matrix and all the additive organic dyes was evaluated using FTIR measurements. The color variations were assessed using chromaticity (CIE) measurements. The optical properties of films were inspected using the measured UV-vis-NIR transmission and reflection spectra. The values of the energy gap and Urbach energy as well as the electronic parameters and nonlinear optical parameters of films were estimated. The prepared films were exploited for laser shielding as an attenuated laser cut-off material. In addition, the performance of the prepared thin films as an absorbing organic layer with silicon in an organic/inorganic heterojunction architecture for photosensing and solar energy conversion applicability was studied. The current-voltage relation under dark and illumination declared the suitability of this architecture in terms of responsivity and specific detectivity values for efficient light sensing applications. The suitability of such films for solar cell fabrications is due to some dyed films achieving open-circuit voltage and short-circuit current values, where Saf-dyed films achieved the highest Voc (302 mV) while MV-dyed films achieved the highest Jsc (0.005 mA/cm2). Finally, based on all the obtained characterization results, the engineered natural cost-effective dyed films are considered potential active materials for a wide range of optical and optoelectronic applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

et al. 2023

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“…Sisman et al [ 27 ] fabricated a humidity sensor by using chitosan-functionalized tin oxide nanowires (SnO 2 NWs) as the active layer, however, this functional layer was not completely biocompatible due to the addition of SnO 2 NWs as the biopolymer of chitosan alone was not able to efficiently sense humidity. Natali et al [ 28 ] studied the humidity response of a keratin-based sensor by fabricating a flexible microelectrode array but it showed low sensitivity and unsatisfactory stability.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Wide Range Humidity Response of Biocompatible Egg White Thin Film

Rehman

Saqib

et al. 2021

Nanomaterials

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Biopolymers are a solution to solve the increasing problems caused by the advances and revolution in the electronic industry owing to the use of hazardous chemicals. In this work, we have used egg white (EW) as the low-cost functional layer of a biocompatible humidity sensor and deposited it on gold (Au) interdigitated electrodes (IDEs) patterned through the state-of-the-art fabrication technology of thermal vacuum evaporation. The presence of hydrophilic proteins inside the thin film of EW makes it an attractive candidate for sensing humidity. Usually, the dependence of the percentage of relative humidity (%RH) on the reliability of measurement setup is overlooked for impedimetric humidity sensors but we have used a modified experimental setup to enhance the uniformity of the obtained results. The characteristics of our device include almost linear response with a quick response time (1.2 s) and fast recovery time (1.7 s). High sensitivity of 50 kΩ/%RH was achieved in the desirable detection range of 10–85%RH. The device size was intentionally kept small for its potential integration in a marketable chip. Results for the response of our fabricated sensor for dry and wet fingertips, along with determining the rate of breathing through the mouth, are part of this study, making it a potential device for health monitoring.

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Chitosan-SnO2 Composite film-based self-powered galvanic cell for detecting ammonia gas at room temperature

Balyan,

Ahmadipour,

Ahmad

et al. 2024

Appl. Phys. A

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UV-Enhanced Humidity Sensing of Chitosan–SnO2 Hybrid Nanowires

Cited by 16 publications

References 35 publications

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

Highly Efficient and Wide Range Humidity Response of Biocompatible Egg White Thin Film

Chitosan-SnO2 Composite film-based self-powered galvanic cell for detecting ammonia gas at room temperature

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