High-Tech and Nature-Made Nanocomposites and Their Applications in the Field of Sensors and Biosensors for Gas Detection

Abstract

Gas sensors have been object of increasing attention by the scientific community in recent years. For the development of the sensing element, two major trends seem to have appeared. On one hand, the possibility of creating complex structures at the nanoscale level has given rise to ever more sensitive sensors based on metal oxides and metal–polymer combinations. On the other hand, gas biosensors have started to be developed, thanks to their intrinsic ability to be selective for the target analyte. In this review, we analyze the recent progress in both areas and underline their strength, current problems, and future perspectives.

Early-stage oral cancer diagnosis by artificial intelligence-based SERS using Ag NWs@ZIF core–shell nanochains

“…At the same time, EarlyStopping (5 steps) and ModelCheckpoint methods are used to obtain the optimal model. 35,36…”

Preparation of ternary polyaniline@CuO−zeolite composite, discussion of characteristics, properties and their applications in supercapacitors and cationic dye adsorption

“…9 The synthesis of conducting hybrid material based on inorganic materials or metal−polymer composites at the nanosized level has generated more sensitive applications due to the synergetic properties of the two combined materials. 10 One of the most significant types of CPs is polyaniline (PANI), which has interesting properties. Among various CPs, PANI is more significant due to its reversible doping/dedoping nature, direct bandgap energy of around 3.5 eV, 11 ease of synthesis, 12 excellent electrical conductivity and environmental stability.…”

“…From a devices point of view, CPs have many applications including sensors, 2 microwave‐ and radar‐absorbing materials, 3 rechargeable batteries, 4 thin film transistors, 5 electronic and bio‐electronic components, 6 light‐emitting diodes, 7 solar cells 8 and photodetectors 9 . The synthesis of conducting hybrid material based on inorganic materials or metal−polymer composites at the nanosized level has generated more sensitive applications due to the synergetic properties of the two combined materials 10 . One of the most significant types of CPs is polyaniline (PANI), which has interesting properties.…”

High-Sensitivity Metal Oxide Sensors Duplex for On-the-Field Detection of Acetic Acid Arising from the Degradation of Cellulose Acetate-Based Cinematographic and Photographic Films

“…A metal oxide semiconductor (MOS) sensors duplex has been assembled, testing different commercially available resistive MOS sensors, optimizing the sensor choice in order to create a sensing duplex capable of selectively quantifying acetic acid coming from cellulose acetate cinematographic films degradation. MOS-type sensors were chosen since numerous literature sources reports them as having low limit of detection, being quite selective for their target gas(es) and having extremely low energy and space requirements compared to other detection tools having similar analytical properties [15][16][17]. These last points are of particular interest for the case discussed here, since the developed sensing solution aims to be integrated directly into old cinematographic film boxes in order to provide real-time estimation of the undergoing degradation.…”