Prospects of spray pyrolysis technique for gas sensor applications – A comprehensive review

Sriram, Srinivasa Rao; Parne, Saidi Reddy; Nagaraju, P.; Edla, Damodar Reddy

doi:10.1016/j.jaap.2022.105527

Cited by 34 publications

(19 citation statements)

References 195 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It also possesses a high excitation binding energy of 60 meV at room temperature. These unique properties make ZnO suitable for sensor devices. , Various synthesis techniques are involved in preparing ZnO nanostructures, such as chemical vapor coating, sol–gel method, electrochemical deposition, sputtering, hydrothermal, and spray pyrolysis technique . The surface morphology, crystal type, crystal size, particle shape, particle size distribution, degree of agglomeration, and porosity are explored as properties of nanostructures that make them appropriate for gas-sensing applications.…”

Section: Introductionmentioning

confidence: 99%

Investigattions on ZnO Thin Films Modified with Urea: An Approach as Ammonia Sensor

Vaddadi

Parne

Nagaraju³

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

Pure and urea-modified zinc oxide thin films are prepared using the spray pyrolysis technique on microscopic glass substrates. We have added different urea concentrations as a modifier to the zinc acetate precursor for obtaining urea-modified ZnO thin films and investigated the effect of the urea concentration on the structural, morphological, optical, and gas-sensing properties. The gas-sensing characterization of pure and urea-modified ZnO thin films is tested in the static liquid distribution technique with 25 ppm of ammonia gas at an operating temperature of 27 °C. The prepared film with a concentration of 2 wt % of urea has shown the best sensing properties toward ammonia vapors due to more active sites for the reaction between chemiabsorbed oxygen and the target vapors.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigattions on ZnO Thin Films Modified with Urea: An Approach as Ammonia Sensor

Vaddadi

Parne

Nagaraju³

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the recent COVID‐19 pandemic around the world, there is a surge in the usage of optoelectronic gadgets with displays in particular, to conduct online meetings and programs. The necessity of electronic devices like personal computers, televisions, mobile phones, solar cells, [ 1 ] gas sensors, [ 2 ] etc. has increased drastically.…”

Section: Introductionmentioning

confidence: 99%

Anionic Fluorine and Cationic Niobium Codoped Tin Oxide Thin Films as Transparent Conducting Electrodes for Optoelectronic Applications

Muniramaiah

Reddy

Santhosh

et al. 2023

Physica Status Solidi (a)

View full text Add to dashboard Cite

Exploration of alternatives for supplementing indium tin oxide electrode is currently trending due to scarcity of indium, leading to a steep increase in the cost of related optoelectronic components. Codoping of niobium (Nb) and fluorine (F) into SnO2 lattice as cationic and anionic dopants, respectively, is explored by spray deposition technique. A fixed 10 wt% F and varying Nb concentration from 0 to 5 wt% is incorporated into the SnO2 lattice. X‐ray diffraction reveals substitution of Nb and F into the SnO2 lattice without altering the structure. Optical transmittance is found to increase with Nb content up to 4% of Nb (77.59%), and it decreases thereafter. Scanning electron microscope and optical profiler imply a relatively smooth surface with sharp‐tipped particles which vary with Nb concentration. Sheet resistance decreases up to 3 wt% of Nb doping and increases thereafter. Contact angle measurement indicates that upon doping with Nb, the films turn hydrophilic. Among the deposited films, 4 wt% of Nb‐doped film shows the highest figure of merit of 5.01 × 10−3 Ω−1. The surface work function of the 4 wt% Nb‐doped SnO2 film is 4,687.85 meV. The optimal films are tested as electrodes in dye‐sensitized solar cells and are discussed in detail.

show abstract

“…Nanostructured metals refer to the materials in which at least one dimension of microstructural unit (such as grain size or lamellar spacing) is on a nanometer-scale (1–100 nm) and that have a variety of morphologies, such as nanorods, nanowires, nanospheres, etc. [ 4 , 5 ]. Due to the unique nano-level grains and high-density grain boundaries, nanostructured metals thus exhibit many physical and chemical properties that are completely different from those of traditional coarse-grained metals [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…[ 4 , 5 ]. Due to the unique nano-level grains and high-density grain boundaries, nanostructured metals thus exhibit many physical and chemical properties that are completely different from those of traditional coarse-grained metals [ 5 ]. In addition, their strength, hardness, wear resistance, and fatigue performance have been greatly improved compared with the corresponding coarse-grained counterparts [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Metals with an Excellent Synergy of Strength and Ductility: A Review

Chen

2022

Materials

View full text Add to dashboard Cite

Nanocrystalline metals developed based on fine grain strengthening always have an excellent strength, but are accompanied by a drop in ductility. In the past 20 years, substantial efforts have been dedicated to design new microstructures and develop the corresponding processing technologies in order to solve this problem. In this article, the novel nanostructures designed for simultaneously achieving high strength and high ductility developed in recent years, including bimodal grain size distribution nanostructure, nanotwinned structure, hierarchical nanotwinned structure, gradient nanostructure, and supra-nano-dual-phase nanostructure, are reviewed. Based on a comprehensive understanding of the simultaneously strengthening and toughening mechanisms, the microstructures and corresponding processing techniques are mainly discussed, and the related prospects that may be emphasized in the future are proposed.

show abstract

Prospects of spray pyrolysis technique for gas sensor applications – A comprehensive review

Cited by 34 publications

References 195 publications

Investigattions on ZnO Thin Films Modified with Urea: An Approach as Ammonia Sensor

Investigattions on ZnO Thin Films Modified with Urea: An Approach as Ammonia Sensor

Anionic Fluorine and Cationic Niobium Codoped Tin Oxide Thin Films as Transparent Conducting Electrodes for Optoelectronic Applications

Nanostructured Metals with an Excellent Synergy of Strength and Ductility: A Review

Contact Info

Product

Resources

About