{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,19]],"date-time":"2026-06-19T12:04:09Z","timestamp":1781870649919,"version":"3.54.5"},"reference-count":58,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2024,10,11]],"date-time":"2024-10-11T00:00:00Z","timestamp":1728604800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"State Program LIFETECH","award":["020404"],"award-info":[{"award-number":["020404"]}]},{"name":"the Ministry of Education and Research of the Republic of Moldova","award":["020404"],"award-info":[{"award-number":["020404"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Acetone detection is of significant importance in various industries, from cosmetics to pharmaceuticals, bioengineering, and paints. Sensor manufacturing involves the use of different semiconductor materials as well as different metals for doping and functionalization, allowing them to achieve advanced or unique properties in different sensor applications. In the healthcare field, these sensors play a crucial role in the non-invasive diagnosis of various diseases, offering a potential way to monitor metabolic conditions by analyzing respiration. This article presents the synthesis method, using chemical solutions and rapid thermal annealing technology, to obtain Al-functionalized and Ni-doped copper oxide (Al\/CuO:Ni) nanostructured thin films for biosensors. The nanocrystalline thin films are subjected to a thorough characterization, with examination of the morphological properties by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) analysis. The results reveal notable changes in the surface morphology and structure following different treatments, providing insight into the mechanism of function and selectivity of these nanostructures for gases and volatile compounds. The study highlights the high selectivity of developed Al\/CuO:Ni nanostructures towards acetone vapors at different concentrations from 1 ppm to 1000 ppm. Gas sensitivity is evaluated over a range of operating temperatures, indicating optimum performance at 300 \u00b0C and 350 \u00b0C with the maximum sensor signal (S) response obtained being 45% and 50%, respectively, to 50 ppm gas concentration. This work shows the high potential of developed technology for obtaining Al\/CuO:Ni nanostructured thin films as next-generation materials for improving the sensitivity and selectivity of acetone sensors for practical applications as breath detectors in biomedical diagnostics, in particular for diabetes monitoring. It also emphasizes the importance of these sensors in ensuring industrial safety by preventing adverse health and environmental effects of exposure to acetone.<\/jats:p>","DOI":"10.3390\/s24206550","type":"journal-article","created":{"date-parts":[[2024,10,11]],"date-time":"2024-10-11T08:54:27Z","timestamp":1728636867000},"page":"6550","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Acetone Sensors Based on Al-Coated and Ni-Doped Copper Oxide Nanocrystalline Thin Films"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5603-7510","authenticated-orcid":false,"given":"Dinu","family":"Litra","sequence":"first","affiliation":[{"name":"Center for Nanotechnology and Nanosensors, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"},{"name":"Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2163-8735","authenticated-orcid":false,"given":"Maxim","family":"Chiriac","sequence":"additional","affiliation":[{"name":"Center for Nanotechnology and Nanosensors, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"},{"name":"Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5046-8611","authenticated-orcid":false,"given":"Nicolai","family":"Ababii","sequence":"additional","affiliation":[{"name":"Center for Nanotechnology and Nanosensors, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"},{"name":"Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleg","family":"Lupan","sequence":"additional","affiliation":[{"name":"Center for Nanotechnology and Nanosensors, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"},{"name":"Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova"},{"name":"Department of Physics, University of Central Florida, Orlando, FL 32816-2385, USA"},{"name":"Functional Nanomaterials, Department for Materials Science, Kiel University, Kaiserstr. 2, D-24143 Kiel, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,10,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"132102","DOI":"10.1016\/j.snb.2022.132102","article-title":"Development of MoO3-CdO Nanoparticles Based Sensing Device for the Detection of Harmful Acetone Levels in Our Skin and Body via Nail Paint Remover","volume":"368","author":"Gupta","year":"2022","journal-title":"Sens. Actuators B Chem."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4744","DOI":"10.3390\/s110504744","article-title":"Electronic Noses and Tongues: Applications for the Food and Pharmaceutical Industries","volume":"11","author":"Baldwin","year":"2011","journal-title":"Sensors"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Mishra, R.K., Choi, G.-J., Choi, H.-J., and Gwag, J.-S. (2021). ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor\/Outdoor Environment. Micromachines, 12.","DOI":"10.3390\/mi12060598"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"13780","DOI":"10.1016\/j.ceramint.2015.08.060","article-title":"Synthesis of In2O3 Hollow Nanofibers and Their Application in Highly Sensitive Detection of Acetone","volume":"41","author":"Liang","year":"2015","journal-title":"Ceram. Int."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.jhazmat.2014.05.044","article-title":"Rapid and Selective Detection of Acetone Using Hierarchical ZnO Gas Sensor for Hazardous Odor Markers Application","volume":"276","author":"Jia","year":"2014","journal-title":"J. Hazard. Mater."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"250","DOI":"10.1016\/j.snb.2014.07.074","article-title":"Nanoscale Metal Oxide-Based Heterojunctions for Gas Sensing: A Review","volume":"204","author":"Miller","year":"2014","journal-title":"Sens. Actuators B Chem."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"104131","DOI":"10.1016\/j.surfin.2024.104131","article-title":"Enhanced Hydrogen Gas Sensing Characteristics of CuO\/ZnO Heterojunction for Thickness-Dependence and Its Application","volume":"46","author":"Yang","year":"2024","journal-title":"Surf. Interfaces"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"124286","DOI":"10.1016\/j.matchemphys.2021.124286","article-title":"Understanding the Ethanol and Acetone Sensing Behaviour of CuO Thin Films through Elements of Gas Diffusion Theory","volume":"262","author":"Bhowmick","year":"2021","journal-title":"Mater. Chem. Phys."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"504","DOI":"10.1016\/j.cej.2018.01.072","article-title":"Prussian Blue Analogue Derived Porous NiFe2O4 Nanocubes for Low-Concentration Acetone Sensing at Low Working Temperature","volume":"338","author":"Wang","year":"2018","journal-title":"Chem. Eng. J."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"923","DOI":"10.1016\/j.snb.2016.06.144","article-title":"Highly Sensitive Acetone Gas Sensor Based on Ultrafine \u03b1-Fe2O3 Nanoparticles","volume":"238","author":"Liang","year":"2017","journal-title":"Sens. Actuators B Chem."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"426","DOI":"10.1016\/j.snb.2007.04.048","article-title":"Acetone and Ethanol Solid-State Gas Sensors Based on TiO2 Nanoparticles Thin Film Deposited by Matrix Assisted Pulsed Laser Evaporation","volume":"127","author":"Rella","year":"2007","journal-title":"Sens. Actuators B Chem."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"655","DOI":"10.1016\/j.jallcom.2016.11.298","article-title":"Acetone Gas Detection Using TiO2 Nanoparticles Functionalized In2O3 Nanowires for Diagnosis of Diabetes","volume":"696","author":"Park","year":"2017","journal-title":"J. Alloys Compd."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1016\/j.snb.2017.10.073","article-title":"Iron and Carbon Codoped WO3 with Hierarchical Walnut-like Microstructure for Highly Sensitive and Selective Acetone Sensor","volume":"256","author":"Shen","year":"2018","journal-title":"Sens. Actuators B Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"294","DOI":"10.1016\/j.materresbull.2018.02.006","article-title":"Synthesis and Gas Sensing Properties of NiO\/SnO2 Hierarchical Structures toward Ppb-Level Acetone Detection","volume":"102","author":"Hu","year":"2018","journal-title":"Mater. Res. Bull."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"104420","DOI":"10.1016\/j.nanoen.2019.104420","article-title":"Facile Fabrication of Semiconducting Oxide Nanostructures by Direct Ink Writing of Readily Available Metal Microparticles and Their Application as Low Power Acetone Gas Sensors","volume":"70","author":"Siebert","year":"2020","journal-title":"Nano Energy"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1016\/j.snb.2015.10.018","article-title":"Ethanol Gas and Humidity Sensors of CuO\/Cu2O Composite Nanowires Based on a Cu through-Silicon via Approach","volume":"224","author":"Hsu","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_17","unstructured":"Tiginyanu, I., Sontea, V., and Railean, S. (2020). Acetone Sensing Properties of Nanostructured Copper Oxide Films on Glass Substrate. 4th International Conference on Nanotechnologies and Biomedical Engineering, Chisinau, Republic of Moldova, 18\u201321 September 2019, Springer International Publishing."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"112804","DOI":"10.1016\/j.sna.2021.112804","article-title":"Heterostructure-Based Devices with Enhanced Humidity Stability for H2 Gas Sensing Applications in Breath Tests and Portable Batteries","volume":"329","author":"Lupan","year":"2021","journal-title":"Sens. Actuators A Phys."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"367","DOI":"10.1016\/j.snb.2017.05.167","article-title":"Three-Dimensional Ordered ZnO\u2013Fe3O4 Inverse Opal Gas Sensor toward Trace Concentration Acetone Detection","volume":"252","author":"Zhang","year":"2017","journal-title":"Sens. Actuators B Chem."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"106241","DOI":"10.1016\/j.nanoen.2021.106241","article-title":"Tailoring the Selectivity of Ultralow-Power Heterojunction Gas Sensors by Noble Metal Nanoparticle Functionalization","volume":"88","author":"Lupan","year":"2021","journal-title":"Nano Energy"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"7157","DOI":"10.3390\/s120607157","article-title":"A Sub-Ppm Acetone Gas Sensor for Diabetes Detection Using 10 Nm Thick Ultrathin InN FETs","volume":"12","author":"Kao","year":"2012","journal-title":"Sensors"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Rydosz, A. (2018). Sensors for Enhanced Detection of Acetone as a Potential Tool for Noninvasive Diabetes Monitoring. Sensors, 18.","DOI":"10.3390\/s18072298"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1016\/j.aca.2012.06.002","article-title":"Breath Acetone Monitoring by Portable Si:WO3 Gas Sensors","volume":"738","author":"Righettoni","year":"2012","journal-title":"Anal. Chim. Acta"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Cappon, G., Acciaroli, G., Vettoretti, M., Facchinetti, A., and Sparacino, G. (2017). Wearable Continuous Glucose Monitoring Sensors: A Revolution in Diabetes Treatment. Electronics, 6.","DOI":"10.3390\/electronics6030065"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"605","DOI":"10.1007\/s40846-016-0164-6","article-title":"Significance of Exhaled Breath Test in Clinical Diagnosis: A Special Focus on the Detection of Diabetes Mellitus","volume":"36","author":"Das","year":"2016","journal-title":"J. Med. Biol. Eng."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"46004","DOI":"10.1088\/1752-7155\/3\/4\/046004","article-title":"Breath Acetone Concentration Decreases with Blood Glucose Concentration in Type I Diabetes Mellitus Patients during Hypoglycaemic Clamps","volume":"3","author":"Turner","year":"2009","journal-title":"J. Breath Res."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1038\/s41572-020-0165-1","article-title":"Diabetic Ketoacidosis","volume":"6","author":"Dhatariya","year":"2020","journal-title":"Nat. Rev. Dis. Prim."},{"key":"ref_28","unstructured":"Ni, J. (2024, October 08). WHO Highlights High Cost of Physical Inactivity in First-Ever Global Report. Available online: https:\/\/www.who.int\/news\/item\/19-10-2022-who-highlights-high-cost-of-physical-inactivity-in-first-ever-global-report."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"447","DOI":"10.1136\/bmj.328.7437.447","article-title":"How Strong Is the Evidence of a Link between Environmental Chemicals and Adverse Effects on Human Reproductive Health?","volume":"328","author":"Sharpe","year":"2004","journal-title":"BMJ"},{"key":"ref_30","first-page":"e18466","article-title":"Acetone Ingestion Resulting in Cardiac Arrest and Death","volume":"13","author":"Umeh","year":"2021","journal-title":"Cureus"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1007\/s10973-011-1605-7","article-title":"Fire and Explosion Hazard Evaluation for the Acetone Aqueous Solutions","volume":"106","author":"Chang","year":"2011","journal-title":"J. Therm. Anal. Calorim."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Johanson, G. (2012). Acetone. Patty\u2019s Toxicology, Wiley.","DOI":"10.1002\/0471435139.tox074.pub2"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1016\/j.jchas.2014.03.006","article-title":"Acetone","volume":"21","author":"Luttrell","year":"2014","journal-title":"J. Chem. Health Saf."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"525","DOI":"10.1007\/s10973-008-9460-x","article-title":"Elevated Pressure and Temperature Effects on Flammability Hazard Assessment for Acetone and Water Solutions","volume":"95","author":"Chang","year":"2009","journal-title":"J. Therm. Anal. Calorim."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"127667","DOI":"10.1016\/j.matchemphys.2023.127667","article-title":"Effect of Ni Doping on Structural, Optical and Gas Sensing Properties of ZnO Films for the Development of Acetone Sensor Devices","volume":"301","author":"Lokhande","year":"2023","journal-title":"Mater. Chem. Phys."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"45","DOI":"10.52326\/jes.utm.2023.30(4).04","article-title":"Annealing Effect on UV Detection Properties of ZnO:Al structures","volume":"30","author":"Rajat","year":"2024","journal-title":"J. Eng. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"434","DOI":"10.1016\/j.snb.2015.10.042","article-title":"Enhanced Ethanol Vapour Sensing Performances of Copper Oxide Nanocrystals with Mixed Phases","volume":"224","author":"Lupan","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"107070","DOI":"10.1016\/j.mssp.2022.107070","article-title":"Curing Defects in Plasma-Enhanced Atomic Layer Deposition of Al2O3 by Six Methods","volume":"152","author":"An","year":"2022","journal-title":"Mater. Sci. Semicond. Process."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"649","DOI":"10.1016\/j.ceramint.2008.01.028","article-title":"Ethanol Sensing Properties of CuO Nanowires Prepared by an Oxidation Reaction","volume":"35","author":"Raksa","year":"2009","journal-title":"Ceram. Int."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Zhang, N., Li, H., Xu, Z., Yuan, R., Xu, Y., and Cui, Y. (2020). Enhanced Acetone Sensing Property of a Sacrificial Template Based on Cubic-Like MOF-5 Doped by Ni Nanoparticles. Nanomaterials, 10.","DOI":"10.3390\/nano10020386"},{"key":"ref_41","first-page":"884","article-title":"P2NG.21-Ni-Doped ZnO Sensors for Highly Selective Detection of Acetone","volume":"2018","author":"Alirezaei","year":"2018","journal-title":"Proc. IMCS"},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Kutukov, P., Rumyantseva, M., Krivetskiy, V., Filatova, D., Batuk, M., Hadermann, J., Khmelevsky, N., Aksenenko, A., and Gaskov, A. (2018). Influence of Mono- and Bimetallic PtOx, PdOx, PtPdOx Clusters on CO Sensing by SnO2 Based Gas Sensors. Nanomaterials, 8.","DOI":"10.3390\/nano8110917"},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Sontea, V., Tiginyanu, I., and Railean, S. (2024). Morphological and Sensing Properties of the ZnO-Zn2SnO4 Ternary Phase Nanorod Arrays. 6th International Conference on Nanotechnologies and Biomedical Engineering, Chisinau, Republic of Moldova, 20\u201323 September 2023, Springer Nature.","DOI":"10.1007\/978-3-031-42775-6"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"175385","DOI":"10.1016\/j.jallcom.2024.175385","article-title":"Ultra-Selective Hydrogen Sensors Based on CuO-ZnO Hetero-Structures Grown by Surface Conversion","volume":"1002","author":"Chakraborty","year":"2024","journal-title":"J. Alloys Compd."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"42248","DOI":"10.1021\/acsami.0c09879","article-title":"Single CuO\/Cu2O\/Cu Microwire Covered by a Nanowire Network as a Gas Sensor for the Detection of Battery Hazards","volume":"12","author":"Lupan","year":"2020","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1107\/S0567740870001838","article-title":"A Refinement of the Crystal Structure of Copper(II) Oxide with a Discussion of Some Exceptional e.s.d.\u2019s","volume":"26","author":"Norrby","year":"1970","journal-title":"Acta Crystallogr. Sect. B Struct. Crystallogr. Cryst. Chem."},{"key":"ref_47","unstructured":"Bhattacharya, P., Fornari, R., and Kamimura, H. (2011). 3.11\u2014Nanostructures of Metal Oxides. Comprehensive Semiconductor Science and Technology, Elsevier."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"424","DOI":"10.1186\/1556-276X-9-424","article-title":"Solution Growth of NiO Nanosheets Supported on Ni Foam as High-Performance Electrodes for Supercapacitors","volume":"9","author":"Yan","year":"2014","journal-title":"Nanoscale Res. Lett."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"235603","DOI":"10.1088\/1361-6528\/ab0837","article-title":"The impact of O2\/Ar ratio on morphology and functional properties in reactive sputtering of metal oxide thin films","volume":"30","author":"Vahl","year":"2019","journal-title":"Nanotechnology"},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Sontea, V., and Tiginyanu, I. (2016). Effect of Dopant on Selectivity of CuO Nanostructured Films\u2014Based Sensors. 3rd International Conference on Nanotechnologies and Biomedical Engineering, Chisinau, Republic of Moldova, 23\u201326 September 2015, Springer.","DOI":"10.1007\/978-981-287-736-9"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"4383","DOI":"10.1007\/s10853-005-0738-0","article-title":"Zinc Oxide Thin Film Gas Sensor for Detection of Acetone","volume":"40","author":"Sahay","year":"2005","journal-title":"J. Mater. Sci."},{"key":"ref_52","doi-asserted-by":"crossref","unstructured":"Schr\u00f6der, S., Ababii, N., Br\u00eenz\u0103, M., Magariu, N., Zimoch, L., Bodduluri, M.T., Strunskus, T., Adelung, R., Faupel, F., and Lupan, O. (2023). Tuning the Selectivity of Metal Oxide Gas Sensors with Vapor Phase Deposited Ultrathin Polymer Thin Films. Polymers, 15.","DOI":"10.3390\/polym15030524"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"137693","DOI":"10.1016\/j.tsf.2019.137693","article-title":"Effect of Pd-Decoration on the Sensing Properties of ZnO Nanostructures","volume":"693","author":"Dilova","year":"2020","journal-title":"Thin Solid Films"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"131531","DOI":"10.1016\/j.snb.2022.131531","article-title":"Current State of Knowledge on the Metal Oxide Based Gas Sensing Mechanism","volume":"358","author":"Staerz","year":"2022","journal-title":"Sens. Actuators B Chem."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"25508","DOI":"10.1021\/acsami.9b04385","article-title":"3D-Printed Chemiresistive Sensor Array on Nanowire CuO\/Cu2O\/Cu Heterojunction Nets","volume":"11","author":"Siebert","year":"2019","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1016\/j.mee.2016.07.008","article-title":"Influence of CuO Nanostructures Morphology on Hydrogen Gas Sensing Performances","volume":"164","author":"Lupan","year":"2016","journal-title":"Microelectron. Eng."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1023\/A:1023436725457","article-title":"Oxide Semiconductor Gas Sensors","volume":"7","author":"Yamazoe","year":"2003","journal-title":"Catal. Surv. Asia"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"7681","DOI":"10.1007\/s10854-019-01083-9","article-title":"Acetone Sensor Based on Ni Doped ZnO Nanostructues: Growth and Sensing Capability","volume":"30","author":"Hartiti","year":"2019","journal-title":"J. Mater. Sci. Mater. Electron."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/20\/6550\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T16:11:11Z","timestamp":1760112671000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/20\/6550"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,10,11]]},"references-count":58,"journal-issue":{"issue":"20","published-online":{"date-parts":[[2024,10]]}},"alternative-id":["s24206550"],"URL":"https:\/\/doi.org\/10.3390\/s24206550","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,10,11]]}}}