{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T02:35:24Z","timestamp":1776998124785,"version":"3.51.4"},"reference-count":70,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2024,11,22]],"date-time":"2024-11-22T00:00:00Z","timestamp":1732233600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\u2013Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia"},{"name":"PRR-Recovery and Resilience Plan"},{"name":"Next Generation EU Funds"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>This study investigates the structural, chemical, and morphological properties of CuO nanoparticles synthesized via a green synthesis route using Opuntia ficus-indica cladode extract, with a focus on the effects of stepwise versus direct calcination. Raman spectroscopy revealed the presence of CuO, Na2CO3, and Na2SO3, with the latter two being associated with elements inherited from the cactus extracts. XRD patterns confirmed the presence of crystalline CuO and Na2CO3 phases, with the low content of Na2SO3 inferred to be amorphous. Rietveld refinement estimated a CuO content of approximately 77% in the stepwise-calcined sample and 75% in the directly calcined sample, with lattice parameters closely aligning with reference values. SEM micrographs revealed a tendency for CuO nanoparticles to aggregate, likely due to high surface energy and interaction with the viscous plant extract used in the green synthesis. Crystallite size estimates, along with morphological observations, suggest that stepwise calcination enhances crystallinity and particle definition without altering the fundamental nanoparticle morphology. These findings highlight the influence of calcination method and natural extracts on the composition and morphology of green-synthesized CuO nanoparticles, offering insights into potential applications, namely in microelectronics, due to their promising dielectric properties.<\/jats:p>","DOI":"10.3390\/ma17235709","type":"journal-article","created":{"date-parts":[[2024,11,22]],"date-time":"2024-11-22T06:41:48Z","timestamp":1732257708000},"page":"5709","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Green Synthesis of CuO Nanoparticles\u2014Structural, Morphological, and Dielectric Characterization"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-7146-2531","authenticated-orcid":false,"given":"Joana","family":"Neiva","sequence":"first","affiliation":[{"name":"CEMMPRE, ARISE, Department of Mechanical Engineering, University of Coimbra, Rua Lu\u00eds Reis Santos, 3030-788 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3596-6588","authenticated-orcid":false,"given":"Zohra","family":"Benzarti","sequence":"additional","affiliation":[{"name":"CEMMPRE, ARISE, Department of Mechanical Engineering, University of Coimbra, Rua Lu\u00eds Reis Santos, 3030-788 Coimbra, Portugal"},{"name":"Laboratory of Multifunctional Materials and Applications (LaMMA), Department of Physics, Faculty of Sciences of Sfax, University of Sfax, Soukra Road km 3.5, B.P. 1171, Sfax 3000, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3643-4973","authenticated-orcid":false,"given":"Sandra","family":"Carvalho","sequence":"additional","affiliation":[{"name":"CEMMPRE, ARISE, Department of Mechanical Engineering, University of Coimbra, Rua Lu\u00eds Reis Santos, 3030-788 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2217-4584","authenticated-orcid":false,"given":"Susana","family":"Devesa","sequence":"additional","affiliation":[{"name":"CEMMPRE, ARISE, Department of Mechanical Engineering, University of Coimbra, Rua Lu\u00eds Reis Santos, 3030-788 Coimbra, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2024,11,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"482","DOI":"10.1134\/S0022476618020324","article-title":"Green Chemistry Approach for the Synthesis of Copper Oxide Nanoparticles Using Tragacanth Gel and Their Structural Characterization","volume":"59","author":"Ramazani","year":"2018","journal-title":"J. Struct. Chem."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"634","DOI":"10.1038\/nnano.2009.242","article-title":"Towards a Definition of Inorganic Nanoparticles from an Environmental, Health and Safety Perspective","volume":"4","author":"Auffan","year":"2009","journal-title":"Nat. Nanotechnol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1186\/1743-8977-3-11","article-title":"The Potential Risks of Nanomaterials: A Review Carried out for ECETOC","volume":"3","author":"Borm","year":"2006","journal-title":"Part. Fibre Toxicol."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Joudeh, N., and Linke, D. (2022). Nanoparticle Classification, Physicochemical Properties, Characterization, and Applications: A Comprehensive Review for Biologists. J. Nanobiotechnology, 20.","DOI":"10.1186\/s12951-022-01477-8"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Szczyglewska, P., Feliczak-Guzik, A., and Nowak, I. (2023). Nanotechnology\u2013General Aspects: A Chemical Reduction Approach to the Synthesis of Nanoparticles. Molecules, 28.","DOI":"10.3390\/molecules28134932"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"104623","DOI":"10.1016\/j.microc.2020.104623","article-title":"Nanoparticles: Synthesis, Characteristics, and Applications in Analytical and Other Sciences","volume":"154","author":"Sajid","year":"2020","journal-title":"Microchem. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1016\/j.apenergy.2017.01.074","article-title":"Advanced Nanomaterials in Oil and Gas Industry: Design, Application and Challenges","volume":"191","author":"Khalil","year":"2017","journal-title":"Appl. Energy"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"103739","DOI":"10.1016\/j.arabjc.2022.103739","article-title":"Green Synthesis of Copper Oxide Nanoparticles CuO NPs from Eucalyptus Globoulus Leaf Extract: Adsorption and Design of Experiments","volume":"15","author":"Alhalili","year":"2022","journal-title":"Arab. J. Chem."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1016\/j.matpr.2020.08.800","article-title":"Structural and Optical Properties of Sol\u2013Gel Derived CuO and Cu2O Nanoparticles","volume":"41","author":"Kumar","year":"2021","journal-title":"Mater. Today Proc."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1016\/j.jcis.2014.08.044","article-title":"Synthesis and Microwave Modification of CuO Nanoparticles: Crystallinity and Morphological Variations, Catalysis, and Gas Sensing","volume":"435","author":"Yang","year":"2014","journal-title":"J. Colloid Interface Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"607","DOI":"10.1007\/s42452-019-0592-3","article-title":"Metal Oxide Nanoparticles and Their Applications in Nanotechnology","volume":"1","author":"Chavali","year":"2019","journal-title":"SN Appl. Sci."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"10708","DOI":"10.1016\/j.ceramint.2017.05.006","article-title":"Structural and Dielectric Properties of CuO Nanoparticles","volume":"43","year":"2017","journal-title":"Ceram. Int."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"743","DOI":"10.1016\/j.ijleo.2017.12.029","article-title":"Effect of Precursors Medium on Structural, Optical and Dielectric Properties of CuO Nanostructures","volume":"156","author":"Chand","year":"2018","journal-title":"Optik"},{"key":"ref_14","first-page":"100443","article-title":"CuO Nanoparticles (CuO NPs) for Water Treatment: A Review of Recent Advances","volume":"15","author":"Ighalo","year":"2021","journal-title":"Environ. Nanotechnol. Monit. Manag."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1080\/17518253.2020.1802517","article-title":"Detail Review on Chemical, Physical and Green Synthesis, Classification, Characterizations and Applications of Nanoparticles","volume":"13","author":"Ijaz","year":"2020","journal-title":"Green Chem. Lett. Rev."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"908","DOI":"10.1016\/j.arabjc.2017.05.011","article-title":"Nanoparticles: Properties, Applications and Toxicities","volume":"12","author":"Khan","year":"2019","journal-title":"Arab. J. Chem."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Alsaiari, N.S., Alzahrani, F.M., Amari, A., Osman, H., Harharah, H.N., Elboughdiri, N., and Tahoon, M.A. (2023). Plant and Microbial Approaches as Green Methods for the Synthesis of Nanomaterials: Synthesis, Applications, and Future Perspectives. Molecules, 28.","DOI":"10.3390\/molecules28010463"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Alhalili, Z. (2023). Metal Oxides Nanoparticles: General Structural Description, Chemical, Physical, and Biological Synthesis Methods, Role in Pesticides and Heavy Metal Removal through Wastewater Treatment. Molecules, 28.","DOI":"10.3390\/molecules28073086"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1155\/2021\/5102014","article-title":"Nanomaterial by Sol-Gel Method: Synthesis and Application","volume":"2021","author":"Bokov","year":"2021","journal-title":"Adv. Mater. Sci. Eng."},{"key":"ref_20","first-page":"1","article-title":"Biosynthesis of Nanoparticles and Their Roles in Numerous Areas","volume":"94","author":"Prabakaran","year":"2021","journal-title":"Compr. Anal. Chem."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"18468","DOI":"10.1016\/j.ijhydene.2022.03.035","article-title":"An Overview of Nanomaterials in Fuel Cells: Synthesis Method and Application","volume":"47","author":"Raduwan","year":"2022","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Deena Raj, K.M., Sujatha, S., and Chanthini, K.M.-P. (2024). Green Synthesis of CuO Nanoparticle Using Cyperus Rotundus and Evaluation of Their Anticancer Potentials against Lung Cancer Cells Invitro. Biocatal. Agric. Biotechnol., 57.","DOI":"10.1016\/j.bcab.2024.103119"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1016\/j.jssc.2018.04.010","article-title":"Eco-Friendly Synthesis of Cuprous Oxide (Cu2O) Nanoparticles and Improvement of Their Solar Photocatalytic Activities","volume":"263","author":"Kerour","year":"2018","journal-title":"J. Solid State Chem."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Govindasamy, R., Govindarasu, M., Alharthi, S.S., Mani, P., Bernaurdshaw, N., Gomathi, T., Ansari, M.A., Alomary, M.N., Atwah, B., and Malik, M.S. (2022). Sustainable Green Synthesis of Yttrium Oxide (Y2O3) Nanoparticles Using Lantana Camara Leaf Extracts: Physicochemical Characterization, Photocatalytic Degradation, Antibacterial, and Anticancer Potency. Nanomaterials, 12.","DOI":"10.3390\/nano12142393"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/j.ultsonch.2017.09.006","article-title":"Ultrasound-Assisted Biosynthesis of CuO-NPs Using Brown Alga Cystoseira Trinodis: Characterization, Photocatalytic AOP, DPPH Scavenging and Antibacterial Investigations","volume":"41","author":"Gu","year":"2018","journal-title":"Ultrason. Sonochem."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/j.jhazmat.2017.12.070","article-title":"Biosynthesis of Copper Nanoparticles Using Shewanella Loihica PV-4 with Antibacterial Activity: Novel Approach and Mechanisms Investigation","volume":"347","author":"Lv","year":"2018","journal-title":"J. Hazard. Mater."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Cunha, F.A., Cunha, M.d.C.S.O., da Frota, S.M., Mallmann, E.J.J., Freire, T.M., Costa, L.S., Paula, A.J., Menezes, E.A., and Fechine, P.B.A. (2018). Biogenic Synthesis of Multifunctional Silver Nanoparticles from Rhodotorula Glutinis and Rhodotorula Mucilaginosa: Antifungal, Catalytic and Cytotoxicity Activities. World J. Microbiol. Biotechnol., 34.","DOI":"10.1007\/s11274-018-2514-8"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Jalal, M., Ansari, M.A., Alzohairy, M.A., Ali, S.G., Khan, H.M., Almatroudi, A., and Raees, K. (2018). Biosynthesis of Silver Nanoparticles from Oropharyngeal Candida Glabrata Isolates and Their Antimicrobial Activity against Clinical Strains of Bacteria and Fungi. Nanomaterials, 8.","DOI":"10.3390\/nano8080586"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1016\/j.virol.2013.11.002","article-title":"The Use of Tobacco Mosaic Virus and Cowpea Mosaic Virus for the Production of Novel Metal Nanomaterials","volume":"449","author":"Love","year":"2014","journal-title":"Virology"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"e04508","DOI":"10.1016\/j.heliyon.2020.e04508","article-title":"Green Synthesis of Copper Oxide Nanoparticles for Biomedical Application and Environmental Remediation","volume":"6","author":"Akintelu","year":"2020","journal-title":"Heliyon"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1016\/B978-0-12-813586-0.00003-1","article-title":"Biological Sources Used in Green Nanotechnology","volume":"28","author":"Nasrollahzadeh","year":"2019","journal-title":"Interface Sci. Technol."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Miu, B.A., and Dinischiotu, A. (2022). New Green Approaches in Nanoparticles Synthesis: An Overview. Molecules, 27.","DOI":"10.3390\/molecules27196472"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"100401","DOI":"10.1016\/j.hazadv.2024.100401","article-title":"Green Synthesis of Metal Oxide Nanoparticles, and Their Various Applications","volume":"13","author":"Aigbe","year":"2024","journal-title":"J. Hazard. Mater. Adv."},{"key":"ref_34","first-page":"1231","article-title":"Green Synthesis of Copper Oxide Nanoparticles by Pheonix Dactylifera L Leaves Extract","volume":"13","author":"Berra","year":"2018","journal-title":"Dig. J. Nanomater. Biostruct."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Bhatia, N., Kumari, A., Chauhan, N., Thakur, N., and Sharma, R. (2023). Duchsnea Indica Plant Extract Mediated Synthesis of Copper Oxide Nanomaterials for Antimicrobial Activity and Free-Radical Scavenging Assay. Biocatal. Agric. Biotechnol., 47.","DOI":"10.1016\/j.bcab.2022.102574"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Saif, S., Tahir, A., Asim, T., and Chen, Y. (2016). Plant Mediated Green Synthesis of CuO Nanoparticles: Comparison of Toxicity of Engineered and Plant Mediated CuO Nanoparticles towards Daphnia Magna. Nanomaterials, 6.","DOI":"10.3390\/nano6110205"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"554","DOI":"10.1007\/s12668-018-0508-5","article-title":"Green Synthesis of Copper Oxide Nanoparticles Using Ixiro Coccinea Plant Leaves and Its Characterization","volume":"8","author":"Vishveshvar","year":"2018","journal-title":"Bionanoscience"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"2037","DOI":"10.1080\/14786419.2017.1365073","article-title":"Opuntia ficus-indica (L.) Miller as a Source of Bioactivity Compounds for Health and Nutrition","volume":"32","author":"Aragona","year":"2018","journal-title":"Nat. Prod. Res."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Silva, M.A., Albuquerque, T.G., Pereira, P., Ramalho, R., Vicente, F., Oliveira, M.B.P.P., and Costa, H.S. (2021). Opuntia ficus-indica (L.) Mill.: A Multi-Benefit Potential to Be Exploited. Molecules, 26.","DOI":"10.3390\/molecules26040951"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"558","DOI":"10.21273\/JASHS.117.4.558","article-title":"Biomass and Fruit Production for the Prickly Pear Cactus, Opuntia ficus-indica","volume":"117","author":"Nobel","year":"1992","journal-title":"J. Am. Soc. Hortic. Sci."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"566","DOI":"10.1016\/j.matpr.2020.05.331","article-title":"Biosynthesis of Nickel Oxide (NiO) Nanoparticles from Cactus Plant Extract","volume":"36","author":"Gebretinsae","year":"2021","journal-title":"Mater. Today Proc."},{"key":"ref_42","first-page":"3309","article-title":"Chemical and Nutritional Content of Opuntia ficus-indica (L.)","volume":"12","author":"Chiteva","year":"2013","journal-title":"Afr. J. Biotechnol."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Shoukat, R., Cappai, M., Pia, G., and Pilia, L. (2023). An Updated Review: Opuntia Ficus Indica (OFI) Chemistry and Its Diverse Applications. Appl. Sci., 13.","DOI":"10.3390\/app13137724"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"188","DOI":"10.1080\/21870764.2023.2174243","article-title":"Impact of Two-Step Calcination on Microstructure, Phase, Electronic, and Dielectric Properties of KCa2Nb3O10 Bulk Layered Perovskite","volume":"11","author":"Kim","year":"2023","journal-title":"J. Asian Ceram. Soc."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Udensi, J., Loughman, J., Loskutova, E., and Byrne, H.J. (2022). Raman Spectroscopy of Carotenoid Compounds for Clinical Applications\u2014A Review. Molecules, 27.","DOI":"10.3390\/molecules27249017"},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Mehta, M., Naffa, R., Zhang, W., Schreurs, N.M., Waterland, M., Cooper, S., and Holmes, G. (2021). Validity and Reliability of Raman Spectroscopy for Carotenoid Assessment in Cattle Skin. Biochem. Biophys. Rep., 27.","DOI":"10.1016\/j.bbrep.2021.101036"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Udensi, J., Loskutova, E., Loughman, J., and Byrne, H.J. (2022). Quantitative Raman Analysis of Carotenoid Protein Complexes in Aqueous Solution. Molecules, 27.","DOI":"10.3390\/molecules27154724"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"e07292","DOI":"10.1016\/j.heliyon.2021.e07292","article-title":"Opuntia ficus-indica Is an Excellent Eco-Friendly Biosorbent for the Removal of Chromium in Leather Industry Effluents","volume":"7","author":"Lima","year":"2021","journal-title":"Heliyon"},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Lavado-Meza, C., Fernandez-Pezua, M.C., Gamarra-G\u00f3mez, F., Sacari-Sacari, E., Angeles-Suazo, J., and D\u00e1valos-Prado, J.Z. (2023). Single and Binary Removals of Pb(II) and Cd(II) with Chemically Modified Opuntia Ficus Indica Cladodes. Molecules, 28.","DOI":"10.3390\/molecules28114451"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"4007","DOI":"10.1002\/fsn3.2388","article-title":"Cladodes: Chemical and Structural Properties, Biological Activity, and Polyphenols Profile","volume":"9","year":"2021","journal-title":"Food Sci. Nutr."},{"key":"ref_51","first-page":"97","article-title":"The Raman Study of Certain Carbonates","volume":"2","author":"Buzgar","year":"2009","journal-title":"Geol. Tomul L"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"6","DOI":"10.1016\/j.mssp.2016.01.021","article-title":"Phase Transition of Cu2O to CuO Nanocrystals by Selective Laser Heating","volume":"46","author":"Tran","year":"2016","journal-title":"Mater. Sci. Semicond. Process."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"10232","DOI":"10.1021\/jp303096m","article-title":"Vibrational Properties of CuO and Cu 4 O 3 from First-Principles Calculations, and Raman and Infrared Spectroscopy","volume":"116","author":"Debbichi","year":"2012","journal-title":"J. Phys. Chem. C"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"6769","DOI":"10.1111\/jace.19306","article-title":"Room-temperature Structural, Magnetic, and Dielectric Characteristics of La-doped CuO Bulk Multiferroic","volume":"106","author":"Brajesh","year":"2023","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"516","DOI":"10.1006\/jssc.1999.8409","article-title":"Preparation and Characterization of CuO Nanocrystals","volume":"147","author":"Xu","year":"1999","journal-title":"J. Solid State Chem."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"102514","DOI":"10.1149\/1945-7111\/ab9e3e","article-title":"Insights into the Effects of Chloride Ions on Cyanide-Free Gold Electrodeposition","volume":"167","author":"Yang","year":"2020","journal-title":"J. Electrochem. Soc."},{"key":"ref_57","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. B"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1107\/S0108768103009017","article-title":"Sodium Carbonate Revisited","volume":"59","author":"Dusek","year":"2003","journal-title":"Acta Crystallogr. B"},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"1573","DOI":"10.1107\/S1600576715014685","article-title":"Profex: A Graphical User Interface for the Rietveld Refinement Program BGMN","volume":"48","author":"Doebelin","year":"2015","journal-title":"J. Appl. Cryst."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1154\/1.2179804","article-title":"R Factors in Rietveld Analysis: How Good Is Good Enough?","volume":"21","author":"Toby","year":"2006","journal-title":"Powder Diffr."},{"key":"ref_61","first-page":"1","article-title":"Synthesis and Characterization of CuO Nanoparticles by Aloe Barbadensis Leaves","volume":"2","author":"Sharma","year":"2021","journal-title":"Quantum J. Eng. Sci. Technol."},{"key":"ref_62","doi-asserted-by":"crossref","unstructured":"Chan, Y., Selvanathan, V., Tey, L.-H., Akhtaruzzaman, M., Anur, F., Djearamane, S., Watanabe, A., and Aminuzzaman, M. (2022). Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia Mangostana L. Leaf Extract. Nanomaterials, 12.","DOI":"10.3390\/nano12203589"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"11783","DOI":"10.1021\/acsomega.1c01512","article-title":"Photoinduced Fabrication of Zinc Oxide Nanoparticles: Transformation of Morphological and Biological Response on Light Irradiance","volume":"6","author":"Sajjad","year":"2021","journal-title":"ACS Omega"},{"key":"ref_64","doi-asserted-by":"crossref","unstructured":"You, W., Ahn, J.C., Boopathi, V., Arunkumar, L., Rupa, E.J., Akter, R., Kong, B.M., Lee, G.S., Yang, D.C., and Kang, S.C. (2021). Enhanced Antiobesity Efficacy of Tryptophan Using the Nanoformulation of Dendropanax Morbifera Extract Mediated with ZnO Nanoparticle. Materials, 14.","DOI":"10.3390\/ma14040824"},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"125018","DOI":"10.1088\/2053-1591\/aae243","article-title":"Effect of Calcination Temperature on the Physicochemical Properties of Zinc Oxide Nanoparticles Synthesized by Coprecipitation","volume":"5","author":"Baharudin","year":"2018","journal-title":"Mater. Res. Express"},{"key":"ref_66","doi-asserted-by":"crossref","unstructured":"Devesa, S., Gon\u00e7alves, F., and Gra\u00e7a, M. (2023). Influence of the Preparation Method on the Structural, Morphological and Dielectric Properties of FeNbO4 Ceramics. Materials, 16.","DOI":"10.3390\/ma16083202"},{"key":"ref_67","doi-asserted-by":"crossref","unstructured":"Devesa, S., Amorim, C.O., Belo, J.H., Ara\u00fajo, J.P., Teixeira, S.S., Gra\u00e7a, M.P.F., and Costa, L.C. (2024). Comprehensive Characterization of Bi1.34Fe0.66Nb1.34O6.35 Ceramics: Structural, Morphological, Electrical, and Magnetic Properties. Magnetochemistry, 10.","DOI":"10.3390\/magnetochemistry10100079"},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"34143","DOI":"10.1016\/j.ceramint.2024.06.233","article-title":"Growth Rate Effect on the Dielectric Properties of FeNbO4 Fibres Processed by the Laser Floating Zone Technique","volume":"50","author":"Devesa","year":"2024","journal-title":"Ceram. Int."},{"key":"ref_69","doi-asserted-by":"crossref","unstructured":"Gomes, E.d.S., Lima, A.M.d.O., Gavinho, S.R., Gra\u00e7a, M.P.F., Devesa, S., and Mac\u00eado, A.A.M. (2023). Influence of Polymeric Blends on Bioceramics of Hydroxyapatite. Crystals, 13.","DOI":"10.3390\/cryst13101429"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"020021","DOI":"10.1063\/1.5130231","article-title":"Dielectric Properties of Copper Oxide Nanoparticles Using AnnonaMuricata Leaf","volume":"2162","author":"Vindhya","year":"2019","journal-title":"AIP Conf. 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