{"_buckets": {"deposit": "5cdd7adc-0222-4346-8c1e-4a0935a3a292"}, "_deposit": {"id": "2403", "owners": [], "pid": {"revision_id": 0, "type": "recid", "value": "2403"}, "status": "published"}, "_oai": {"id": "oai:meral.edu.mm:recid/2403", "sets": ["user-uy"]}, "communities": ["ccm", "ccp", "kyauksetu", "ltc", "maas", "miit", "mlmu", "mmu", "mtlu", "mtu", "mub", "mude", "mufl", "pathein", "scu", "suoe", "tcu", "tgu", "tuh", "tum", "ucsm", "ucsmtla", "ucsmub", "ucspathein", "ucstaungoo", "ucsy", "udmm", "udmy", "uit", "um", "um1", "um2", "umkn", "umm", "uphy", "urj", "uvs", "uy", "yau", "ydbu", "ytu", "yude", "yueco", "yufl", "yuoe"], "control_number": "2403", "item_1583103067471": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "SYNTHESIS AND CHARACTERIZATION OF FLOWER-LIKE CUO NANOSTRVCTVRES BY HYDROTHERMAL METHOD", "subitem_1551255648112": "en"}]}, "item_1583103085720": {"attribute_name": "Description", "attribute_value_mlt": [{"interim": "Nanostructured CuO has been gaining interest due to its unique properties, which are of potential use in a wide variety of applications such as superconductors, gas and chemical sensors, supercapacitors, photocatalysts and antimicrobial agents [1]. In this study, unique flower-like CuO nanostructures were successfully synthesized by a simple hydrothermal method in NH3 solution at low temperature. In a typical synthesis, 4 M aqueous Cu (N03)2\r solution was placed into a teflon lined autoclave. The solution pH was adjusted dropwise to 8, 10 and 12 using 25wt.% ammonia, then allowed to react for 6 h at 120°C. The samples were characterized using X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The XRD patterns confirmed the presence of pure, highly crystalline monoclinic CuO at pH 10 and 12, as represented by the peaks at 32.5°,36.3°,39.4°,49.4°,54.3°,59.7°, 62.3°, 66.8°, 68.9°, 75.82° corresponding to its 110,11-1, 111, 20-2, 020, 202, 11-3, 31-1, 220 and 004 facets (JCPDS 05-661). Low crystallinity and presence of Cu(OH)2 peaks at 36.4° and 43.5° in the sample obtained at pH 8 implies incomplete reaction. SEM images confirmed the presence of nanoleaves at pH 8, and nanoflowers at pH 10 and 12. Growth of these CuO nanostructures could have originated from the formation of CuO nuclei, which acted as seeds for oriented growth into lamellar structure. They preferentially orient to a specific plane due to high surface energy and electrostatic interaction, which results to the further formation from lamellar to flower-like structures as the reaction progresses. At lower pH, the amount of OH- is not sufficient to drive the reaction forward, so the presence of fewer CuO products led to the formation of nanoleaves. Increasing the pH resulted to the presence of more OH- ions, driving the reaction to completion, and to the formation of more complex flower-like structures. This facile synthesis method can potentially be used for large scale and low cost fabrication of CuO nanostructures for advanced applications."}]}, "item_1583103108160": {"attribute_name": "Keywords", "attribute_value_mlt": [{"interim": "CuO nanostructures"}]}, "item_1583103120197": {"attribute_name": "Files", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "date": [{"dateType": "Available", "dateValue": "2020-05-05"}], "displaytype": "preview", "download_preview_message": "", "file_order": 0, "filename": "Synthesis and characterization of flower-like CUO Nanostructures by Hydrothermal method.pdf", "filesize": [{"value": "1145 Kb"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1145000.0, "url": {"url": "https://meral.edu.mm/record/2403/files/Synthesis and characterization of flower-like CUO Nanostructures by Hydrothermal method.pdf"}, "version_id": "c975cdfa-d499-4f44-ad80-ed800ea3249c"}]}, "item_1583103131163": {"attribute_name": "Journal articles", "attribute_value_mlt": [{"subitem_journal_title": "8th AUN/SEED-Net Regional Conference on Electrical and Electronics Engineering"}]}, "item_1583103147082": {"attribute_name": "Conference papaers", "attribute_value_mlt": [{}]}, "item_1583103211336": {"attribute_name": "Books/reports/chapters", "attribute_value_mlt": [{}]}, "item_1583103233624": {"attribute_name": "Thesis/dissertations", "attribute_value_mlt": [{"subitem_supervisor(s)": []}]}, "item_1583105942107": {"attribute_name": "Authors", "attribute_value_mlt": [{"subitem_authors": [{"subitem_authors_fullname": "Felizco, Jenichi Clairvaux E."}, {"subitem_authors_fullname": "Tan, Michael R."}, {"subitem_authors_fullname": "Mary Balela, Donnabelle L."}]}]}, "item_1583108359239": {"attribute_name": "Upload type", "attribute_value_mlt": [{"interim": "Other"}]}, "item_1583108428133": {"attribute_name": "Publication type", "attribute_value_mlt": [{"interim": "Other"}]}, "item_1583159729339": {"attribute_name": "Publication date", "attribute_value": "2015"}, "item_1583159847033": {"attribute_name": "Identifier", "attribute_value": "https://uyr.uy.edu.mm/handle/123456789/431"}, "item_title": "SYNTHESIS AND CHARACTERIZATION OF FLOWER-LIKE CUO NANOSTRVCTVRES BY HYDROTHERMAL METHOD", "item_type_id": "21", "owner": "1", "path": ["1582967549708"], "permalink_uri": "http://hdl.handle.net/20.500.12678/0000002403", "pubdate": {"attribute_name": "Deposited date", "attribute_value": "2020-03-05"}, "publish_date": "2020-03-05", "publish_status": "0", "recid": "2403", "relation": {}, "relation_version_is_last": true, "title": ["SYNTHESIS AND CHARACTERIZATION OF FLOWER-LIKE CUO NANOSTRVCTVRES BY HYDROTHERMAL METHOD"], "weko_shared_id": -1}