{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/32090"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/32090","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Effect of size and surface structure manipulation on the luminescent properties of silicon nanoclusters","abstract":"Structures measuring several nanometers in any dimension represent a transitional scale between materials with crystalline order and molecules. Quantum confinement of the carrier wavefunction within such structures may significantly alter their electronic behavior. Additionally, the effect of surface reconstruction becomes substantial at this scale. This work investigated electronic and structural properties of silicon nanoclusters. Electrochemical etching was used to produce particles smaller than 3 nm in diameter. Electron microscopy and material analysis studies showed the particles to have a crystalline silicon core with significant structural reconstruction on the surface. Also, the clusters were found to be spherical in shape and quantized in size below 3 nm in diameter. The efficient luminescence of the material was studied and interpreted through the existing luminescence models. Surface modifications leading to functionalization were carried out. Both structural and luminescent characteristics of the modified clusters were studied, revealing a weak dependence of the luminescence efficiency on exchanging the surface hydrogen atoms for other single bonded species. The observed optical activity of silicon nanoclusters makes them an important material for a variety of scientific applications.","abstract_html":"Structures measuring several nanometers in any dimension represent a transitional scale between materials with crystalline order and molecules. Quantum confinement of the carrier wavefunction within such structures may significantly alter their electronic behavior. Additionally, the effect of surface reconstruction becomes substantial at this scale. This work investigated electronic and structural properties of silicon nanoclusters. Electrochemical etching was used to produce particles smaller than 3 nm in diameter. Electron microscopy and material analysis studies showed the particles to have a crystalline silicon core with significant structural reconstruction on the surface. Also, the clusters were found to be spherical in shape and quantized in size below 3 nm in diameter. The efficient luminescence of the material was studied and interpreted through the existing luminescence models. Surface modifications leading to functionalization were carried out. Both structural and luminescent characteristics of the modified clusters were studied, revealing a weak dependence of the luminescence efficiency on exchanging the surface hydrogen atoms for other single bonded species. The observed optical activity of silicon nanoclusters makes them an important material for a variety of scientific applications.","abstract_has_math":false,"creators":["Belomoin, Gennadiy A."],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Nayfeh, Munir H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-06-28T22:39:10Z","date_published":"2012-06-28T22:39:10Z","updated_at":"2026-07-22T22:25:30Z","subjects":["quantum confinement","surface reconstruction","silicon nanoclusters","electrochemical etching","luminescence efficiency"],"languages":["en"],"rights":["©2006 Belomoin"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["Q. 539.6 Tc6b","FILM 2006 B418"],"render_values":[{"text":"Q. 539.6 Tc6b","href":null,"code":true},{"text":"FILM 2006 B418","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/32090","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Nayfeh, Munir H."]},{"key":"dc:creator","label":"Author","values":["Belomoin, Gennadiy A."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-06-28T22:39:10Z","10000-01-01","2006"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["quantum confinement","surface reconstruction","silicon nanoclusters","electrochemical etching","luminescence efficiency"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["©2006 Belomoin"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["Q. 539.6 Tc6b","FILM 2006 B418","http://hdl.handle.net/2142/32090"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Structures measuring several nanometers in any dimension represent a transitional scale between materials with crystalline order and molecules. Quantum confinement of the carrier wavefunction within such structures may significantly alter their electronic behavior. Additionally, the effect of surface reconstruction becomes substantial at this scale. This work investigated electronic and structural properties of silicon nanoclusters. Electrochemical etching was used to produce particles smaller than 3 nm in diameter. Electron microscopy and material analysis studies showed the particles to have a crystalline silicon core with significant structural reconstruction on the surface. Also, the clusters were found to be spherical in shape and quantized in size below 3 nm in diameter. The efficient luminescence of the material was studied and interpreted through the existing luminescence models. Surface modifications leading to functionalization were carried out. Both structural and luminescent characteristics of the modified clusters were studied, revealing a weak dependence of the luminescence efficiency on exchanging the surface hydrogen atoms for other single bonded species. The observed optical activity of silicon nanoclusters makes them an important material for a variety of scientific applications.","Submitted by Rachelle Ramer (rramer2@illinois.edu) on 2012-06-28T22:39:10Z No. of bitstreams: 1 Belomoin_Gennadiy.pdf: 1321737 bytes, checksum: eb103e9687730cfc7b87c1ed681c4cc2 (MD5)","Made available in DSpace on 2012-06-28T22:39:10Z (GMT). No. of bitstreams: 1 Belomoin_Gennadiy.pdf: 1321737 bytes, checksum: eb103e9687730cfc7b87c1ed681c4cc2 (MD5) Previous issue date: 2006","Restriction data tranferred 2014-07-01T11:34:58-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: thesis/dissertation","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Rachelle Ramer (rramer2@illinois.edu) on 2012-06-28T22:39:10Z Item is restricted indefinitely.","thesis/dissertation","U of I Only"]},{"key":"dc:title","label":"Title","values":["Effect of size and surface structure manipulation on the luminescent properties of silicon nanoclusters"]}]}],"canonical_facts":{"dc:contributor":["Nayfeh, Munir H."],"dc:creator":["Belomoin, Gennadiy A."],"dc:date":["2012-06-28T22:39:10Z","10000-01-01","2006"],"dc:description":["Structures measuring several nanometers in any dimension represent a transitional scale between materials with crystalline order and molecules. Quantum confinement of the carrier wavefunction within such structures may significantly alter their electronic behavior. Additionally, the effect of surface reconstruction becomes substantial at this scale. This work investigated electronic and structural properties of silicon nanoclusters. Electrochemical etching was used to produce particles smaller than 3 nm in diameter. Electron microscopy and material analysis studies showed the particles to have a crystalline silicon core with significant structural reconstruction on the surface. Also, the clusters were found to be spherical in shape and quantized in size below 3 nm in diameter. The efficient luminescence of the material was studied and interpreted through the existing luminescence models. Surface modifications leading to functionalization were carried out. Both structural and luminescent characteristics of the modified clusters were studied, revealing a weak dependence of the luminescence efficiency on exchanging the surface hydrogen atoms for other single bonded species. The observed optical activity of silicon nanoclusters makes them an important material for a variety of scientific applications.","Submitted by Rachelle Ramer (rramer2@illinois.edu) on 2012-06-28T22:39:10Z No. of bitstreams: 1 Belomoin_Gennadiy.pdf: 1321737 bytes, checksum: eb103e9687730cfc7b87c1ed681c4cc2 (MD5)","Made available in DSpace on 2012-06-28T22:39:10Z (GMT). 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