Size and Bandgap Control in the Solution-Phase Synthesis of Near-Infrared-Emitting Germanium Nanocrystals
We present a novel colloidal synthesis of alkyl-terminated Ge nanocrystals based on the reduction of GeI4/GeI2 mixtures. The size of the nanocrystals (2.3−11.3 nm) was controlled by adjusting both the Ge(IV)/Ge(II) ratio and the temperature ramp rate following reductant injection. The near-infrared...
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| Veröffentlicht in: | ACS nano 2010-12, Vol.4 (12), p.7459-7466 |
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| creator | Ruddy, Daniel A Johnson, Justin C Smith, E. Ryan Neale, Nathan R |
| description | We present a novel colloidal synthesis of alkyl-terminated Ge nanocrystals based on the reduction of GeI4/GeI2 mixtures. The size of the nanocrystals (2.3−11.3 nm) was controlled by adjusting both the Ge(IV)/Ge(II) ratio and the temperature ramp rate following reductant injection. The near-infrared absorption (1.6−0.70 eV) and corresponding band-edge emission demonstrate the highly tunable quantum confinement effects in Ge nanocrystals prepared using this mixed-valence precursor method. A mechanism is proposed for the observed size control, which relies upon the difference in reduction temperatures for Ge(II) versus Ge(IV). |
| doi_str_mv | 10.1021/nn102728u |
| format | Article |
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A mechanism is proposed for the observed size control, which relies upon the difference in reduction temperatures for Ge(II) versus Ge(IV).</description><identifier>ISSN: 1936-0851</identifier><identifier>EISSN: 1936-086X</identifier><identifier>DOI: 10.1021/nn102728u</identifier><identifier>PMID: 21090762</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>bandgap control ; Colloids ; Germanium - chemistry ; germanium nanocrystal ; infrared emission ; Infrared Rays ; Iodides - chemistry ; MATERIALS SCIENCE ; mechanism ; Metal Nanoparticles - chemistry ; NANOSCIENCE AND NANOTECHNOLOGY ; Particle Size ; quantum confinement ; size control ; Solutions ; Temperature</subject><ispartof>ACS nano, 2010-12, Vol.4 (12), p.7459-7466</ispartof><rights>Copyright © 2010 American Chemical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a407t-5c52236f028c76fd0f91b6bff8f750fce3749bdb609263d1cc645995f9fc8b913</citedby><cites>FETCH-LOGICAL-a407t-5c52236f028c76fd0f91b6bff8f750fce3749bdb609263d1cc645995f9fc8b913</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/nn102728u$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/nn102728u$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>230,314,777,781,882,2752,27057,27905,27906,56719,56769</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21090762$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/1254102$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Ruddy, Daniel A</creatorcontrib><creatorcontrib>Johnson, Justin C</creatorcontrib><creatorcontrib>Smith, E. Ryan</creatorcontrib><creatorcontrib>Neale, Nathan R</creatorcontrib><creatorcontrib>National Renewable Energy Lab. (NREL), Golden, CO (United States)</creatorcontrib><title>Size and Bandgap Control in the Solution-Phase Synthesis of Near-Infrared-Emitting Germanium Nanocrystals</title><title>ACS nano</title><addtitle>ACS Nano</addtitle><description>We present a novel colloidal synthesis of alkyl-terminated Ge nanocrystals based on the reduction of GeI4/GeI2 mixtures. The size of the nanocrystals (2.3−11.3 nm) was controlled by adjusting both the Ge(IV)/Ge(II) ratio and the temperature ramp rate following reductant injection. The near-infrared absorption (1.6−0.70 eV) and corresponding band-edge emission demonstrate the highly tunable quantum confinement effects in Ge nanocrystals prepared using this mixed-valence precursor method. A mechanism is proposed for the observed size control, which relies upon the difference in reduction temperatures for Ge(II) versus Ge(IV).</description><subject>bandgap control</subject><subject>Colloids</subject><subject>Germanium - chemistry</subject><subject>germanium nanocrystal</subject><subject>infrared emission</subject><subject>Infrared Rays</subject><subject>Iodides - chemistry</subject><subject>MATERIALS SCIENCE</subject><subject>mechanism</subject><subject>Metal Nanoparticles - chemistry</subject><subject>NANOSCIENCE AND NANOTECHNOLOGY</subject><subject>Particle Size</subject><subject>quantum confinement</subject><subject>size control</subject><subject>Solutions</subject><subject>Temperature</subject><issn>1936-0851</issn><issn>1936-086X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkM1KAzEURoMoVqsLX0CCIOJiNMk0mclSi38gKqjgLmQySRuZSWqSWdSnN9LalZv73Xs5fIsDwBFGFxgRfOlcjorUwxbYw7xkBarZx_Zmp3gE9mP8RIhWdcV2wYhgxFHFyB6wr_ZbQ-laeJ3HTC7g1LsUfAetg2mu4avvhmS9K17mMuZz6fI32gi9gU9ahuLBmSCDboub3qZk3Qze6dBLZ4cePknnVVjGJLt4AHZMDn24zjF4v715m94Xj893D9Orx0JOUJUKqighJTOI1KpipkWG44Y1xtSmosgoXVYT3rQNQ5ywssVKsQnlnBpuVN1wXI7ByarXx2RFVDZpNVfeOa2SwIROsqsMna2gRfBfg45J9DYq3XXSaT9EURNMOaOUZfJ8RargYwzaiEWwvQxLgZH4tS829jN7vG4dml63G_JPdwZOV4BUUXz6Ibhs4p-iHx3si-U</recordid><startdate>20101228</startdate><enddate>20101228</enddate><creator>Ruddy, Daniel A</creator><creator>Johnson, Justin C</creator><creator>Smith, E. 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Ryan</creatorcontrib><creatorcontrib>Neale, Nathan R</creatorcontrib><creatorcontrib>National Renewable Energy Lab. (NREL), Golden, CO (United States)</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>ACS nano</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ruddy, Daniel A</au><au>Johnson, Justin C</au><au>Smith, E. Ryan</au><au>Neale, Nathan R</au><aucorp>National Renewable Energy Lab. (NREL), Golden, CO (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Size and Bandgap Control in the Solution-Phase Synthesis of Near-Infrared-Emitting Germanium Nanocrystals</atitle><jtitle>ACS nano</jtitle><addtitle>ACS Nano</addtitle><date>2010-12-28</date><risdate>2010</risdate><volume>4</volume><issue>12</issue><spage>7459</spage><epage>7466</epage><pages>7459-7466</pages><issn>1936-0851</issn><eissn>1936-086X</eissn><abstract>We present a novel colloidal synthesis of alkyl-terminated Ge nanocrystals based on the reduction of GeI4/GeI2 mixtures. The size of the nanocrystals (2.3−11.3 nm) was controlled by adjusting both the Ge(IV)/Ge(II) ratio and the temperature ramp rate following reductant injection. The near-infrared absorption (1.6−0.70 eV) and corresponding band-edge emission demonstrate the highly tunable quantum confinement effects in Ge nanocrystals prepared using this mixed-valence precursor method. A mechanism is proposed for the observed size control, which relies upon the difference in reduction temperatures for Ge(II) versus Ge(IV).</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>21090762</pmid><doi>10.1021/nn102728u</doi><tpages>8</tpages></addata></record> |
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| identifier | ISSN: 1936-0851 |
| ispartof | ACS nano, 2010-12, Vol.4 (12), p.7459-7466 |
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| language | eng |
| recordid | cdi_osti_scitechconnect_1254102 |
| source | MEDLINE; ACS Publications |
| subjects | bandgap control Colloids Germanium - chemistry germanium nanocrystal infrared emission Infrared Rays Iodides - chemistry MATERIALS SCIENCE mechanism Metal Nanoparticles - chemistry NANOSCIENCE AND NANOTECHNOLOGY Particle Size quantum confinement size control Solutions Temperature |
| title | Size and Bandgap Control in the Solution-Phase Synthesis of Near-Infrared-Emitting Germanium Nanocrystals |
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