Long-armed hexapod nanocrystals of cesium lead bromide
Colloidal lead halide perovskite nanocrystals (LHP NCs) assume a variety of morphologies ( e.g. cubes, sheets, and wires). Their labile structural and surface characters allow them to undergo post-synthetic evolution of shape and crystallographic characters. Such transformations can be advantageous...
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| Veröffentlicht in: | Nanoscale 2020-07, Vol.12 (27), p.1488-14817 |
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| creator | Li, Shangkun Probst, Julie Howes, Philip D deMello, Andrew J |
| description | Colloidal lead halide perovskite nanocrystals (LHP NCs) assume a variety of morphologies (
e.g.
cubes, sheets, and wires). Their labile structural and surface characters allow them to undergo post-synthetic evolution of shape and crystallographic characters. Such transformations can be advantageous or deleterious, and it is therefore vital to both understand and exert control over these processes. In this study, we report novel long-armed hexapod structures of cesium lead bromide nanocrystals. These branched structures evolve from quantum-confined CsPbBr
3
nanosheets to Cs
4
PbBr
6
hexapods over a period of 24 hours. Time-resolved optical and structural characterization reveals a post-synthesis mechanism of phase transformation, oriented attachment and branch elongation. More generally, the study reveals important processes associated with LHP NC aging and demonstrates the utility of slow reaction kinetics in obtaining complex morphologies.
Cesium lead bromide nanosheets undergo a slow transformation from nanosheets to long-armed hexapods, revealing the utility of extended incubation times in perovskite nanocrystal shape control. |
| doi_str_mv | 10.1039/d0nr02985h |
| format | Article |
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e.g.
cubes, sheets, and wires). Their labile structural and surface characters allow them to undergo post-synthetic evolution of shape and crystallographic characters. Such transformations can be advantageous or deleterious, and it is therefore vital to both understand and exert control over these processes. In this study, we report novel long-armed hexapod structures of cesium lead bromide nanocrystals. These branched structures evolve from quantum-confined CsPbBr
3
nanosheets to Cs
4
PbBr
6
hexapods over a period of 24 hours. Time-resolved optical and structural characterization reveals a post-synthesis mechanism of phase transformation, oriented attachment and branch elongation. More generally, the study reveals important processes associated with LHP NC aging and demonstrates the utility of slow reaction kinetics in obtaining complex morphologies.
Cesium lead bromide nanosheets undergo a slow transformation from nanosheets to long-armed hexapods, revealing the utility of extended incubation times in perovskite nanocrystal shape control.</description><identifier>ISSN: 2040-3364</identifier><identifier>EISSN: 2040-3372</identifier><identifier>DOI: 10.1039/d0nr02985h</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Cesium ; Crystallography ; Cubes ; Elongation ; Lead compounds ; Metal halides ; Morphology ; Nanocrystals ; Perovskites ; Phase transitions ; Reaction kinetics ; Structural analysis</subject><ispartof>Nanoscale, 2020-07, Vol.12 (27), p.1488-14817</ispartof><rights>Copyright Royal Society of Chemistry 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-9a076825dc0bdb25d41bc04dce507eb062fe6f66410d6b99482e9f3d14fd10003</citedby><cites>FETCH-LOGICAL-c376t-9a076825dc0bdb25d41bc04dce507eb062fe6f66410d6b99482e9f3d14fd10003</cites><orcidid>0000-0002-0247-2883 ; 0000-0002-1862-8395 ; 0000-0003-1943-1356</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Li, Shangkun</creatorcontrib><creatorcontrib>Probst, Julie</creatorcontrib><creatorcontrib>Howes, Philip D</creatorcontrib><creatorcontrib>deMello, Andrew J</creatorcontrib><title>Long-armed hexapod nanocrystals of cesium lead bromide</title><title>Nanoscale</title><description>Colloidal lead halide perovskite nanocrystals (LHP NCs) assume a variety of morphologies (
e.g.
cubes, sheets, and wires). Their labile structural and surface characters allow them to undergo post-synthetic evolution of shape and crystallographic characters. Such transformations can be advantageous or deleterious, and it is therefore vital to both understand and exert control over these processes. In this study, we report novel long-armed hexapod structures of cesium lead bromide nanocrystals. These branched structures evolve from quantum-confined CsPbBr
3
nanosheets to Cs
4
PbBr
6
hexapods over a period of 24 hours. Time-resolved optical and structural characterization reveals a post-synthesis mechanism of phase transformation, oriented attachment and branch elongation. More generally, the study reveals important processes associated with LHP NC aging and demonstrates the utility of slow reaction kinetics in obtaining complex morphologies.
Cesium lead bromide nanosheets undergo a slow transformation from nanosheets to long-armed hexapods, revealing the utility of extended incubation times in perovskite nanocrystal shape control.</description><subject>Cesium</subject><subject>Crystallography</subject><subject>Cubes</subject><subject>Elongation</subject><subject>Lead compounds</subject><subject>Metal halides</subject><subject>Morphology</subject><subject>Nanocrystals</subject><subject>Perovskites</subject><subject>Phase transitions</subject><subject>Reaction kinetics</subject><subject>Structural analysis</subject><issn>2040-3364</issn><issn>2040-3372</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp90MtLAzEQBvAgCmr14l1Y8SLC6uSx2eYo9VGhKIieQzYPu2V3syZdsP-9qZUKHjzNwPdjGD6ETjBcYaDi2kAXgIhxMd9BBwQY5JSWZHe7c7aPDmNcAHBBOT1AfOa791yF1ppsbj9V703Wqc7rsIpL1cTMu0zbWA9t1lhlsir4tjb2CO25lNrjnzlCb_d3r5NpPnt-eJzczHJNS77MhYKSj0lhNFSmSpPhSgMz2hZQ2go4cZY7zhkGwysh2JhY4ajBzBkMAHSELjZ3--A_BhuXsq2jtk2jOuuHKAkjGGMiGEv0_A9d-CF06bu1YlBAwcqkLjdKBx9jsE72oW5VWEkMcl2hvIWnl-8KpwmfbnCIeut-K0752X-57I2jXxkid14</recordid><startdate>20200716</startdate><enddate>20200716</enddate><creator>Li, Shangkun</creator><creator>Probst, Julie</creator><creator>Howes, Philip D</creator><creator>deMello, Andrew J</creator><general>Royal Society of Chemistry</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-0247-2883</orcidid><orcidid>https://orcid.org/0000-0002-1862-8395</orcidid><orcidid>https://orcid.org/0000-0003-1943-1356</orcidid></search><sort><creationdate>20200716</creationdate><title>Long-armed hexapod nanocrystals of cesium lead bromide</title><author>Li, Shangkun ; Probst, Julie ; Howes, Philip D ; deMello, Andrew J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c376t-9a076825dc0bdb25d41bc04dce507eb062fe6f66410d6b99482e9f3d14fd10003</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Cesium</topic><topic>Crystallography</topic><topic>Cubes</topic><topic>Elongation</topic><topic>Lead compounds</topic><topic>Metal halides</topic><topic>Morphology</topic><topic>Nanocrystals</topic><topic>Perovskites</topic><topic>Phase transitions</topic><topic>Reaction kinetics</topic><topic>Structural analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Shangkun</creatorcontrib><creatorcontrib>Probst, Julie</creatorcontrib><creatorcontrib>Howes, Philip D</creatorcontrib><creatorcontrib>deMello, Andrew J</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Nanoscale</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Shangkun</au><au>Probst, Julie</au><au>Howes, Philip D</au><au>deMello, Andrew J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Long-armed hexapod nanocrystals of cesium lead bromide</atitle><jtitle>Nanoscale</jtitle><date>2020-07-16</date><risdate>2020</risdate><volume>12</volume><issue>27</issue><spage>1488</spage><epage>14817</epage><pages>1488-14817</pages><issn>2040-3364</issn><eissn>2040-3372</eissn><abstract>Colloidal lead halide perovskite nanocrystals (LHP NCs) assume a variety of morphologies (
e.g.
cubes, sheets, and wires). Their labile structural and surface characters allow them to undergo post-synthetic evolution of shape and crystallographic characters. Such transformations can be advantageous or deleterious, and it is therefore vital to both understand and exert control over these processes. In this study, we report novel long-armed hexapod structures of cesium lead bromide nanocrystals. These branched structures evolve from quantum-confined CsPbBr
3
nanosheets to Cs
4
PbBr
6
hexapods over a period of 24 hours. Time-resolved optical and structural characterization reveals a post-synthesis mechanism of phase transformation, oriented attachment and branch elongation. More generally, the study reveals important processes associated with LHP NC aging and demonstrates the utility of slow reaction kinetics in obtaining complex morphologies.
Cesium lead bromide nanosheets undergo a slow transformation from nanosheets to long-armed hexapods, revealing the utility of extended incubation times in perovskite nanocrystal shape control.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/d0nr02985h</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0002-0247-2883</orcidid><orcidid>https://orcid.org/0000-0002-1862-8395</orcidid><orcidid>https://orcid.org/0000-0003-1943-1356</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2040-3364 |
| ispartof | Nanoscale, 2020-07, Vol.12 (27), p.1488-14817 |
| issn | 2040-3364 2040-3372 |
| language | eng |
| recordid | cdi_rsc_primary_d0nr02985h |
| source | Royal Society Of Chemistry Journals |
| subjects | Cesium Crystallography Cubes Elongation Lead compounds Metal halides Morphology Nanocrystals Perovskites Phase transitions Reaction kinetics Structural analysis |
| title | Long-armed hexapod nanocrystals of cesium lead bromide |
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