Nucleotide-directed growth of semiconductor nanocrystals

Journal of the American Chemical Society

Volumn 128, Issue 1, 2006, Pages 64-65

  Hinds, Sean ^a   Taft, Bradford J ^b   Levina, Larissa ^a   Sukhovatkin, Vlad ^a   Dooley, Chad J ^b   Roy, Marc D ^b   MacNeil, Dean D ^a   Sargent, Edward H ^a   Kelley, Shana O ^b  

^a UNIVERSITY OF TORONTO   (Canada)

^b BOSTON COLLEGE   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ADENOSINE TRIPHOSPHATE; CYTIDINE TRIPHOSPHATE; GUANOSINE TRIPHOSPHATE; LEAD SULFIDE; LIGAND; NANOCRYSTAL; NANOPARTICLE; NUCLEOTIDE; QUANTUM DOT; URIDINE TRIPHOSPHATE;

AQUEOUS SOLUTION; ARTICLE; BIOMOLECULAR ELECTRONICS; CRYSTALLIZATION; SEMICONDUCTOR; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY;

ADENOSINE TRIPHOSPHATE; CRYSTALLIZATION; CYTIDINE TRIPHOSPHATE; GUANOSINE TRIPHOSPHATE; LEAD; NANOSTRUCTURES; NUCLEOTIDES; QUANTUM DOTS; SEMICONDUCTORS; SULFIDES; URIDINE TRIPHOSPHATE;

EID: 30844473742     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja057002+     Document Type: Article

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11. All syntheses were performed at 1:1 lead-to-sulfur precursor molar ratio in 2 mL Eppendorf tubes at room temperature with vortex agitation. In a typical synthesis, 100 μL of 10 mM lead precursor was added to 250 mL of 13.4 mM NT/NS and mixed, followed by 5-min incubation. Then 100 μL of 10 mM sodium sulfide was quickly injected to the reaction tube. The solution immediately turned from transparent to red-brown, indicating the formation of PbS nanocrystals. The supernatant was removed from precipitate after centrifuging at 4000 rpm for 5 min. These syntheses were reproducible and did not require postsynthesis manipulation or processing. See Supporting Information for more details.
12. See Supporting Information for information about TEM, FTIR, and luminescence measurements.
13. The observed 150 nm spectral shift would correspond to a 1 nm size difference not clearly resolved through the TEM images presented herein. Therefore, while the shift may reflect an altered nanoparticle size, the origin of this spectral feature cannot be specifically assigned.
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