TY - JOUR
T1 - Asymmetric quantum dot growth via temperature cycling
AU - Alam, Rabeka
AU - Maye, Mathew M.
N1 - Funding Information:
We thank the Department of Chemistry and the Syracuse Biomaterials Institute (SBI) for generous start-up support. This work is partially supported by a Department of Defense PECASE award, sponsored by AFOSR ( FA9550-10-1-0033 ), and the ACS Petroleum Research Fund ( 51303-DNI10 ).
PY - 2012/1/15
Y1 - 2012/1/15
N2 - The morphology of semiconductive quantum dots (qdots) and quantum rods (qrods) has been shown to be tailored by choice of ligand, size, and crystal structure. In this paper, we show that temperature cycling during nucleation and growth can also tailor morphology. By quenching nucleation and growth after precursor injection, followed by slow temperature ramping, we are able to first synthesis CdSe qdots with teardrop morphology and Wurtzite crystallinity. Using these teardrops as core seeds, CdS shells can be epitaxially deposited also using temperature cycling to fabricate CdSe/CdS core/shell structures with novel asymmetric head-tail morphology. These qdots and qrods were characterized for optical absorption, photoluminescent emission, morphology, and crystal structure.
AB - The morphology of semiconductive quantum dots (qdots) and quantum rods (qrods) has been shown to be tailored by choice of ligand, size, and crystal structure. In this paper, we show that temperature cycling during nucleation and growth can also tailor morphology. By quenching nucleation and growth after precursor injection, followed by slow temperature ramping, we are able to first synthesis CdSe qdots with teardrop morphology and Wurtzite crystallinity. Using these teardrops as core seeds, CdS shells can be epitaxially deposited also using temperature cycling to fabricate CdSe/CdS core/shell structures with novel asymmetric head-tail morphology. These qdots and qrods were characterized for optical absorption, photoluminescent emission, morphology, and crystal structure.
KW - Asymmetric
KW - Nanomaterials
KW - Quantum dots
UR - http://www.scopus.com/inward/record.url?scp=84856230803&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856230803&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2011.10.038
DO - 10.1016/j.ica.2011.10.038
M3 - Article
AN - SCOPUS:84856230803
SN - 0020-1693
VL - 380
SP - 114
EP - 117
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -