Investigations of silicon nano-crystal floating gate memories
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
Alcohol adducts of the N-heterocyclic carbene, 1,3,4-triphenyl-4,5-dihydro-lff-l,2-triazol-5-ylidene (NHC), function as excellent single-component catalyst/initiators for the ring-opening polymerization of lactide and β-butyrolactone, Their reversible dissociation at elevated temperatures generates alcohol and triazolylidene carbene to provide a facile entry to polymerization of cyclic esters on demand. Under optimum conditions, adverse transesterification reactions are minimized, and importantly, upon complete consumption of monomer, a second monomer addition facilitates additional polymer growth, even after precipitation. Block copolymers were prepared by combining disparate polymerization techniques from the use of oligo-adducts and bifunctional initiators. Additionally, more complex polymer architectures were prepared from multifunctional or dendritic initiators, further demonstrating the versatility of the N-heterocyclic carbene platform. © 2006 American Chemical Society.
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
T. Schneider, E. Stoll
Physical Review B
Sung Ho Kim, Oun-Ho Park, et al.
Small
Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters