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Stoichiometric control of DNA-grafted colloid self-assembly

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [1];  [1];  [2];  [3];  [4];  [4]
  1. Department of Chemical Engineering, Columbia University, New York, NY 10027,
  2. Department of Chemical Engineering, Indian Institute of Technology, Gandhinagar 382424, India, and
  3. Department of Chemical Engineering, Columbia University, New York, NY 10027,, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
  4. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
Significance

Recently, there has been an increased interest in understanding the self-assembly of DNA-grafted colloids into different morphologies. Conventional approaches assume that the critical design parameters are the size and number of DNA grafts on each particle. Stoichiometry is viewed as a secondary variable and its exact role in this context is unresolved. In contrast with these expectations, our experiments show that the equilibrium lattice structure can be tuned through variations in the imposed stoichiometry. These findings are captured through simple extensions of the complementary contact model. Stoichiometry is thus shown to be a powerful handle to control these self-assembled structures.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-98CH10886
OSTI ID:
1235164
Alternate ID(s):
OSTI ID: 1229365
OSTI ID: 1188276
Report Number(s):
BNL--108126-2015-JA
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 16 Vol. 112; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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