Document Detail


A mechanical metamaterial made from a DNA hydrogel.
MedLine Citation:
PMID:  23202472     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Metamaterials are artificial substances that are structurally engineered to have properties not typically found in nature. To date, almost all metamaterials have been made from inorganic materials such as silicon and copper, which have unusual electromagnetic or acoustic properties that allow them to be used, for example, as invisible cloaks, superlenses or super absorbers for sound. Here, we show that metamaterials with unusual mechanical properties can be prepared using DNA as a building block. We used a polymerase enzyme to elongate DNA chains and weave them non-covalently into a hydrogel. The resulting material, which we term a meta-hydrogel, has liquid-like properties when taken out of water and solid-like properties when in water. Moreover, upon the addition of water, and after complete deformation, the hydrogel can be made to return to its original shape. The meta-hydrogel has a hierarchical internal structure and, as an example of its potential applications, we use it to create an electric circuit that uses water as a switch.
Authors:
Jong Bum Lee; Songming Peng; Dayong Yang; Young Hoon Roh; Hisakage Funabashi; Nokyoung Park; Edward J Rice; Liwei Chen; Rong Long; Mingming Wu; Dan Luo
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-02
Journal Detail:
Title:  Nature nanotechnology     Volume:  -     ISSN:  1748-3395     ISO Abbreviation:  Nat Nanotechnol     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101283273     Medline TA:  Nat Nanotechnol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1] Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York 14853, USA [2] Department of Chemical Engineering, University of Seoul, Seoul 130-743, South Korea [3].
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