Journal ArticleDOI
Synthesis of cadmium sulphide superlattices using self-assembled bacterial S-layers
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In this paper, the authors describe the use of bacterial S-layers as templates for the in situ nucleation of ordered two-dimensional arrays of cadmium sulphide nanocrystals about 5nm in size.Abstract:
Methods for organizing materials at the nanometre scale have advanced tremendously in recent years1,2. One important objective is the synthesis of patterned arrays of inorganic nanocrystals3,4,5,6, whose optical, electronic and magnetic properties might find technological uses, for example as memory elements. Techniques such as colloidal crystallization7,8,9, monolayer deposition10,11,12, multilayer casting13, molecular crosslinking14,15, the use of complementary interactions16,17 and the synthesis of nanoparticles in patterned etch pits18 have been used to organize nanocrystals into superlattices. Here we describe the use of bacterial S-layers — self-assembled, two-dimensionally ordered films of proteins that feature in many bacterial cell walls — as templates for the in situ nucleation of ordered two-dimensional arrays of cadmium sulphide nanocrystals about 5 nm in size. Nucleation of the inorganic phase is confined to the pores between subunits in the S-layers. Two-tier stacks of nanoparticles can be formed in the presence of double-layered protein crystals. The structural diversity of S-layers19,20, their ease of self-assembly on a wide range of substrates and the potential for surface chemical modification suggest that this approach could be exploited to offer a wide range of ordered nanoparticle arrays.read more
Citations
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Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications
Eugenii Katz,Itamar Willner +1 more
TL;DR: This review describes recent advances in the synthesis of biomolecule-nanoparticle/nanorod hybrid systems and the application of such assemblies in the generation of 2D and 3D ordered structures in solutions and on surfaces.
Journal ArticleDOI
Nanoparticles, Proteins, and Nucleic Acids: Biotechnology Meets Materials Science
TL;DR: This review is focused on current approaches emerging at the intersection of materials research, nanosciences, and molecular biotechnology, which is closely associated with both the physical and chemical properties of organic and inorganic nanoparticles.
Journal ArticleDOI
Structural diversity in binary nanoparticle superlattices
Elena V. Shevchenko,Dmitri V. Talapin,Dmitri V. Talapin,Nicholas A. Kotov,Stephen O'Brien,Christopher B. Murray +5 more
TL;DR: It is demonstrated that electrical charges on sterically stabilized nanoparticles determine B NSL stoichiometry; additional contributions from entropic, van der Waals, steric and dipolar forces stabilize the variety of BNSL structures.
Journal ArticleDOI
Biological synthesis of metal nanoparticles by microbes.
TL;DR: The current status of microbial synthesis and applications of metal nanoparticles is presented and several factors such as microbial cultivation methods and the extraction techniques have to be optimized and the combinatorial approach such as photobiological methods may be used.
References
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Journal ArticleDOI
A DNA-based Method for Rationally Assembling Nanoparticles Into Macroscopic Materials
TL;DR: A method for assembling colloidal gold nanoparticles rationally and reversibly into macroscopic aggregates by using the specificity of DNA interactions to direct the interactions between particles of different size and composition is described.
Journal ArticleDOI
Organization of 'nanocrystal molecules' using DNA
A. Paul Alivisatos,A. Paul Alivisatos,Kai Johnsson,Xiaogang Peng,Xiaogang Peng,Troy E. Wilson,Colin J. Loweth,Marcel P. Bruchez,Marcel P. Bruchez,Peter G. Schultz +9 more
TL;DR: A strategy for the synthesis of 'nanocrystal molecules', in which discrete numbers of gold nanocrystals are organized into spatially defined structures based on Watson-Crick base-pairing interactions is described.
Journal ArticleDOI
Self-Organization of CdSe Nanocrystallites into Three-Dimensional Quantum Dot Superlattices
TL;DR: In this article, the self-organization of CdSe nanocrystallites into three-dimensional semiconductor quantum dot superlattices (colloidal crystals) is demonstrated.
Journal ArticleDOI
Nanocrystal gold molecules
Robert L. Whetten,Joseph T. Khoury,Marcos M. Alvarez,Srihari Murthy,Igor Vezmar,Zhong Lin Wang,Peter W. Stephens,Charles L. Cleveland,W. D. Luedtke,Uzi Landman +9 more
TL;DR: In this article, a series of gold nanocrystals, passivated by self-assembled monolayers (SAMs) of straight-chain alkylthiolate molecules (RS, R) are described.
Journal ArticleDOI
Synthesis of inorganic materials with complex form
Stephen Mann,Geoffrey A. Ozin +1 more
TL;DR: Inorganic materials with complex form can be chemically synthesized by pattern replication of self-organized organic assemblies, such as micelles, vesicles and foams as mentioned in this paper.
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