Positionally Defined, Binary Semiconductor Nanoparticles Synthesized by Scanning Probe Block Copolymer Lithography

Nano Letters ◽  
2012 ◽  
Vol 12 (2) ◽  
pp. 1022-1025 ◽  
Author(s):  
Louise R. Giam ◽  
Shu He ◽  
Noah E. Horwitz ◽  
Daniel J. Eichelsdoerfer ◽  
Jinan Chai ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Semiconductor Nanoparticles ◽  
Scanning Probe ◽  
Block Copolymer Lithography ◽  
Probe Block ◽  
Copolymer Lithography

scholarly journals Catalyst design by scanning probe block copolymer lithography

2018 ◽  
Vol 115 (15) ◽  
pp. 3764-3769 ◽  
Author(s):  
Liliang Huang ◽  
Peng-Cheng Chen ◽  
Mohan Liu ◽  
Xianbiao Fu ◽  
Pavlo Gordiichuk ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Hydrogen Evolution ◽  
Density Functional ◽  
Hydrogen Adsorption ◽  
Catalyst Design ◽  
Scanning Probe ◽  
Single Element ◽  
Block Copolymer Lithography ◽  
Probe Block ◽  
Copolymer Lithography

Scanning probe block copolymer lithography (SPBCL), in combination with density-functional theory (DFT), has been used to design and synthesize hydrogen evolution catalysts. DFT was used to calculate the hydrogen adsorption energy on a series of single-element, bimetallic, and trimetallic (Au, Pt, Ni, and Cu) substrates to provide leads that could be synthesized in the form of alloy or phase-separated particles via SPBCL. PtAuCu (18 nm, ∼1:1:1 stoichiometry) has been identified as a homogeneous alloy phase that behaves as an effective hydrogen evolution catalyst in acidic aqueous media, even when it is made in bulk form via solution phase methods. Significantly, the bulk-prepared PtAuCu/C nanocatalyst discovered via this process exhibits an activity seven times higher than that of the state-of-the-art commercial Pt/C catalyst (based upon Pt content). The advantage of using SPBCL in the discovery process is that one can uniformly make particles, each consisting of a uniform phase combination (e.g., all alloy or all phase-segregated species) at a fixed elemental ratio, an important consideration when working with polyelemental species where multiple phases may exist.

scholarly journals Scanning probe block copolymer lithography

2010 ◽  
Vol 107 (47) ◽  
pp. 20202-20206 ◽  
Author(s):  
J. Chai ◽  
F. Huo ◽  
Z. Zheng ◽  
L. R. Giam ◽  
W. Shim ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Scanning Probe ◽  
Block Copolymer Lithography ◽  
Probe Block ◽  
Copolymer Lithography

Block copolymer self-assembly assisted fabrication of laterally organized- and stacked- nanoarrays

2021 ◽  
Author(s):  
Vignesh Suresh ◽  
Ah Bian Chew ◽  
Christina Yuan Ling Tan ◽  
Hui Ru Tan
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
The Self ◽  
Functional Surfaces ◽  
Self Assembled ◽  
Block Copolymer Lithography ◽  
Unique Surface ◽  
Copolymer Lithography

Abstract Block copolymer (BCP) self-assembly processes are often seen as reliable techniques for advanced nanopatterning to achieve functional surfaces and create templates for nanofabrication. By taking advantage of the tunability in pitch, diameter and feature-to-feature separation of the self-assembled BCP features, complex, laterally organized- and stacked- multicomponent nanoarrays comprising of gold and polymer have been fabricated. The approaches not only demonstrate nanopatterning of up to two levels of hierarchy but also investigate how a variation in the feature-to-feature gap at the first hierarchy affects the self-assembly of polymer features at the second. Such BCP self-assembly enabled multicomponent nanoarray configurations are rarely achieved by other nanofabrication approaches and are particularly promising for pushing the boundaries of block copolymer lithography and in creating unique surface architectures and complex morphologies at the nanoscale.

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