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Title: 3D Nanofabrication via Chemo-Mechanical Transformation of Nanocrystal/Bulk Heterostructures

In this paper, planar nanocrystal/bulk heterostructures are transformed into 3D architectures by taking advantage of the different chemical and mechanical properties of nanocrystal and bulk thin films. Nanocrystal/bulk heterostructures are fabricated via bottom-up assembly and top-down fabrication. The nanocrystals are capped by long ligands introduced in their synthesis, and therefore their surfaces are chemically addressable, and their assemblies are mechanically “soft,” in contrast to the bulk films. Chemical modification of the nanocrystal surface, exchanging the long ligands for more compact chemistries, triggers large volume shrinkage of the nanocrystal layer and drives bending of the nanocrystal/bulk heterostructures. Finally, exploiting the differential chemo-mechanical properties of nanocrystal and bulk materials, the scalable fabrication of designed 3D, cell-sized nanocrystal/bulk superstructures is demonstrated, which possess unique functions derived from nanocrystal building blocks.
Authors:
ORCiD logo [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4] ;  [2] ;  [5] ;  [6] ;  [7] ; ORCiD logo [1]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Electrical and Systems Engineering. Dept. of Chemistry. Dept. of Materials Science and Engineering
  2. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
  3. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Chemistry
  4. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Electrical and Systems Engineering
  5. Karlsruhe Inst. of Technology (KIT) (Germany). Karlsruhe Nano Micro Facility. Inst. of Nanotechnology
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  7. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Chemistry. Dept. of Materials Science and Engineering
Publication Date:
Report Number(s):
BNL-207949-2018-JAAM
Journal ID: ISSN 0935-9648
Grant/Contract Number:
SC0012704; SC0001004; CMMI-1562884; NSF-561658; DMR-1720530
Type:
Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 22; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Chinese Scholarship Counsel (CSC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 3D patterning; folding; ligand chemistry; nanocrystal; nanoimprint lithography
OSTI Identifier:
1464114
Alternate Identifier(s):
OSTI ID: 1433271

Zhang, Mingliang, Guo, Jiacen, Yu, Yao, Wu, Yaoting, Yun, Hongseok, Jishkariani, Davit, Chen, Wenxiang, Greybush, Nicholas J., Kübel, Christian, Stein, Aaron, Murray, Christopher B., and Kagan, Cherie R.. 3D Nanofabrication via Chemo-Mechanical Transformation of Nanocrystal/Bulk Heterostructures. United States: N. p., Web. doi:10.1002/adma.201800233.
Zhang, Mingliang, Guo, Jiacen, Yu, Yao, Wu, Yaoting, Yun, Hongseok, Jishkariani, Davit, Chen, Wenxiang, Greybush, Nicholas J., Kübel, Christian, Stein, Aaron, Murray, Christopher B., & Kagan, Cherie R.. 3D Nanofabrication via Chemo-Mechanical Transformation of Nanocrystal/Bulk Heterostructures. United States. doi:10.1002/adma.201800233.
Zhang, Mingliang, Guo, Jiacen, Yu, Yao, Wu, Yaoting, Yun, Hongseok, Jishkariani, Davit, Chen, Wenxiang, Greybush, Nicholas J., Kübel, Christian, Stein, Aaron, Murray, Christopher B., and Kagan, Cherie R.. 2018. "3D Nanofabrication via Chemo-Mechanical Transformation of Nanocrystal/Bulk Heterostructures". United States. doi:10.1002/adma.201800233.
@article{osti_1464114,
title = {3D Nanofabrication via Chemo-Mechanical Transformation of Nanocrystal/Bulk Heterostructures},
author = {Zhang, Mingliang and Guo, Jiacen and Yu, Yao and Wu, Yaoting and Yun, Hongseok and Jishkariani, Davit and Chen, Wenxiang and Greybush, Nicholas J. and Kübel, Christian and Stein, Aaron and Murray, Christopher B. and Kagan, Cherie R.},
abstractNote = {In this paper, planar nanocrystal/bulk heterostructures are transformed into 3D architectures by taking advantage of the different chemical and mechanical properties of nanocrystal and bulk thin films. Nanocrystal/bulk heterostructures are fabricated via bottom-up assembly and top-down fabrication. The nanocrystals are capped by long ligands introduced in their synthesis, and therefore their surfaces are chemically addressable, and their assemblies are mechanically “soft,” in contrast to the bulk films. Chemical modification of the nanocrystal surface, exchanging the long ligands for more compact chemistries, triggers large volume shrinkage of the nanocrystal layer and drives bending of the nanocrystal/bulk heterostructures. Finally, exploiting the differential chemo-mechanical properties of nanocrystal and bulk materials, the scalable fabrication of designed 3D, cell-sized nanocrystal/bulk superstructures is demonstrated, which possess unique functions derived from nanocrystal building blocks.},
doi = {10.1002/adma.201800233},
journal = {Advanced Materials},
number = 22,
volume = 30,
place = {United States},
year = {2018},
month = {4}
}

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Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
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