Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 1, Issue 6, Pages 1339-1346Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am900237d
Keywords
Langmuir-Blodgett; stamping; magnetic nanocrystals; iron platinum; magnetic force microscopy; magnetic memory
Funding
- Robert A. Welch Foundation
- Air Force Research Laboratory [FA8650-07-2-5061]
- National Science Foundation [DMR-0807065, DMR-0225180, DMR-0308575]
- Keck Foundation
- National Institute of Health/National Institute of General Medical Sciences
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0810119] Funding Source: National Science Foundation
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Patterned monolayers and multilayers of FePt nanocrystals were printed onto substrates by first assembling nanocrystals on a Langmuir-Blodgett (LB) trough and then lifting them onto prepatterned polydimethylsiloxane (PDMS) stamps, followed by transfer printing onto the substrate. Patterned features, including micrometer-size circles, lines, and squares, could be printed using this approach. The magnetic properties of the printed nanocrystal films were also measured using magnetic force microscopy (MFM). Room-temperature MFM could detect a remanent (permanent) magnetization from multilayer (>3 nanocrystals thick) films of chemically ordered L1(0) FePt nanocrystals.
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