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Nanodiamonds That Swim




Nanodiamonds are emerging as nanoscale quantum probes for bio-sensing and imaging. This necessitates the development of new methods to accurately manipulate their position and orientation in aqueous solutions. The realization of an “active” nanodiamond (ND) swimmer in fluids, composed of a ND crystal containing nitrogen vacancy centers and a light-driven self-thermophoretic micromotor, is reported. The swimmer is propelled by a local temperature gradient created by laser illumination on its metal-coated side. Its locomotion—from translational to rotational motion—is successfully controlled by shape-dependent hydrodynamic interactions. The precise engineering of the swimmer's geometry is achieved by self-assembly combined with physical vapor shadow growth. The optical addressability of the suspended ND swimmers is demonstrated by observing the electron spin resonance in the presence of magnetic fields. Active motion at the nanoscale enables new sensing capabilities combined with active transport including, potentially, in living organisms.

Author(s): Kim, Ji Tae and Choudhury, Udit and Hyeon-Ho, Jeong and Fischer, Peer
Journal: Advanced Materials
Volume: 29
Number (issue): 30
Pages: 1701024
Year: 2017
Month: June
Day: 12

Department(s): Micro, Nano, and Molecular Systems
Bibtex Type: Article (article)

DOI: 10.1002/adma.201701024
Note: Back Cover
State: Published
URL: http://dx.doi.org/10.1002/adma.201701024


  title = {Nanodiamonds That Swim},
  author = {Kim, Ji Tae and Choudhury, Udit and Hyeon-Ho, Jeong and Fischer, Peer},
  journal = {Advanced Materials},
  volume = {29},
  number = {30},
  pages = {1701024},
  month = jun,
  year = {2017},
  note = {Back Cover},
  url = {http://dx.doi.org/10.1002/adma.201701024},
  month_numeric = {6}