Nanodiamonds That Swim
| Autor: | Hyeon-Ho Jeong, Ji Tae Kim, Udit Choudhury, Peer Fischer |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Light Nitrogen Mechanical Engineering Temperature Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Magnetic field Nanodiamonds Temperature gradient Motion Mechanics of Materials Quantum dot Vacancy defect General Materials Science 0210 nano-technology Nanodiamond Nitrogen-vacancy center Quantum |
| Zdroj: | Advanced Materials |
| ISSN: | 1521-4095 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text