期刊
JOURNAL OF THE ROYAL SOCIETY INTERFACE
卷 14, 期 135, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsif.2017.0464
关键词
off-axis electron holography; liquid cell TEM; magnetic nanoparticles; magnetotactic bacteria
资金
- US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
- Department of Energy Office of Science Early Career Research Award, Biomolecular Materials Program
- US Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division
- US Department of Energy [DE-AC02-07CH11358]
- European Research Council under the European Union [320832]
- European Research Council (ERC) [320832] Funding Source: European Research Council (ERC)
The mapping of electrostatic potentials and magnetic fields in liquids using electron holography has been considered to be unrealistic. Here, we show that hydrated cells of Magnetospirillum magneticum strain AMB-1 and assemblies of magnetic nanoparticles can be studied using off-axis electron holography in a fluid cell specimen holder within the transmission electron microscope. Considering that the holographic object and reference wave both pass through liquid, the recorded electron holograms show sufficient interference fringe contrast to permit reconstruction of the phase shift of the electron wave and mapping of the magnetic induction from bacterial magnetite nanocrystals. We assess the challenges of performing in situ magnetization reversal experiments using a fluid cell specimen holder, discuss approaches for improving spatial resolution and specimen stability, and outline future perspectives for studying scientific phenomena, ranging from interparticle interactions in liquids and electrical double layers at solid-liquid interfaces to biomineralization and the mapping of electrostatic potentials associated with protein aggregation and folding.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据