シ ス テム・オ プ ション 分光測定
ハミングバードの液体導入用ホルダーは、液体セル内の分光測定用にエネルギー分散型X線分光器（EDS）機能を搭載しています。当社の特殊なチップは、液体層を可能な限り薄くし、液体セル内での電子エネルギー損失分光法（EELS）を可能にします。これにより、高倍率での元素分析、およびマッピングを直接行うことができます。EDS液体セルホルダーの大きな視野角は、試料からEDS検出器への直接アクセスが可能です。（複数の検出器構成でも可能）
Researchers from Brookhaven National Laboratory (BNL) have used Hummingbird liquid cell TEM platform optimized for EDS to capture for the first time the experimental evidence of growth of Ag nanocystals in liquid solution. The researchers used TEM fluid cells to assemble Ag nanoparticles attached to the Pt bar in liquid solution. Using super four-quadrant EDS detector installed in FEI Talos at BNL, they used STEM-EDS mapping to track Ag and Pt distributions in continuous liquid flow, and observed two variation of growth modes depending on the beam interaction and catalytic activity of the Pt. This study can have a huge impact in the control synthesis and growth of many other nanocrystals. The work also advances the opportunity for performing spectroscopic imaging in liquid TEM.
Reference: Huolin Xin et al. Anomalous Growth Rate of Ag Nanocrystals Revealed by in situ STEM. Scientific Reports (2017). Abstract
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