Liquid System Spectroscopy

TEM Liquid Holder Spectroscopy Tip

Hummingbird Scientific’s liquid TEM holder includes an energy-dispersive X-ray spectroscopy (EDS) option for spectroscopic measurement. Our specialized chips ensure the thinnest possible liquid layer, allowing for electron energy loss spectroscopy (EELS) inside the liquid cell.  This in turn allows researchers to perform direct elemental analysis and mapping at high magnifications. The EDS liquid-cell holder’s large viewing angle ensures direct access from the sample to the EDS detector.

Featured Research

EDS mapping of Ag growth using a liquid STEM cell. Image copyright ©2017 Macmillan Publishers Limited, part of Springer Nature
EDS mapping of Ag growth using a liquid STEM cell. Image copyright ©2017 Macmillan Publishers Limited, part of Springer Nature

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

Liquid Spectroscopy Selected Publications

R. R. Unocic, L. Baggetto, G. M. Veith, J. A. Aguiar, K. A. Unocic, R. L. Sacci, N. J. Dudneyb and K. L. Morea. “Probing battery chemistry with liquid cell electron energy loss spectroscopy,” Chem. Commun. Advance Article (2015) Abstract
R.R. Unocic, L. Baggetto, K.A. Unocic, G.M. Veith, N.J. Dudney, and K.L. More. “Coupling EELS/EFTEM Imaging with Environmental Fluid Cell Microscopy.” Microscopy and Microanalysis 18 (Suppl 2), (2012) 1104-1105 Abstract
K.L. Jungjohann, J.E. Evans, J.A Aguiar , I. Arslan, N.D. Browning. “Atomic-scale imaging and spectroscopy for in-situ liquid scanning transmission electron microscopy.” Microscopy & Microanalysis 18:03 (2012) pp. 621–627. Abstract
K.L. Jungjohann, J.E. Evans, I. Arslan, N.D. Browning. “Electron Energy Loss Spectroscopy for Aqueous in-Situ Scanning Transmission Electron Microscopy.” Microscopy & Microanaysis 17:S2 (2011) pp. 778–779. Abstract


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