Development of an apparatus for near-field Raman spectroscopy under transmission electron microscopy toward the degradation analyses of lithium ion battery

2015 Fiscal Year Final Research Report

• Project/Area Number: 26600038
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials engineering
• Research Institution: Tohoku University
• Principal Investigator: OHNO YUTAKA 東北大学, 金属材料研究所, 准教授 (80243129)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 透過電子顕微鏡内その場分光 / ラマン分光 / 散乱型近接場光 / リチウムイオン電池

Outline of Final Research Achievements

An intense laser probe about 10 micrometer in diameter was formed on a specimen under transmission electron microscopy (TEM). With the light probe, micro-Raman spectroscopy under TEM, with a spatial resolution of the order of 10 micrometer simultaneously with an energy resolution of 6 meV, was demonstrated.
A metal tip covered with silver nanoparticles (60 nanometer in diameter) was placed on an arbitrary position in the above-mentioned laser probe, and a near-field light was induced at the apex by a tip-enhanced effect. However, the intensity of the near-field light was too low to demonstrate near-field Raman spectroscopy under TEM with a spatial resolution of 60 nanometer.

Free Research Field

ナノ構造物性