Research - Nanomaterial Surfaces

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Measurement Standardization
Surface Dynamics
Organic Semiconductors
Nanomaterial Surfaces
2D Materials

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Dr. JeongWon Kim

Staff Scientist

Professor (UST)

Division of Industrial Metrology

Korea Research Institute of Standards & Science
267 Gajeong-Ro

Daejeon 34113

Republic of Korea

Phone
Fax:

+82-(0)42-868-5761

+82-(0)42-868-5032

In order to keep nanomaterials under dispersion and inject them into a living organism, their surface should be modified to have a certain functionality. Thus, the ligand exchange reaction on the nanomaterial surface and stability is one of the major concerns in nanomaterial characterization.

 

 Assessment of ligand binding on nanomaterial surface

Mercaptopropionic acid (MPA) is coated on a quantum dot surface. Micropattern from drop-cast on ITO surface and drying is imaged by XPS. Each core level shows areal distribution with a certain correlation each other. If two atoms are correlated together, they are probably bound each other. This approach is planned to proceed an inter-laboratory comparison for standardization of ligand binding assessment (in detail).


 

Quantification of Surface Functional Groups

The quantification of organic substance in any application is prime important. To qualify an nanomaterial in practical use, one has to know the actual amount of surface functional groups. Before doing the actual quantification, the density of an organic thin film is measured by XPS. Through the electron attenuation rule and standard reference such as graphite, vacuum-deposited organic thin film could be quantified. (in detail)

 

대전시 유성구 가정로 267 한국표준과학연구원 산업응용측정본부 나노구조측정센터

첨단인증동 (313) B-16, Tel. 042-868-5977

대전시 유성구 가정로 217 과학기술연합대학원대학교 나노계측과학과

 

File last modified: Mar. 28 2019