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Prof. Lee Jihoon’s Research Team (Department of Electronic Engineering) Develops a Dual Hybrid...

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  • 2021-11-18
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Professor Lee Jihoon’s Research Team (Department of Electronic Engineering) Develops a Dual Hybrid Surface-Enhanced Raman Spectroscopy (SERS) System

 

Professor Lee Jihoon's research team (Department of Electronic Engineering) at the university succeeded in developing a dual surface-enhanced Raman spectroscopy (SERS) system by applying meta surface core-shell gold-platinum hybrid nanoparticles together with Ph. The hybrid surface-enhanced SERS platform was developed in the form of integrating molybdenum disulfate (MoS2) nanoparticles into core-shell gold-platinum hybrid nanoparticles (HNPs) to enhance molecular Raman vibrations of crystal violet (CV).

 

It provides a high-density background AuNP and a high-concentration electromagnetic hotspot of a core-shell AuPt HNP with a unique structure. Core-shell gold-platinum hybrid nanoparticles were prepared by a unique dual-step solid-state wetting method, while molybdenum disulfate nanoparticles provided sufficient charge transfer to a rich active site.

 

Surface-enhanced Raman spectroscopy (SERS) is an excellent analysis/sensing technology that recognizes and detects molecules and substances even at extremely low molecular concentrations. Surface-enhanced Raman spectroscopy is an advanced analytical technique that can significantly improve the very weak Raman signal of an analyte and is widely used in various research fields such as biosensors, clinical diagnosis, chemical species identification, environmental monitoring, and food safety.

 

Surface-enhanced Raman spectroscopy is an ultrafine analysis/sensing technique that enhances Raman scattering by plasmonic nanostructures and materials. The advantage of surface-enhanced Raman spectroscopy is that it can measure regardless of the state of the sample (solid, liquid, gas), and also can measure a very small amount of virus without pre-treatment of the sample to be measured. In addition, surface-enhanced Raman spectroscopy is a non-destructive measurement method, and even if the measured sample is re-measured several times, it does not affect the sample. The enhancement factor of surface-enhanced Raman spectroscopy is theoretically possible up to 1011, which means that a single molecule can be sensed. Usually, the sensitivity of the Bayer sensor is at least several thousand/tens of thousands of molecules, which means that a biosensor based on surface-enhanced Raman spectroscopy can have a sensitivity of several thousand times or more.

 

Photo Description: Dual-hybrid surface-enhanced Raman spectroscopy (SERS) applied with core-shell AuPt hybrid nanoparticles (HNP): core-shell HNP preparation, electromagnetic field distribution, SERS schematic and spectrum

 

 

The researchers of this study are Rutuja Mandavkar (Ph.D. program, Kwangwoon University - first author), Shusen Lin (Master's Program, Kwangwoon University), Rakesh Kulkarni (Ph.D. program, Kwangwoon University), Sanchaya Pandit (Master's program, Kwangwoon University), Shalmali Burse (Ph. Course, Kwangwoon University), Md Ahasan Habib (Ph.D., Kwangwoon University), Puran Pandey (Ph.D., Kwangwoon University), Sundar Kunwar (Ph.D., Kwangwoon University), Lee Jihoon (Professor, Kwangwoon University-corresponding author). .

 

Rutuja Mandavkar entered Kwangwoon University as a Ph.D. in Electronics in 2020, and is currently a researcher in the second year of the Ph.D. To date, she has been involved in a number of joint studies and has published her co-author papers. She said, “After entering Kwangwoon University, I am very happy that the first author’s thesis was published in an excellent journal in the process of concentrating on my studies. I want to continue my research.”

 

Meanwhile, this research was carried out with the support of the National Research Foundation of Korea and the Ministry of Education, BK-21, key research institutes, and support for middle-level researchers and Kwangwoon University. Top 3.75% (3rd place in category) Q1 METALLURGY & METALLURGICAL ENGINEERING) “Dual-Step hybrid SERS scheme through the blending of CV and MoS2 NPs on the AuPt core-shell hybrid NPs” in the online edition of October 6, 2021 published in the title.

 

* Web link: https://doi.org/10.1016/j.jmst.2021.08.022