New Physics: Sae Mulli

Aims and Scope

The origin of New Physics: Sae Mulli (NPSM, ISO abbreviation: New Phys.: Sae Mulli.): Sae Mulli (새물리 in Korean characters means ‘new physics’) is the oldest Korean pure scientific journal. It was first published in 1961 just after the Korean War by the Korean Physical Society (KPS). The primary mission of Sae Mulli was to start building up Korean physics research community from almost nothing and in fact Sae Mulli had made tremendous contributions to the Korean science community. Through a peer-review system, Sae Mulli had continued elevating the level of scientific researches, consequently becoming a cornerstone of the economic miracle of Korea...

Editor-in-Chief : Sunglae CHO
New Physics: Sae Mulli Editorial Board

pISSN : 0374-4914
eISSN : 2289-0041

Tel : +82-2-556-4737
Fax : +82-2-554-1643
E-mail: npsm@npsm-kps.org

Research Papers

Effect of Thermal Annealing on the Far Infrared Transmittance of a Silver Hole Array

Hyunbin PARK, Ha Sul KIM*

Department of Physics, Chonnam National University, Kwangju 61110, Korea

We fabricated an infrared plamonic device with a thickness of 50~nm, a hole pitch of 5.5~$\mu$m and a hole size of 3~$\mu$m. An x-ray diffraction (XRD) analysis confirmed the formation of silver oxide (AgO$_2$) after heat treatment at 400 $^\circ$C by using a rapid thermal processor. After the heat treatments the maximum transmittance of the plasmonic device was partially decreased, and wavelength of the maximum transmittance peak was shifted from 17~$\mu$m to 17.4~$\mu$m. In addition, the full width at half maximum increased from 2~$\mu$m to 5.4~$\mu$m. However, the overall spectral roughly doubled excluding the peak wavelength region transmittance. We consider this to be due to the change in the refractive index of the plasmonic device caused by the formation of silver oxide on the deposited silver. Therefore, the transmission wavelength band of the plasmonic device can be easily adjusted through a heat treatment method.

New Phys.: Sae Mulli 2019; 69: 760-765

SERS-Based Sandwich Immunoassay for Alzheimer’s Disease Biomarker Detection Using Antibody Conjugated Magnetic Nanoparticles

Seong Jin BACK, Gyeong Bok JUNG*

Department of Physics Education, Chosun University, Gwangju 61452, Korea

Surface-enhanced Raman scattering (SERS)-based immunoassays have been developed for fast and ultrasensitive detection of biomarkers. In this study, we report a SERS-based sandwich immunoassay for the detection of the Alzheimer’s disease biomarker amyloid$\beta$(A$\beta$). A method combining magnetic separation and SERS was developed to detection of A$\beta$. Gold-coated magnetic nanoparticles (Fe$_3$O$_4$@Au MNPs) were prepared by immobilizing anti-A$\beta$ antibodies and was used in the separation and the concentration of the A$\beta$. Gold nanoparticles (Au NPs) were modified with detection antibodies, and antibody-conjugated Au NPs were labeled with 3, 3, diethylthia-tricarbocyanine iodide (DTTC), as the SERS probes. The correlation between the A$\beta$ concentration and the SERS signal was found to be linear within the range from 1 fM to 1 $\mu$M. As a result, we were able to detect A$\beta$ with a much lower limit of 1 fM. This technique allows for straightforward SERS-based bioassays for the quantitative detection of biomarkers and has potential for clinical applications.

New Phys.: Sae Mulli 2019; 69: 690-694

New Phys.: Sae Mulli 2019; 69: 679~786

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Research Papers

Investigation of Broadband High-Brightness Quantum-Dot Structures by using Numerical Simulations

Yudong JANG, Donghan LEE*

New Phys.: Sae Mulli 2019; 69: 679-684 https://doi.org/10.3938/NPSM.69.679