| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
B. 나노화학/바이오 재료 분과 |
| 제목 |
Terahertz Time-Domain Spectroscopy and Polarized VUV Spectroscopy of DNA-Based New Materials |
| 초록 |
We have studied the optical properties of DNA-based new materials in free-standing layer form and in aligned thin-film form. In order to obtain the complex refractive index (ñ), dielectric function (ϵ̃), and optical conductivity (σ̃) of free standing DNA layers, we performed terahertz time-domain spectroscopy (THz-TDS). In the low-frequency region from 3 to 40 cm-1, the refractive index ranges from 2 to 3, suggesting low reflection losses due to refractive index mismatch. The aligned DNA thin films were fabricated on quartz substrates by a brush technique. To analyze the absorption spectrum of such line-pattern DNA thin films depending on the aligned direction, we carried out optical polarimetry in the terahertz and visible UV regions. For the visible-UV spectroscopic analysis, the absorption feature at 260 nm, the π-π* transition, is largely affected by the polarization of light relative to the aligned direction of DNA. Our results show that a joint set of spectroscopic tools are useful probes to characterized DNA-based materials. |
| 저자 |
김재훈1, 하태우1, Bramaramba Gnapareddy2, Sreekantha Reddy Dugasani2, Bjorn Paulson1, Si Joon Kim1, Keun Woo Lee2, Tae Soo Jung1, 김현재1, 오경환1, 박성하2
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| 소속 |
1연세대, 2성균관대 |
| 키워드 |
freestanding pure DNA; Terahertz time domain spectroscopy; spectrophotometry; polarmetry; pi-pi* transition; optical constant
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| E-Mail |
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