9 research outputs found

    A Method Measuring Vapor Pressure of Liquid Using Syringe and Pressure Gauge from 25 โ„ƒ up to 80 โ„ƒ

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    ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํ•™๊ต ํ˜„์žฅ์—์„œ ๋ฌผ๊ณผ ์—ํƒ„์˜ฌ์˜ ์ฆ๊ธฐ์•• ์ธก์ •์„ ์œ„ํ•œ ์•ˆ์ „ํ•˜๊ณ  ๊ฐ„ํŽธํ•œ ์žฅ์น˜๋ฅผ ๊ฐœ๋ฐœํ•˜๊ณ  ์ด๋ฅผ ์ด์šฉํ•œ ์ฆ๊ธฐ์•• ์ธก์ • ๋ฐฉ๋ฒ•์„ ์—ฐ๊ตฌํ•˜์˜€๋‹ค. ์ฃผ์‚ฌ ๊ธฐ์™€ ๋ฒ”์šฉ ์••๋ ฅ๊ณ„๋ฅผ ํ™œ์šฉํ•˜์—ฌ ์ธก์ • ์žฅ์น˜๋ฅผ ๊ฐ„ํŽธํ•˜๊ฒŒ ๊ตฌ์„ฑํ•˜๊ณ , ์ฆ๊ธฐ์•• ์ธก์ • ์ „ ์ฃผ์‚ฌ๊ธฐ ๋‚ด๋ถ€๋ฅผ ๋‹จ์ผ๊ณ„๋กœ ๋งŒ๋“ค์–ด ์ฃผ๊ธฐ ์œ„ํ•ด ์ฃผ์‚ฌ๊ธฐ์™€ ์••๋ ฅ๊ณ„๋ฅผ ์—ฐ๊ฒฐํ•˜๋Š” ์—ฐ๊ฒฐ๊ด€ ์† ๊ณต๊ธฐ๋ฅผ ๋ชจ๋‘ ์ œ๊ฑฐํ•˜์—ฌ ์‹คํ—˜์˜ ์ •ํ™•์„ฑ์„ ๋†’์˜€๋‹ค. ์ด ์žฅ์น˜๋กœ 25 โ„ƒ์—์„œ 80 โ„ƒ ๋ฒ”์œ„์˜ ์˜จ๋„์—์„œ ๋ฌผ๊ณผ ์—ํƒ„์˜ฌ์˜ ์ฆ๊ธฐ์••์„ ์ธก์ •ํ•˜๊ณ  ๋ฌธํ—Œ๊ฐ’๊ณผ ๋น„๊ตํ•˜์—ฌ ์žฅ์น˜์˜ ์ •ํ™•์„ฑ์„ ๊ฒ€์ฆํ•˜์˜€๋‹ค. ๋ณธ ์‹คํ—˜ ์žฅ์น˜๋ฅผ ์ด์šฉํ•˜๋ฉด ํ•™์ƒ๋“ค์ด ์–ด๋ ค์›Œํ•˜๋Š” ๊ฐœ๋… ์ค‘ ํ•˜๋‚˜์ธ ์ฆ๊ธฐ์••์„ ์‰ฝ๊ณ  ์•ˆ์ „ํ•˜๊ฒŒ ๊ฐœ๋ณ„ ์‹คํ—˜ํ•  ์ˆ˜ ์žˆ์œผ๋ฏ€ ๋กœ ํ˜„์žฅ์—์„œ ๊ฐœ๋…ํ•™์Šต์— ๋งŽ์€ ๋„์›€์ด ๋  ๊ฒƒ์œผ๋กœ ๊ธฐ๋Œ€๋œ๋‹ค.OAIID:oai:osos.snu.ac.kr:snu2012-01/102/0000027849/3SEQ:3PERF_CD:SNU2012-01EVAL_ITEM_CD:102USER_ID:0000027849ADJUST_YN:NEMP_ID:A075905DEPT_CD:718CITE_RATE:0FILENAME:ํ˜„์žฅ๊ณผํ•™๊ต์œก6(3)-์ฆ๊ธฐ์••.pdfDEPT_NM:ํ™”ํ•™๊ต์œก๊ณผEMAIL:[email protected]_YN:NCONFIRM:

    Surface enhanced photochemistry of molecules adsorbed on silver colloid surfaces ์€ ์ฝœ๋กœ์ด๋“œ ํ‘œ๋ฉด์— ํก์ฐฉ๋œ ๋ถ„์ž์˜ ํ‘œ๋ฉด ์ฆ๊ฐ• ๊ด‘ํ™”ํ•™

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    Thesis (doctoral)--์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› :๊ณผํ•™๊ต์œก๊ณผ ํ™”ํ•™์ „๊ณต,1999.Docto

    ์€ ์ฝœ๋กœ์ด๋“œ ํ‘œ๋ฉด์— ํก์ฐฉ๋œ ๋ถ„์ž์˜ SERS ์—ฐ๊ตฌ

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    ํ•™์œ„๋…ผ๋ฌธ(์„์‚ฌ)--์„œ์šธๅคงๅญธๆ ก ๅคงๅญธ้™ข :็ง‘ๅญธๆ•Ž่‚ฒ็ง‘ ๅŒ–ๅญธๅฐˆๆ”ป,1995.Maste

    Analysis and Debelopment of Experimental Method of Charle's Law Applicable to School

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    ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ํ•™๊ต ํ˜„์žฅ์— ์ ์šฉ ๊ฐ€๋Šฅํ•œ ์ƒค๋ฅผ์˜ ๋ฒ•์น™ ์‹คํ—˜๋ฐฉ๋ฒ•์„ ๊ฐœ๋ฐœํ•˜์˜€๋‹ค. ๊ต๊ณผ์„œ ๋ฐ ๋ฌธํ—Œ๋ถ„์„์„ ํ†ตํ•˜์—ฌ ์‹คํ—˜ ์žฅ์น˜ ๋ฐ ๋ฐฉ๋ฒ•์„ ๊ตฌ์„ฑํ•˜๋Š”๋ฐ ํ•„์š”ํ•œ ์š”์†Œ๋ฅผ ๋ถ„์„ํ•˜์˜€๋‹ค. ์ „์ฒด ๋ถ€ํ”ผ๋ฅผ ๊ฒฐ์ •ํ•˜๋Š” ๋ถ€๋ถ„์œผ๋กœ ๋‹จ์ˆœ ๊ตฌ์กฐ์ธ ์ฃผ์‚ฌ๊ธฐ๋ฅผ ์‚ฌ์šฉํ•  ๋•Œ ๋ณด๋‹ค ๋ฐ”์ด์•Œ๊ณผ ๋ถ€ํ”ผ ๋ณ€ํ™”๋ฅผ ๊ด€์ฐฐํ•˜๋Š” ๋ถ€๋ถ„์œผ๋กœ ์œ ๋ฆฌ๊ด€์„ ์—ฐ๊ฒฐํ•œ ๊ตฌ์กฐ๋ฅผ ์‚ฌ์šฉํ•˜์˜€์„ ๋•Œ ์˜จ๋„ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ๊ธฐ์ฒด์˜ ๋ถ€ํ”ผ ๋ณ€ํ™”๋ฅผ ์‰ฝ๊ฒŒ ์ธก์ •ํ•  ์ˆ˜ ์žˆ์—ˆ๊ณ , ๋น„์ปค ๊ฐ™์€ ํฐ ๋ถ€ํ”ผ์˜ ๋ฌผ์ค‘ํƒ• ๊ธฐ๊ตฌ ๋ณด๋‹ค ๋ˆˆ๊ธˆ์‹ค๋ฆฐ๋”๋ฅผ ์ด์šฉํ•œ ๋ฌผ์ค‘ํƒ• ๋ฐฉ๋ฒ•์ด ๋ƒ‰๊ฐ ์‹œ๊ฐ„์— ์žˆ์–ด์„œ ์ด์ ์„ ๋ณด์—ฌ์ฃผ์—ˆ๋‹ค. ๋ถ€ํ”ผ๋ณ€ํ™” ๋ถ€๋ถ„์—์„œ ์ €ํ•ญ์ด ์ตœ์†Œํ™”๋œ ํ˜•ํƒœ๋กœ ์•ก์ฒด ๋งˆ๊ฐœ ํ˜•ํƒœ๊ฐ€ ์ด์šฉ๋˜์—ˆ๋‹ค. ์•ก์ฒด ๋งˆ๊ฐœ๋กœ ๋ฌผ๋ฐฉ์šธ์„ ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ ์ธก์ • ์ดˆ๋ฐ˜์— ์ฆ๋ฐœ์— ์˜ํ•ด ๊ธฐ์ฒด ๋ถ€ํ”ผ๋ณ€ํ™”์— ํฐ ์˜ํ–ฅ์„ ์ฃผ๋Š”๋ฐ, ๊ธ€๋ฆฌ์„ธ๋กค์„ ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ ์ด ๊ฐ™์€ ์˜ํ–ฅ์€ ๊ฑฐ์˜ ์—†์—ˆ๋‹ค. ์ œ์•ˆ๋œ ์‹คํ—˜๋ฐฉ๋ฒ•์œผ๋กœ ๋Œ€๋žต 1 ์‹œ๊ฐ„ ์ด๋‚ด์˜ ์‹คํ—˜ ์‹œ๊ฐ„์„ ์†Œ์š”ํ•˜์—ฌ ๋†’์€ ์„ ํ˜•์ƒ๊ด€๊ณ„์ˆ˜(R2= 0.999)๋ฅผ ๊ฐ–๋Š” ๊ฒฐ๊ณผ๋ฅผ ์–ป์„ ์ˆ˜ ์žˆ์—ˆ๊ณ , ๋ถ€ํ”ผ๊ฐ€ 0์ด ๋˜๋Š” ์˜จ๋„๊ฐ€ -216.7 oC๋กœ ์˜ˆ์ธก๋˜๋Š” ์ •๋„๋กœ ๋งค์šฐ ์ •ํ™•ํ•œ ๊ฒฐ๊ณผ๋ฅผ ๋ณด์—ฌ์ฃผ์—ˆ๋‹ค. ๋ณธ ์—ฐ๊ตฌ๋ฅผ ํ†ตํ•ด ๊ฐœ๋ฐœ๋œ ์ƒค๋ฅผ์˜ ๋ฒ•์น™ ์‹คํ—˜์€ ํ•™๊ต ๊ธ‰๋ณ„ ๊ต์œก๊ณผ์ •์— ๋”ฐ๋ผ ์ˆ˜์ค€์„ ์กฐ์ ˆํ•˜์—ฌ ์‹ค์‹œํ•  ์ˆ˜ ์žˆ์„ ๊ฒƒ์œผ๋กœ ์˜ˆ์ƒํ•œ๋‹ค. ; In this study, we developed an experimental method of the Charles' law applicable to school. Science textbooks and literatures on this principle were analyzed to extract factors utilized in organizing the experimental setup and method. A combined structure such as with a vial and a glass tube, the former of which is for deciding the total volume and the latter of which is for easy measurement of volume, was better in measurement of volume with temperature rather than a simple structure such as syringe. Use of graduated cylinder as a water bath to control the temperature showed advantage in cooling time than using other bath of larger volume such as a beaker. A liquid drop was used as a plug in the glass tube. This plug has little resistance with the glass wall when the gas volume changes. Water as a liquid drop in the glass tube had a significant effect in volume change of gas due to evaporation, especially in the beginning of the measurement. Glycerol showing negligible effect in volume change was used. This method took about one hour and produced a good linear relationship between the temperature and volume of gas with R2 = 0.999 and absolute zero temperature = -216.7โ„ƒ. The Charles' law experiment developed in this study can be performed with appropriate adjustment of procedure considering the purpose of the curriculum of science and chemistry subject at each school level.๋ณธ ์—ฐ๊ตฌ๋Š” ์ œ 2๋‹จ๊ณ„ ๋‘๋‡Œํ•œ๊ตญ21 ํ”„๋กœ๊ทธ๋žจ์˜ ์ง€์›์„ ๋ฐ›์•˜์Œ

    Strong optical coupling between mutually orthogonal plasmon oscillations in a silver nanosphere-nanowire joined system

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    A top-to-bottom joined system consisting of a silver nanowire and nanospheres was fabricated by embedding silver nanospheres on a glass or silicon substrate on which 3-aminothiophenol as an analyte molecule was adsorbed, and then placing silver nanowires on the substrate to make gap sites between a nanowire and nanospheres. In the far-field Raman measurements, the sphere under the wire exhibited more than 60 times higher Raman enhancement than isolated spheres. The surface enhanced Raman scattering (SERS) spectra obtained by the 647.1 nm excitation showed highly polarized feature, exhibiting ca. 4 times higher SERS intensity for the electric field parallel to the wire axis than that perpendicular to the wire axis while those by the 514.5 nm excitation showed non-polarized feature against the incident electric field direction. The polarized feature by the 647.1 nm excitation is explained in terms of optical coupling in a vertical direction to the substrate plane, between the silver nanosphere and the longitudinal surface plasmon mode of the nanowire. The longitudinal plasmon of the nanowire functions as an antenna of the incident radiation field in this type of coupled plasmon mode, to yield the confined field. Near-field two-photon excitation imaging measurements as well as numerical calculations of the localized electric field around the system support this idea and indicate that the coupling between the surface plasmon of silver nanospheres and the longitudinal mode of silver nanowires is site-selective.This work was supported by the Bio & Medical Technology Development Program (Grant No. 2012-0006077) and the Pioneer Research Center Program (Grant No. 2012-0000448) of the National Research Foundation (NRF) funded by the Ministry of Education, Science and Technology of Korea. The work at Japan was supported by Grants-in-Aid for Scientific Research (Grant No. 18205004, 18685003, 22655007, 22225002, 24655020, and 24350014) from the Japan Society for the Promotion of Science and that on Priority Area Strong Photon-Molecule Coupling Fields (Grant No. 19049015) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan and that from Research Foundation for Opto-Science and Technology and Inamori FoundationOAIID:oai:osos.snu.ac.kr:snu2013-01/102/0000027849/3SEQ:3PERF_CD:SNU2013-01EVAL_ITEM_CD:102USER_ID:0000027849ADJUST_YN:YEMP_ID:A075905DEPT_CD:718CITE_RATE:3.573FILENAME:์ฒจ๋ถ€๋œ ๋‚ด์—ญ์ด ์—†์Šต๋‹ˆ๋‹ค.DEPT_NM:ํ™”ํ•™๊ต์œก๊ณผEMAIL:[email protected]_YN:YCONFIRM:
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