奈米銀化CD-R基板在表面增強拉曼散射(SERS)上之研究與應用

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dc.contributor林震煌zh_TW
dc.contributorLin, Chen-Huangen_US
dc.contributor.author駱亮安zh_TW
dc.contributor.authorLuo, Liang-Anen_US
dc.date.accessioned2019-09-04T09:07:00Z
dc.date.available不公開
dc.date.available2019-09-04T09:07:00Z
dc.date.issued2016
dc.description.abstract一般拉曼光譜儀搭配顯微鏡會使用載玻片作為樣品基板，然而樣品乾燥在基板上時，樣品會出現咖啡環效應，使得樣品分佈不均勻，尤其在偵測低濃度樣品時，會讓實驗更為困難，因此本研究試圖使用CD-R作為基板，並搭配奈米粒子作表面增強拉曼散射(SERS)，解決樣品分佈不均及難以測得低濃度的問題。 本研究使用具有疏水性表面的CD-R作為表面增強拉曼光譜的基板。去除紀錄層和保護層以後，以SEM (scanning electron microscope)發現CD-R的表面具有微陣列結構，每一個陣列縫隙約為341 nm。滴約直徑2 mm大小的液珠在CD-R和載玻片上，以接觸角儀測出CD-R接觸角為84°，載玻片的接觸角為20°，此顯示出CD-R提供較高的疏水性表面，為使用CD-R基板可以減少咖啡環效應的原因。 預混合NH2OH · HCl (1.67 × 10-3 M/90 mL) 和NaOH (0.519 M/0.577 mL)，在2000 rpm的轉速攪拌下，加入0.01 M AgNO3 10 mL，持續攪拌4.5分鐘後完成土黃色的奈米銀膠體溶液。 在CD-R滴奈米銀膠體溶液自然乾燥後，奈米銀粒子可以推積在微陣列縫隙中，奈米銀膠體溶液的UV-Vis的吸收在406 nm，奈米銀粒子大小約20 nm，這種奈米銀粒子大小在雷射照射下，可以感應出表面電漿共振。為了評估奈米銀CD-R基板的表現性，對-胺基苯硫酚 (4-ATP)和孔雀石綠(MG)選作測試樣品，p-ATP上的硫原子易和奈米銀粒子鍵結，此共價鍵會讓C-S的能量下降，造成1089 cm-1 (拉曼訊號) 偏移至1077 cm-1 (SERS訊號)，估算出的增強因子為3×〖10〗^6。zh_TW
dc.description.abstractWith a high hydrophobic surface, CD-R was selected as the substrate of SERS (Surface Enhanced Raman Scattering) in this study. After removing the recording and protective layers, it was found that the surface of the CD-R was constructed with microarray structures; the width between each microarray was approximately 341 nm, observed by SEM (scanning electron microscope). By using a contact angle-meter, to a drop of water (diameter of 2 mm), the contact angles of the CD-R and a regular glass slide were found to 84° and 20°, respectively. It reveals that the CD-R substrate provides higher hydrophobic feature than glass slide. This is also the reason for why the use of CD-R substrate can avoid coffee ring effect. Nano-silver colloid solution was prepared by pre-mixing NH2OH · HCl (1.67 × 10-3 M/90 mL) and NaOH (0.519 M/0.577 mL). After vigorous stirring at speed 2000 rpm, 0.01 M AgNO3 10 mL was added to the above solution and continue stirring in 4.5 minutes. After this, a wheat nano-silver colloid Solution was completed. When a drop of nano-silver colloid solution was dropped on the CD-R substrate, it would be spontaneously dried, and then the nano-silver particles can be uniformly deposited on the surface, leading to make silver-CD-R substrate. The wavelength of maximum absorbance was 406 nm. The sizes of the nano-silver particles on CD-R were about 20 nm, which size was useful to induce a surface plasma resonance when a laser was used. In order to evaluate the performance of the silver/CD-R substrate, 4-ATP (p-aminothiophenol) was selected as the test sample. The findings show that the sulfur atom was easy to bond with nano-silver particles. We found that a covalent bond might be formed between the sulfur atom and nano-silver particles, and as a result, the energy of C-S bond was decreased, since the energy of a C-S bond was decreased from 1088 cm-1 (Raman signal) to 1077 cm-1 (SERS signal). Based on this signal, a 3000 fold enhancement factor was calculated.en_US
dc.description.sponsorship化學系zh_TW
dc.identifierG060342030S
dc.identifier.urihttp://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22G060342030S%22.&%22.id.&
dc.identifier.urihttp://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/100043
dc.language中文
dc.subject咖啡環效應zh_TW
dc.subject奈米粒子zh_TW
dc.subject表面增強拉曼散射zh_TW
dc.subjectcoffee ring effecten_US
dc.subjectnanoparticlesen_US
dc.subjectsurface-enhanced Raman Scatteringen_US
dc.title奈米銀化CD-R基板在表面增強拉曼散射(SERS)上之研究與應用zh_TW
dc.titleThe Study and Application of Nanosilver/CD-R Substrate in Surface-Enhanced Raman Scattering (SERS)en_US

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