發(fā)布時(shí)間：2018-04-02 01:06

  本文選題：稀土發(fā)光材料　切入點(diǎn)：銀納米顆粒　出處：《青島科技大學(xué)》2015年碩士論文

【摘要】：熒光納米材料具有優(yōu)越的發(fā)光性能,廣泛應(yīng)用于照明設(shè)備、顯示器、生物標(biāo)記、顯微成像、醫(yī)學(xué)研究以及臨床診斷等領(lǐng)域。銀(Ag)納米顆粒表面等離子體共振具有光定位、強(qiáng)吸收以及強(qiáng)局域場(chǎng)等優(yōu)點(diǎn),廣泛應(yīng)用于表面增強(qiáng)拉曼散射(SERS)和金屬增強(qiáng)熒光(MEF)等相關(guān)領(lǐng)域,其與熒光材料復(fù)合而成的納米結(jié)構(gòu)具有優(yōu)異的光學(xué)性能以及高穩(wěn)定性。本文制備了銀核殼納米顆粒和銀納米顆粒自組裝薄膜,研究了其表面等離子體共振對(duì)熒光材料發(fā)光性能的影響。對(duì)金屬表面等離子體共振增強(qiáng)熒光(MEF)的應(yīng)用展開(kāi)了初步探索。主要分為以下三部分內(nèi)容：1.采用沉淀法和水熱法合成了Tb3+和Eu3+摻雜的LaF3納米顆粒,通過(guò)TEM、 XRD、FTIR和熒光光譜測(cè)試等分析方法,分別研究了摻雜濃度、反應(yīng)時(shí)間、穩(wěn)定劑以及pH值對(duì)熒光性能的影響。2.研究Ag納米顆粒等離子體共振對(duì)于LaF3:Tb3+/Eu3+納米材料熒光性能的影響。設(shè)計(jì)Ag@SiO2@LaF3:Tb3+/Eu3+核殼納米顆粒和LaF3:Tb3+/PVA/Ag薄膜兩種結(jié)構(gòu),分別通過(guò)改變Si02隔層厚度和PVA濃度來(lái)控制Ag納米顆粒與LaF3: Tb3+/Eu3+熒光材料之間的距離,討論了熒光增強(qiáng)與猝滅兩種機(jī)理。3.設(shè)計(jì)合成Ag@SiO2-DNA-Cy3熒光探針,討論了SiO2隔層厚度對(duì)熒光性能的影響。利用這種熒光探針實(shí)現(xiàn)了對(duì)Hg2+的檢測(cè)。結(jié)果顯示此熒光探針具有良好的靈敏性和選擇性。
[Abstract]:Fluorescent nanomaterials have excellent luminescence properties and are widely used in lighting devices, displays, biomarkers, microscopic imaging, medical research and clinical diagnosis.Surface plasmon resonance (SPR) of silver silver nanoparticles has been widely used in many related fields such as surface enhanced Raman scattering (SERS) and metal enhanced fluorescence (MEF) due to the advantages of light localization, strong absorption and strong local field.The nanostructures synthesized with fluorescent materials have excellent optical properties and high stability.Silver core-shell nanoparticles and silver nanoparticles self-assembled thin films were prepared in this paper. The effect of surface plasmon resonance (SPR) on the luminescence properties of fluorescent materials was investigated.The application of metal surface plasmon resonance enhanced fluorescence (MEF) was preliminarily explored.It is divided into the following three parts: 1.LaF3 nanoparticles doped with Tb3 and Eu3 were synthesized by precipitation and hydrothermal methods. The effects of doping concentration, reaction time, stabilizer and pH value on the fluorescence properties were studied by means of TEM, XRDX FTIR and fluorescence spectroscopy.The effect of plasma resonance (PSR) of Ag nanoparticles on the fluorescence properties of LaF3:Tb3 / EU3 nanomaterials was investigated.The structure of Ag@SiO2@LaF3:Tb3 / EU3 core-shell nanoparticles and LaF3:Tb3 / PVA / Ag films were designed. The distance between Ag nanoparticles and LaF3: Tb3 / EU3 fluorescent materials was controlled by changing the thickness of Si02 interlayer and the concentration of PVA, respectively. The fluorescence enhancement and quenching mechanisms were discussed.Ag@SiO2-DNA-Cy3 fluorescence probe was designed and synthesized, and the influence of the thickness of SiO2 interlayer on the fluorescence performance was discussed.The fluorescence probe was used to detect Hg2.The results show that the fluorescence probe has good sensitivity and selectivity.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB383.1;O614.122

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本文編號(hào)：1698093