本文選題：Ag納米粒子　切入點：Ag/BSA核殼結構納米粒子　出處：《廣東工業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：表面熒光增強效應被廣泛地應用于生物大分子檢測、材料分析和環(huán)境檢測等各個領域,因此制備具有良好的表面熒光增強效應的基體成為了近年來的熱門研究方向。本論文以硝酸銀為氧化劑,檸檬酸鈉為還原劑,采用氧化還原法制備了球形銀納米粒子,采用掃描電子顯微鏡分析其形貌及單分散性。在Ag納米粒子基礎上采用沉積自組裝法合成了Ag/BSA核殼結構納米粒子,結合SEM、透射電子顯微鏡和X射線衍射對其進行表征分析。分別研究了Ag納米粒子和Ag/BSA核殼結構納米粒子對聚苯乙烯的熒光增強效應并進行比較分析。實驗結果表明,最佳的反應時間為5min,制備的Ag納米粒子粒徑處于50-65nm,加入不同量的BSA得到了有效粒徑為80.8nm和100.6mnm兩種尺寸的Ag/BSA核殼結構納米粒子。Ag納米粒子和Ag/BSA核殼結構納米粒子都呈現(xiàn)球狀,單分散性良好,而且BSA有效地包覆在Ag納米粒子的外層。紫外吸收光譜結果表明,BSA的引入導致了Ag納米粒子表面的電子密度發(fā)生變化以及納米顆粒粒徑增大,從而引起了等離子共振吸收峰的紅移現(xiàn)象。熒光發(fā)射光譜結果表明,Ag納米粒子能使PS得熒光強度有所增強,而Ag/BSA核殼結構納米粒子使得PS的熒光強度從100增強到6000,說明了BSA隔離層對位于Ag表面附近的PS分子的熒光強度有顯著的增強效應。
[Abstract]:Surface fluorescence enhancement has been widely used in many fields, such as biomolecules detection, material analysis and environmental detection, etc. In this paper, silver nanoparticles were prepared by redox method with silver nitrate as oxidant and sodium citrate as reducing agent. The morphology and monodispersity of Ag nanoparticles were analyzed by scanning electron microscope (SEM). Ag/BSA core-shell structure nanoparticles were synthesized by deposition self-assembly method on the basis of Ag nanoparticles. The fluorescence enhancement effects of Ag nanoparticles and Ag/BSA core-shell structure nanoparticles on polystyrene were studied and compared. The best reaction time is 5 min, the particle size of Ag nanoparticles is 50-65 nm, and the effective size of Ag/BSA core-shell structure nanoparticles. Ag nanoparticles and Ag/BSA core-shell structure nanoparticles are spherical by adding different amount of BSA, the effective particle sizes are 80.8nm and 100.6mnm, respectively. BSA was effectively coated on the outer layer of Ag nanoparticles. The UV absorption spectra showed that the introduction of BSA resulted in the change of electron density on the surface of Ag nanoparticles and the increase of particle size. As a result, the red shift of the plasmon resonance absorption peak was induced. The fluorescence emission spectra showed that the fluorescence intensity of PS was enhanced by Ag nanoparticles. However, the fluorescence intensity of PS increased from 100 to 6000 by Ag/BSA core-shell structure nanoparticles, which indicates that the BSA isolation layer has a significant enhancement effect on the fluorescence intensity of PS molecules located near the Ag surface.
【學位授予單位】：廣東工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：O614.122;TB383.1

【相似文獻】

相關期刊論文 前10條

1 邵克讓;李建嬌;安興才;雷自強;蘇碧桃;;Ag~+/Ag/ZnO多孔納米結構纖維材料的制備及可見光催化性能[J];高等學�；瘜W學報;2014年07期

2 李新發(fā);趙華俊;曾啟華;;三維Y(Ⅲ)-Ag(Ⅰ)異金屬配位聚合物的合成、晶體結構與性質研究[J];無機化學學報;2012年09期

3 孫磊,張治軍,黨鴻辛;油溶性Ag納米微粒的制備及表征[J];化學物理學報;2004年05期

4 王德強;陳瑋;程繼健;;新型硫鹵玻璃GeS_2-Ga_2S_3-AgX(X=Cl,Br,I)中的K~+-Ag~+離子交換[J];硅酸鹽通報;2006年06期

5 盧立義,程遠琳,顧國耀,翁漪;Ag/α-Al_2O_3催化劑的熱分解過程研究[J];石油化工;2003年09期

6 張奇龍;席曉嵐;徐紅;;一維鏈狀Ag(Ⅰ)席夫堿配合物的合成和結構表征[J];分子科學學報;2012年01期

7 封滿良,章竹君,張新榮;增強化學發(fā)光免疫分析法測定血清中的乙型肝炎表面抗原(HBs·Ag)[J];云南大學學報(自然科學版);1993年S1期

8 李立冬,秦大斌,吳玉芹,陳志;9,10-二(2-亞甲基-硫-亞甲基-6-氯吡啶)蒽的合成及其對Ag~+的識別[J];西華師范大學學報(自然科學版);2005年01期

9 黃蘭萍,鄭子樵;微量Ag、Mg在2197合金中的合金化作用[J];金屬熱處理;2005年04期

10 宋e，

本文編號：1585344