發(fā)布時間：2018-06-20 05:57

  本文選題：SERS + SHINERS��； 參考：《遼寧大學》2017年碩士論文

【摘要】：表面增強拉曼散射(SERS)光譜成為主要檢測單分子科學的種重要的手段,獲取分子的結構信息,從而發(fā)展成為一種重要的表面分析方法。從SERS光譜的電磁增強機理看出,選取合適的納米材料作為SERS基底是影響SERS光譜信號因素之一。尤其近年來,殼層隔絕納米粒子增強拉曼光譜(SHINERS)日漸成為人們關注的焦點,其主要優(yōu)點在于SHINERS的普適性,如將惰性殼層——碳層包覆在Ag納米粒子上,可用于多種SHINERS分析。目前該技術主要在材料科學、環(huán)境監(jiān)測、食品安全、生命科學等方面廣泛應用。本文主要是合成并表征SiO2@Ag和SiO2@Ag@C納米材料在拉曼光譜中的研究。首先圍繞SiO2@Ag這一接觸式的SERS基底的制備及表面單分子拉曼信號的檢測,并比較SiO2@Ag和銀鏡納米粒子對于表面單分子拉曼增強信號的差異。其次,本文制備了以碳層為殼的隔絕納米粒子,并進行表面檢測單分子的SHINERS研究。SHINERS提高了基底的穩(wěn)定性、普適性、可循環(huán)利用性。我們主要針對4-巰基苯甲酸(4-MBA)、對巰基苯胺(PATP)、對-硝基苯硫酚(PNTP)、羅丹明B、結晶紫物質(zhì)進行了表面檢測。新型SERS或SHINERS基底的構建是目前重要的研究領域,本文主要研究一種新型復合納米材料SHINERS基底的制備及其在拉曼光譜中的應用分析。獲取檢測單分子拉曼增強信號、研制新型納米結構的SERS和SHINERS基底、熱點、光譜穩(wěn)定性與普適性對于拉曼信號增強具有積極意義,為SERS和SHINERS基底技術提供了新型的方式方法。
[Abstract]:Surface enhanced Raman scattering (SERS) spectroscopy has become an important means to detect the science of single molecule. It is an important surface analysis method to obtain molecular structure information. From the electromagnetic enhancement mechanism of the SERS spectrum, the selection of suitable nano materials as the base of SERS is one of the factors affecting the SERS spectral signal. In recent years, shell isolation nanoparticle enhanced Raman spectroscopy (SHINERS) has become the focus of attention. Its main advantage is the universality of SHINERS, such as coating inert shell carbon layer on Ag nanoparticles, and can be used for various SHINERS analysis. The technology is mainly in material science, environmental monitoring, food safety and life science. This paper mainly synthesizes and characterizes the Raman spectra of SiO2@Ag and SiO2@Ag@C nanomaterials in the Raman spectrum. Firstly, the preparation of the contact type SERS substrate and the detection of the single molecule Raman signal on the surface of SiO2@Ag, and compare the difference between the SiO2@Ag and the silver mirror nanoparticles on the surface single molecule Raman enhancement signal. In this paper, we prepared the isolated nanoparticles with the carbon layer as the shell, and carried out the SHINERS study of the surface detection monomolecular.SHINERS to improve the stability, universality and recyclability of the substrate. We mainly focused on the surface detection of 4- mercapto benzoic acid (4-MBA), mercapto aniline (PATP), - nitrobenzene thiol (PNTP), Luo Danming B, crystal violet. Measurement. The construction of a new type of SERS or SHINERS substrate is an important research field at present. This paper mainly studies the preparation of a new type of composite nanomaterial SHINERS substrate and its application in the Raman spectrum. To obtain the Raman enhancement signal for detection of single molecule, to develop the SERS and SHINERS substrates of the new nanostructures, the hot spots, the spectral stability and the universality. It has positive significance for Raman signal enhancement, and provides a new way for SERS and SHINERS substrate technology.
【學位授予單位】：遼寧大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O657.37;TB383.1

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