河南科学
河南科學
하남과학
Henan Science
2015年
10期
1732-1735
,共4页
Au-Ag合金纳米颗粒%Ag@Au纳米颗粒
Au-Ag閤金納米顆粒%Ag@Au納米顆粒
Au-Ag합금납미과립%Ag@Au납미과립
Ag-Au alloy nanoparticles%Ag@Au nanoparticles
通过改进的Frens法,制备出含金量不同的Au-Ag合金纳米颗粒和Ag@Au纳米颗粒. 通过测试,UV-Vis光谱结果表明,Au-Ag合金纳米颗粒只有一个介于Au、Ag峰值之间的等离子体共振峰;且峰值与金的摩尔分数呈线性关系. SEM、TEM结果表明Ag@Au纳米颗粒有约为13 nm的壳层;而Au-Ag合金纳米颗粒没有核壳结构,说明是合金,并且随着Au-Ag合金中Au的成分的逐渐增加,粒径趋于均匀、形貌趋于稳定的类球型.
通過改進的Frens法,製備齣含金量不同的Au-Ag閤金納米顆粒和Ag@Au納米顆粒. 通過測試,UV-Vis光譜結果錶明,Au-Ag閤金納米顆粒隻有一箇介于Au、Ag峰值之間的等離子體共振峰;且峰值與金的摩爾分數呈線性關繫. SEM、TEM結果錶明Ag@Au納米顆粒有約為13 nm的殼層;而Au-Ag閤金納米顆粒沒有覈殼結構,說明是閤金,併且隨著Au-Ag閤金中Au的成分的逐漸增加,粒徑趨于均勻、形貌趨于穩定的類毬型.
통과개진적Frens법,제비출함금량불동적Au-Ag합금납미과립화Ag@Au납미과립. 통과측시,UV-Vis광보결과표명,Au-Ag합금납미과립지유일개개우Au、Ag봉치지간적등리자체공진봉;차봉치여금적마이분수정선성관계. SEM、TEM결과표명Ag@Au납미과립유약위13 nm적각층;이Au-Ag합금납미과립몰유핵각결구,설명시합금,병차수착Au-Ag합금중Au적성분적축점증가,립경추우균균、형모추우은정적류구형.
Au-Ag alloy nanoparticles and Ag@Au nanoparticles were synthesized by using a modified Frens method. Only one plasmon resonance peak of Au-Ag alloy nanoparticles was observed between that of AuNPS and AgNPS in their UV-Vis spectra and the peak has a near linear relation with the Au content. Due to SEM and TEM ,the apparent Au shell of Ag@Au nanoparticles are about 13 nm,but Au-Ag alloy nanoparticles are lack of core-shell structure. Au-Ag alloy nanoparticles shift to be uniform by increasing the Au content.
