摘要
以两亲性嵌段共聚物苯乙烯-丙烯酸两嵌段共聚物(PS-b-PAA)在选择性溶剂甲苯中形成的胶束为模板,制得了尺寸均匀的金纳米颗粒,使用透射电镜和紫外吸收光谱对制得的纳米颗粒进行了表征。实验发现PS-b-PAA羧酸基团与HAuCl4有弱的相互作用;改变HAuCl4与羧酸基团的摩尔比可以得到不同尺寸的纳米颗粒;当体系中HAuCl4与羧酸基团摩尔比大于0.3时,过量的HAuCl4不能进入胶束核内,而是在溶剂中析出,纳米颗粒尺寸也不再随之增大。
Amphiphilic diblock copolymer poly (styrene)-block-poly (acrylic acid) associated to form micelles in toluene and the solution was employed as a template to prepare gold nanoparticles. Nanoparticles of narrow size distributions were obtained and characterized with TEM and UV-Vis absorption spectra. It was found that changing the mole ration of HAuCl_4 to acrylic acid monomer could control the size of the particles. Because of the weak interaction between acid radical and inorganic salt, the excessive HAuCl_4 could not enter the core of the micelles and the size of the nanoparticles could not increase further when the ratio of HAuCl_4 to acrylic acid was higher than (0.3).
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2004年第2期195-197,共3页
Polymer Materials Science & Engineering
基金
国家自然科学基金委专项基金(20023003)
