物理化学学报 >> 2006, Vol. 22 >> Issue (09): 1090-1094.doi: 10.3866/PKU.WHXB20060911

研究论文 上一篇    下一篇

非紧密堆积型光子晶体凝胶的胀缩行为

董健;曹跃霞;刘亮亮;许桂兰;钱卫平   

  1. (东南大学生物科学与医学工程系, 生物电子学国家重点实验室, 南京 210096)
  • 收稿日期:2006-03-15 修回日期:2006-04-14 发布日期:2006-09-04
  • 通讯作者: 钱卫平 E-mail:wqian@seu.edu.cn

Swelling-Shrinking of Non-close-packed Photonic Crystal Gels

DONG Jian;CAO Yue-Xia;LIU Liang-Liang;XU Gui-Lan;QIAN Wei-Ping   

  1. (State Key Laboratory of Bioelectronics, Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China)
  • Received:2006-03-15 Revised:2006-04-14 Published:2006-09-04
  • Contact: QIAN Wei-Ping E-mail:wqian@seu.edu.cn

摘要: 制备了Bragg衍射峰波长位置在700~800 nm之间的非紧密堆积型光子晶体凝胶(NCPPCGs). 通过自然干燥失水, 复水浸泡, 不同浓度的乙醇溶液浸泡和不同pH缓冲溶液浸泡等处理, 研究了NCPPCGs的溶胀、收缩(胀缩)行为和Bragg衍射峰迁移的关系; 在凝胶自然干燥失水过程中, Bragg衍射峰蓝移, 复水浸泡后, Bragg衍射峰快速红移至干燥前的位置; 凝胶经不同浓度的乙醇溶液浸泡后, 凝胶体积改变, 并且乙醇浓度升高时, Bragg衍射峰蓝移; 经水解处理的NCPPCGs具有pH 响应特性, 当其浸泡在pH为2.2~9.6的缓冲溶液中时, 随pH值的增大Bragg衍射峰红移, pH为9.6~10.6时, Bragg衍射峰蓝移. 外界因素导致NCPPCGs的Bragg衍射峰位置的迁移覆盖整个可见光区域.

关键词: 非紧密堆积型光子晶体凝胶, 胀缩行为, Bragg衍射峰

Abstract: The non-close-packed photonic crystal gels (NCPPCGs) with the range of Bragg diffractive peaks from 700 nm to 800 nm were fabricated. The relation between the swelling-shrinking of NCPPCGs and the shifts of the Bragg diffractive peaks was studied by their dehydrating in air and immersing in ethanol solutions with different concentrations and buffers with different pHs. When they were dehydrated in air, the Bragg diffractive peaks of the NCPPCGs blue-shifted; when they were immersed in water, the Bragg diffractive peaks of the dehydrated NCPPCGs red-shifted to the original position rapidly. The volume of the NCPPCGs varied when they were immersed in ethanol solutions with different concentrations, and their Bragg diffractive peaks blue-shifted proportionally with the concentrations of ethanol. The hydrolyzed NCPPCGs were pH-sensitive, and their Bragg diffractive peaks red-shifted in the pH range from 2.2 to 9.6, but blue-shifted in the pH range from 9.6 to 10.6. The Bragg diffractive peak positions of the prepared NCPPCGs can cover the entire visible region of light.

Key words: NCPPCGs, Swelling-shrinking, Bragg diffractive peak