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

DONG Jian, (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), (State Key Laboratory of Bioelectronics, Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China), CAO Yue-Xia, LIU Liang-Liang, XU Gui-Lan, QIAN Wei-Ping
2006 Wuli huaxue xuebao  
学位论文基金(YBJJ0519)资助项目 鬁EditorialofficeofActaPhysico鄄ChimicaSinica 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 鄢 (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) 摘要 制备了Bragg衍射峰波长位置在700耀800nm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耀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耀10.6 时,Bragg 衍射峰蓝移.
more » ... 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 中图分类号: O648 Abstract Thenon鄄close鄄packedphotoniccrystalgels(NCPPCGs)withtherangeofBraggdiffractivepeaksfrom 700nmto800nmwerefabricated.Therelationbetweentheswelling鄄shrinkingofNCPPCGsandtheshiftsofthe Braggdiffractivepeakswasstudiedbytheirdehydratinginairandimmersinginethanolsolutionswithdifferent concentrationsandbufferswithdifferentpHs.Whentheyweredehydratedinair,theBraggdiffractivepeaksofthe NCPPCGsblue鄄shifted;whentheywereimmersedinwater,theBraggdiffractivepeaksofthedehydratedNCPPCGs red鄄shiftedtotheoriginalpositionrapidly.ThevolumeoftheNCPPCGsvariedwhentheywereimmersedinethanol solutionswithdifferentconcentrations,andtheirBraggdiffractivepeaksblue鄄shiftedproportionallywiththe concentrationsofethanol.ThehydrolyzedNCPPCGswerepH鄄sensitive,andtheirBraggdiffractivepeaksred鄄shifted inthepHrangefrom2.2to9.6,butblue鄄shiftedinthepHrangefrom9.6to10.6.TheBraggdiffractivepeakpositions ofthepreparedNCPPCGscancovertheentirevisibleregionoflight.
doi:10.3866/pku.whxb20060911 fatcat:dtr2xz5itbdydfamzeb7z6dwxq