公开(公告)号：EP2398734A4

公开(公告)日：2013-07-10

申请号：EP10744084

申请日：2010-02-23

申请人： UNIV CALIFORNIA

发明人： YIN YADONG ,  GE JIANPING

IPC分类号： C01G49/08 ,  C09C1/24

CPC分类号： C09C1/24 ,  C01G49/08 ,  C01P2006/42

摘要： A method of assembling superparamagnetic colloids into ordered structures with magnetically tunable photonic properties in nonpolar solvents by establishing long-range electrostatic repulsive forces using charge control agents. Reverse micelles resulted from the introduction of charge control agents such as AOT molecules can enhance the charge separation on the surfaces of n-octadecyltrimethoxysilane modified Fe3O4@SiO2 particles. The significantly improved long-range electrostatic repulsion can counterbalance the magnetically induced attraction and therefore allow ordering of superparamagnetic colloids in nonpolar solvents. This system possesses fast and fully reversible optical response to the external magnetic fields, long-term stability in performance, and good diffraction intensity.

公开(公告)号：EP2419479A4

公开(公告)日：2017-11-22

申请号：EP10764767

申请日：2010-04-14

申请人： UNIV CALIFORNIA ,  KWON SUNGHOON

发明人： KWON SUNGHOON ,  YIN YADONG ,  GE JIANPING

IPC分类号： C09C3/00 ,  B82B3/00

CPC分类号： H01F1/0063 ,  B01J19/12 ,  B01J19/123 ,  B82Y20/00 ,  B82Y25/00 ,  C01P2006/42 ,  C08K3/22 ,  C08K9/08 ,  C08K2201/01 ,  C08K2201/011 ,  C09C1/24 ,  C09C3/10 ,  C09D7/1225 ,  C09D7/1283 ,  C09D7/62 ,  C09D7/69 ,  C09D11/50 ,  G02B1/005 ,  G02B5/201 ,  G02B2207/101 ,  G02F1/09 ,  G02F1/29 ,  H01F1/344 ,  Y10T428/24802

摘要： Compositions and methods wherein ordered structures of photonic nanocrystals are created in a liquid medium and then such structures are fixed by converting the liquid medium to a solid. In addition, compositions and methods of reversibly fixing such structures, so that ordered structures can be reversibly created in a liquid medium, converted to solid, and then converted back to liquid, wherein new ordered structures can be created and again fixed.