公开(公告)号：US20120061609A1

公开(公告)日：2012-03-15

申请号：US13202867

申请日：2010-02-23

Applicant: Yadong Yin ,  Jianping Ge

Inventor： Yadong Yin ,  Jianping Ge

IPC: H01F1/032

CPC classification number: C09C1/24 ,  C01G49/08 ,  C01P2006/42

Abstract: 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.

Abstract translation: 通过使用电荷控制剂建立远程静电排斥力，将超顺磁胶体组装成具有可调谐光子性质的非极性溶剂的有序结构的方法。 引入电荷控制剂如AOT分子产生的反胶束可以增强正十八烷基三甲氧基硅烷改性Fe 3 O 4 @ SiO 2颗粒表面上的电荷分离。 显着改善的远程静电排斥可以抵消磁力诱导的吸引力，因此允许超顺磁胶体在非极性溶剂中排序。 该系统对外部磁场具有快速，完全可逆的光学响应，性能长期稳定，衍射强度好。

公开(公告)号：US09862831B2

公开(公告)日：2018-01-09

申请号：US13202867

申请日：2010-02-23

Applicant: Yadong Yin ,  Jianping Ge

Inventor： Yadong Yin ,  Jianping Ge

IPC: H01F1/00 ,  C09C1/24 ,  C01G49/08

CPC classification number: C09C1/24 ,  C01G49/08 ,  C01P2006/42

Abstract: 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：US20130146788A1

公开(公告)日：2013-06-13

申请号：US13264411

申请日：2010-04-14

Applicant: Yadong Yin ,  Jianping Ge ,  Sunghoon Kwon

Inventor： Yadong Yin ,  Jianping Ge ,  Sunghoon Kwon

IPC: B01J19/12 ,  G02F1/29 ,  G02F1/09

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

Abstract: 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.

Abstract translation: 组合物和方法，其中在液体介质中产生光子纳米晶体的有序结构，然后通过将液体介质转化为固体来固定这些结构。 此外，可逆地固定这种结构的组合物和方法，使得有序结构可以在液体介质中可逆地产生，转化为固体，然后转化回液体，其中可以产生并再次固定新的有序结构。

公开(公告)号：US20100224823A1

公开(公告)日：2010-09-09

申请号：US12597794

申请日：2008-04-26

Applicant: Yadong Yin ,  Jianping Ge

Inventor： Yadong Yin ,  Jianping Ge

IPC: C01G49/08

CPC classification number: C01G49/08 ,  B82Y30/00 ,  C01P2002/72 ,  C01P2002/80 ,  C01P2004/04 ,  C01P2004/32 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/84 ,  C01P2006/42 ,  C01P2006/60 ,  C09C1/24 ,  G02F1/09 ,  G02F2202/32

Abstract: Monodisperse colloidal nanocrystal clusters of magnetite (Fe3O4) with tunable sizes from about thirty to about three hundred nanometers have been synthesized using a high-temperature hydrolysis process. The colloidal nanocrystal clusters are capped with polyelectrolytes, and highly water soluble. Each cluster is composed of many single magnetite crystallites, thus retaining the superparamagnetic behavior at room temperature. The combination of superparamagnetic property, high magnetization, and high water dispersibility makes the colloidal nanocrystal clusters ideal candidates for various important biomedical applications such as drug delivery and bioseparation. The present invention is further directed to methods for forming colloidal photonic crystals from both aqueous and nonaqueous solutions of the superparamagnetic colloidal nanocrystal clusters with an external magnetic field applied thereto. The diffraction of the photonic crystals can be tuned from near infrared to visible and further ultraviolet spectral region by varying the external magnetic field.

Abstract translation: 已经使用高温水解方法合成了具有约30至约300纳米可调尺寸的磁铁矿（Fe 3 O 4）的单分散胶体纳米晶簇。 胶体纳米晶簇用聚电解质封盖，水溶性高。 每个簇由许多单个磁铁矿晶体组成，因此在室温下保持超顺磁性能。 超顺磁性，高磁化强度和高水分散性的组合使得胶体纳米晶体簇成为各种重要生物医学应用如药物递送和生物分离的理想候选物。 本发明还涉及从施加有外部磁场的超顺磁性胶体纳米晶簇的水溶液和非水溶液形成胶体光子晶体的方法。 光子晶体的衍射可以通过改变外部磁场从近红外到可见光和进一步的紫外光谱区域进行调节。

公开(公告)号：US10118834B2

公开(公告)日：2018-11-06

申请号：US12597794

申请日：2008-04-26

Applicant: Yadong Yin ,  Jianping Ge

Inventor： Yadong Yin ,  Jianping Ge

IPC: C01G49/08 ,  G02F1/29 ,  H01F1/34 ,  H01F1/00 ,  G02B1/00 ,  C09C1/24 ,  B82Y30/00 ,  G02F1/09

Abstract: Monodisperse colloidal nanocrystal clusters of magnetite (Fe3O4) with tunable sizes from about thirty to about three hundred nanometers have been synthesized using a high-temperature hydrolysis process. The colloidal nanocrystal clusters are capped with polyelectrolytes, and highly water soluble. Each cluster is composed of many single magnetite crystallites, thus retaining the superparamagnetic behavior at room temperature. The combination of superparamagnetic property, high magnetization, and high water dispersibility makes the colloidal nanocrystal clusters ideal candidates for various important biomedical applications such as drug delivery and bioseparation. The present invention is further directed to methods for forming colloidal photonic crystals from both aqueous and nonaqueous solutions of the superparamagnetic colloidal nanocrystal clusters with an external magnetic field applied thereto. The diffraction of the photonic crystals can be tuned from near infrared to visible and further ultraviolet spectral region by varying the external magnetic field.