公开(公告)号：US11155715B2

公开(公告)日：2021-10-26

申请号：US14907197

申请日：2014-07-13

Applicant: President and Fellows of Harvard College

Inventor： Joanna Aizenberg ,  Nicolas Vogel ,  Ian Burgess ,  Mathias Kolle ,  Tanya Shirman ,  Stefanie Utech ,  Katherine Phillips ,  David A. Weitz ,  Natalie Koay

IPC: C09C1/00 ,  A61K8/19 ,  A61K8/81 ,  A61K8/29 ,  C09D17/00 ,  A61K8/25 ,  C09C3/06 ,  A61Q1/02 ,  C09C1/62 ,  A61K8/02 ,  A61Q1/06

Abstract: A structurally colored pigment is described that contains a plurality of photonic crystal particles dispersed in a medium, where each photonic crystal particles contains a plurality of spectrally selective absorbing components dispersed within the photonic crystal particle. In certain embodiments, each photonic crystal particle has a predetermined minimum number of repeat units of the photonic crystal structure. The structurally colored material provides improved reflectance, long-term stability, and control of the desired optical effects. The fabrication techniques described herein also provide high throughput and high yield allowing use in wide ranging applications from cosmetics, paints, signs, sensors, to packaging material.

公开(公告)号：US11325114B2

公开(公告)日：2022-05-10

申请号：US16391053

申请日：2019-04-22

Applicant: President and Fellows of Harvard College

Inventor： Joanna Aizenberg ,  Tanya Shirman ,  Nicolas Vogel ,  Mathias Kolle ,  Michael Aizenberg

IPC: B01J35/10 ,  C04B38/00 ,  B01J23/52 ,  B01J37/00 ,  B82Y40/00 ,  B82Y30/00 ,  C04B111/00

Abstract: Methods for forming an interconnected network of solid material and pores, with metal residing only at the air/solid interface of the interconnected network structure are described. In certain embodiments, nanoparticle decorated sacrificial particles can be used as sacrificial templates for the formation of a porous structure having an interconnected network of solid material and interconnected network of pores. The nanoparticles reside predominantly at the air/solid interface and allow further growth and accessibility of the nanoparticles at defined positions of the interconnected structure. SEM and TEM measurements reveal the formation of 3D interconnected porous structures with nanoparticles residing predominantly at the air/solid interface of the interconnected structure.

公开(公告)号：US10422947B2

公开(公告)日：2019-09-24

申请号：US16165490

申请日：2018-10-19

Applicant: President and Fellows of Harvard College ,  University of Exeter

Inventor： Joanna Aizenberg ,  Mathias Kolle ,  Peter Vukusic ,  Robert D. Howe

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/028 ,  G02B1/00 ,  G01L1/24

Abstract: The rolled photonic fibers presents two codependent, technologically exploitable features for light and color manipulation: regularity on the nanoscale that is superposed with microscale cylindrical symmetry, resulting in wavelength selective scattering of light in a wide range of directions. The bio-inspired photonic fibers combine the spectral filtering capabilities and color brilliance of a planar Bragg stack compounded with a large angular scattering range introduced by the microscale curvature, which also decreases the strong directional chromaticity variation usually associated with flat multilayer reflectors. Transparent and elastic synthetic materials equip the multilayer interference fibers with high reflectance that is dynamically tuned by longitudinal mechanical strain. A two-fold elongation of the elastic fibers results in a shift of reflection peak center wavelength of over 200 nm.

公开(公告)号：US10265694B2

公开(公告)日：2019-04-23

申请号：US14900567

申请日：2014-06-30

Applicant: President and Fellows of Harvard College

Inventor： Joanna Aizenberg ,  Tanya Shirman ,  Nicolas Vogel ,  Mathias Kolle ,  Michael Aizenberg

IPC: B01J35/10 ,  C04B38/00 ,  B01J23/52 ,  B01J37/00 ,  B82Y40/00 ,  B82Y30/00 ,  C04B111/00

Abstract: Methods for forming an interconnected network of solid material and pores, with metal residing only at the air/solid interface of the interconnected network structure are described. In certain embodiments, nanoparticle decorated sacrificial particles can be used as sacrificial templates for the formation of a porous structure having an interconnected network of solid material and interconnected network of pores. The nanoparticles reside predominantly at the air/solid interface and allow further growth and accessibility of the nanoparticles at defined positions of the interconnected structure. SEM and TEM measurements reveal the formation of 3D interconnected porous structures with nanoparticles residing predominantly at the air/solid interface of the interconnected structure.

公开(公告)号：US10146007B2

公开(公告)日：2018-12-04

申请号：US14760306

申请日：2014-01-23

Applicant: President and Fellows of Harvard College ,  University of Exeter

Inventor： Joanna Aizenberg ,  Mathias Kolle ,  Peter Vukusic ,  Robert D. Howe

IPC: G02B6/00 ,  G02B6/02 ,  G01L1/24 ,  G02B1/00 ,  G02B6/028 ,  G02B6/036

Abstract: The rolled photonic fibers presents two codependent, technologically exploitable features for light and color manipulation: regularity on the nanoscale that is superposed with microscale cylindrical symmetry, resulting in wavelength selective scattering of light in a wide range of directions. The bio-inspired photonic fibers combine the spectral filtering capabilities and color brilliance of a planar Bragg stack compounded with a large angular scattering range introduced by the microscale curvature, which also decreases the strong directional chromaticity variation usually associated with flat multilayer reflectors. Transparent and elastic synthetic materials equip the multilayer interference fibers with high reflectance that is dynamically tuned by longitudinal mechanical strain. A two-fold elongation of the elastic fibers results in a shift of reflection peak center wavelength of over 200 nm.