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Colloidosomes: Self-Assembled Permeable Solid Shells

A new approach in exploiting self-assembly to create novel structures with building blocks of larger length scale was created in the work of Weitz and his collaborators, who created structures they call colloidosomes. These structures are made by adsorbing colloidal particles at the interface of an emulsion droplet, gently sintering the particles to stabilize the structure, and then transferring the larger droplet into a new continuous-phase of fluid which is the same as the inner fluid, thereby resulting in a solid shell with potential utility for encapsulation. An electron micrograph of a colloidosome is shown in the figure. In addition, by looking with higher magnification, the sintered layers between particles are clearly visible, as well as the remaining pores; the size of these pores can be simply controlled by the heating rate, the ripening time and the size of the colloidal particles, providing a simple means of assembling new structures that may prove useful for encapsulation.


2006

The P-nDSC: A Combinatorial Approach to Thermal Analysis of Materials

Nanoindentation of Colloidal Crystals

Sub-cellular Nanosurgery in Live Cells Using Ultrashort Laser Pulses

Cells on Asymmetric Patterns

Nematic Textures in Spherical Shells

Microfluidic Assembly of Colloidal Armor

Surface Tension Rockets

Self-assembly of Supported and Unsupported Thin Films

Public Presentations

Postdoctoral Professional Development:  Cool Labs, Hot Topics at the Museum of Science, Boston

Frontiers of Soft Condensed Matter Workshop:
Inter-MRSEC and Industry Partnership

Creation of New High Tech Jobs


2005

Double Emulsions: Droplets inside Droplets.
D.A. Weitz

Public Presentations/Strange Matter Exhibit.

Enriching Teacher Professional Development and K12 Education through RET.

A Low-Cost and Portable Medical and Diagnostic Devices Targeted for the Third World
G. M. Whitesides and D.A. Edwards

Biomechanics at the Scale of the Cell and below Using Laser Surgery
D. Ingber, E. Mazur and D.A. Weitz

Direct Visualization of Shear in a Colloidal Glass
F. Spaepen and D.A. Weitz

Crawling of C. Elegans: How a Worm’s Motion Leads to Fundamental Understanding at the Interface of Biomechanics and Neuroscience
A. Samuel and L. Mahadevan


2004

Career Development for Young Scientists.
Educational Programs

Fracture in Drying Nanoparticle Suspensions.
Weitz, Hutchinson, and Xie


2003

From Bosnian Emigré to Graduate Study.
Tanja Hadzic, (Department of Immunolgy, University of Iowa)

How Research Opportunities Shape Scientific Careers.
Dr. Nadya Mason, (Society of Junior Fellows, Harvard University).

Colloidosomes: Self-Assembled Permeable Solid Shells.
Weitz

Packing Spheres on a Spherical Surface: New Solution to a 100-year-old Problem.
Nelson and Weitz


2002

Attractive Interactions Between Like-Charged Colloidal Particle on Surfaces.
Michael Brenner and David Weitz

Stress Evolution During E-Beam Deposition of Amorphous Alumina.
Frans Spaepen

Novel Laser Patterning of Silicon Surfaces.
Cynthia Friend and Eric Mazur

CARS Imaging of Cells.
Sunney Xie


2001
 
Avalanche Photodiode using Microtextured Silicon.
Eric Mazur and Cynthia Friend

Ab-initio Multiscale Simulation of Piezoelectric Response.
Efthimios Kaxiras and Jim Rice

Fabrication of Complex, 3-D Microstructures.
George Whitesides
Generating Microgradients.
George Whitesides and Howard Stone
Photodisruption in Cells using Femtosecond Laser Pulses.
Eric Mazur and Donald Ingber
Micromachining Transparent Materials with Femtosecond Laser Pulses.
Eric Mazur
Atom Cloud Trapped by Magnetic Laminate inside a Magneto Optical Trap.
Mara Prentiss
Electron Flow in a High Mobility Two Dimensional Electron Gas.
Eric Heller and Robert Westervelt
Fluctuating Spin g-tensor in Small Metal Grains.
Bertrand Halperin
Ballistic Electron Emission Microscopy and Spectroscopy. BEEM/BEES.
Venky Narayanamurti

2000
 
Three-dimensional Networks of Fluid Channels in PDMS.
George Whitesides
Optical Waveguides.
Eric Mazur
Ultrathin Uniform Nanowires.
Michael Tinkham
Micro-electromagnet Atom Guide.
Mara Prentiss and Robert Westervelt
GaSb Self-assembled Quantum Dots on GaAs.
Venky Narayanamurti
 


Last Modified June 8, 2006
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