Method for scalable production of nanoshells using salt...

Details Method for scalable production of nanoshells using salt... Method for scalable production of nanoshells using salt...

2005-06-21

2005-06-21

Wyszomierski, George (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

C075S371000, C210S639000, C210S650000, C210S651000

Reexamination Certificate

active

06908496

ABSTRACT:
A method for purifying a suspension containing colloid-seeded nanoparticles and excess colloids is provided that includes adding to the suspension a filter aid comprising a salt. The method further includes filtering the suspension with a filter of a pore size intermediate between the average colloid-seeded nanoparticle size and the average excess colloid size, so as to form a retentate that includes the majority of the colloid-seeded nanoparticles and a filtrate that includes the majority of the excess colloids. Still further, the method includes collecting the retentate. The method may be incorporated into a method of making metallized nanoparticles, such as nanoshells, by reduction of metal ions onto the purified colloid-seed nanoparticles so as to form the metallized nanoparticles.

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John C. Crocker;Measurement of the Hydrodynamic Corrections to the Brownian Motion of Two Colloidal Spheres;J. Chem. Phys. 106(7) Feb. 15, 1997; (pp. 2837-2840).

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