The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2009
Filed:
Dec. 17, 2004
Juan Cai, Fremont, CA (US);
Mats Larsson, Sunnyvale, CA (US);
Jifei Jia, Mountain View, CA (US);
Xianghong Hao, Sunnyvale, CA (US);
Jian Wang, San Mateo, CA (US);
Juan Cai, Fremont, CA (US);
Mats Larsson, Sunnyvale, CA (US);
Jifei Jia, Mountain View, CA (US);
Xianghong Hao, Sunnyvale, CA (US);
Jian Wang, San Mateo, CA (US);
Nanostellar, Inc., Redwood City, CA (US);
Abstract
A sample preparation method for characterization of nanoparticles embedded in the supports of heterogeneous catalysts, with improved particle dispersion, is introduced. The supported catalyst is first ground or milled into fine powder. Then, the powder is mixed into an organic solvent, and an etchant is added to the solvent to digest the supports and release metallic nanoparticles. The resulting solution is then placed in an ultrasonic bath where ultrasonic waves are generated and applied to the solution. The ultrasonic waves suppress agglomeration of the particles and also break up those particle clusters resulting from agglomeration during the prior steps. Subsequently, a sample is extracted from the solution and prepared for analysis.