Patent search ap:("IMRA AMERICA Page INC.") AND inv:"Andrius Marcinkevicus"

1.

发明授权
Methods for preparing aqueous suspension of precious metal nanoparticles 有权

公开(公告)号：US10184025B2

公开(公告)日：2019-01-22

申请号：US14161773

申请日：2014-01-23

Applicant: IMRA AMERICA, INC.

Inventor： Yuki Ichikawa , Andrius Marcinkevicus , Masayuki Ito , Wei Qian

IPC: B01J13/00 , C08G65/328 , B82Y30/00

Abstract: The present disclosure is directed to methods of preparing stable suspensions of precious metal nanoparticles and methods for attaching bio-molecules to the nanoparticles. The formation of nanoparticles can be accomplished by either chemical synthesis or pulsed laser ablation in a liquid. The present disclosure reveals the importance of controlling the conductivity of the dispersion medium during pulsed laser ablation in a liquid to control the particle size of the nanoparticles. The present disclosure also reveals the importance of adjusting and maintaining the conductivity in a range of 25 μS/cm or less during storage of the nanoparticles and just prior to performing bioconjugation reactions. The control of conductivity is an important process for maintaining the nanoparticles as a stable non-aggregated colloidal suspension in a dispersion medium.

2.

发明授权
Method of reliable particle size control for preparing aqueous suspension of precious metal nanoparticles and the precious metal nanoparticle suspension prepared by the method thereof 有权

公开(公告)号：US09999865B2

公开(公告)日：2018-06-19

申请号：US14312824

申请日：2014-06-24

Applicant: IMRA America, Inc.

Inventor： Yuki Ichikawa , Andrius Marcinkevicus

IPC: B01J13/00 , B82Y40/00

CPC classification number: B01J13/0043 , B82Y40/00

Abstract: Disclosed is a method for making a colloidal suspension of precious metal nanoparticles. The method comprises providing a target material comprising a precious metal in a liquid dispersion medium in an ablation container. The dispersion medium has an electrical conductivity within a predetermined conductivity range. Laser pulses are used to generate the nanoparticles from the target in the container. While generating the nanoparticles the electrical conductivity of the dispersion medium is monitored and maintained within the predetermined range and thereby the generated nanoparticles are produced within a predetermined size range. The generated nanoparticles are used to form a colloidal suspension.

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