Fudan University

Saint-Gobain Abrasives, Inc.

Saint-Gobain Surface Solutions France

Ccs(shanghai) Functional Films Industry Co., Ltd.

Qing Wang

Jia Zhou

Antoine Jean-Pierre Rene Riaud

Nilanjan Sarangi

Guangyong Lin

Lu Lu

Qingsong Jin

Zhenyu Luo

The invention discloses an apparatus and a method for capturing and manipulating particles, relating to the field of acoustic manipulation. In view of the problems in the prior art that can't achieve a contactless, versatile, selective, and universal manipulation method for particles, the present application provides photoacoustic tweezers, which uses a photoacoustic transducer unit and an electroacoustic transducer unit to form a bimodal transducer, generates a weak acoustic wave and strong acoustic wave respectively through signal excitation. The strong acoustic wave behaving as a gain medium, amplifies the acoustic radiation force of the weak acoustic wave. The invention enables contactless and label-free selective capture and manipulation of particles. Further, the amplified acoustic radiation force enhances biocompatibility by requiring lower optical powers than alternative optical methods.

Apparatus and system for particle manipulation

The subject application relates to bonded abrasive with low wetting bond material. An abrasive article including a bonded abrasive body having a particular MOR/EMOD ratio associated with a particular bond vol %. The body also can include a) an average Bond Post Area (BPA) of not greater than microns; b) an average Bond Post Count (BPC) of at least 140 per 1536 mm; c) an average bond wetting radius of at least 30/microns; or d) a combination of a) and b).

Bonded abrasive with low wetting bond material

The invention discloses a method and an apparatus for trapping and manipulating particles, relating to the field of acoustic manipulation. The invention discloses a photoacoustic tweezers, which use bimodal transducer generate a weak acoustic wave and a strong acoustic wave. The strong acoustic wave behaves as an effective gain medium to amplify the acoustic radiation force of this weak acoustic wave. After an interference of the strong acoustic wave and the weak acoustic wave, an amplified trapping force is produced for achieving the trapping and manipulation of particles. The invention can manipulate several particles simultaneously in high throughput and particles of various sizes ranging from 1 μm to 1 mm. The invention can form reconfigurable acoustic fields which permits versatile and selective manipulation with no need of complicated acoustic arrays. The invention is a versatile, biocompatible, selective and high-throughput manipulation method.

Photoacoustic tweezers

Growing community of inventors

Shanghai, China

Qing Wang