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Zuyan Shen Phones & Addresses

  • Santa Clara, CA
  • 3929 Powelton Ave, Philadelphia, PA 19104
  • 3375 Homestead Rd APT 13, Santa Clara, CA 95051

Publications

Us Patents

Piezoelectric Microcantilevers And Uses In Atomic Force Microscopy

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US Patent:
7992431, Aug 9, 2011
Filed:
Nov 28, 2007
Appl. No.:
11/946534
Inventors:
Wan Y. Shih - Bryn Mawr PA,
Wei-Heng Shih - Bryn Mawr PA,
Zuyan Shen - Philadelphia PA,
Qing Zhu - Philadelphia PA,
Assignee:
Drexel University - Philadelphia PA
International Classification:
G01B 5/28
US Classification:
73105
Abstract:
The invention is direct to a piezoelectric microcantilever for static contact and dynamic noncontact atomic force microscopy which may be carried out in solution. The piezoelectric microcantilever, which includes a piezoelectric layer and a non-piezoelectric layer is capable of self actuation and detection. The piezoelectric layer may be constructed from a lead magnesium niobate-lead titanate (Pb(MgNb)O)—(PbTiO)(PMN-PT)(PMN-PT), zirconate titanate (PZT)/SiOor from any lead-free piezoelectric materials such as doped sodium-potassium niobate-lithium niobate. The piezoelectric layers of the microcantilevers may have dielectric constants of from 1600-3000 and thicknesses below 10 μm. Also disclosed are methods for fabricating microcantilever sensors and methods for atomic force microscopy employing the microcantilevers.

Piezoelectric Cantilever Sensors

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US Patent:
2007008, Apr 26, 2007
Filed:
Oct 27, 2004
Appl. No.:
10/595570
Inventors:
Wan Shih - BRYN MAWR PA,
Wei-Heng Shih - BRYN MAWR PA,
Zuyan Shen - PHILADELPHIA PA,
Assignee:
drexel University - Philadelphia VA
International Classification:
G01H 13/00
US Classification:
073579000
Abstract:
A piezoelectric cantilever with a non-piezoelectric, or piezoelectric tip useful as mass and viscosity sensors. The change in the cantilever mass can be accurately quantified by monitoring a resonance frequency shift of the cantilever. For bio-detection, antibodies or other specific receptors of target antigens may be immobilized on the cantilever surface, preferably on the non-piezoelectric tip. For chemical detection, high surface-area selective absorbent materials are coated on the cantilever tip. Binding of the target antigens or analytes to the cantilever surface increases the cantilever mass. Detection of target antigens or analytes is achieved by monitoring the cantilever's resonance frequency and determining the resonance frequency shift that is due to the mass of the adsorbed target antigens on the cantilever surface. The use of a piezoelectric unimorph cantilever allows both electrical actuation and electrical sensing. Incorporating a non-piezoelectric tip () enhances the sensitivity of the sensor. In addition, the piezoelectric cantilever can withstand damping in highly viscous liquids and can be used as a viscosity sensor in wide viscosity range.

Sol-Gel Precursors And Methods For Making Lead-Based Perovskite Films

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US Patent:
2010005, Mar 4, 2010
Filed:
Nov 6, 2007
Appl. No.:
12/513308
Inventors:
Wei-Heng Shih - Bryn Mawr PA,
Wan Y. Shih - Bryn Mawr PA,
Zuyan Shen - Philadelphia PA,
Huidong Li - Newark DE,
Xiaotong Gao - Philadelphia PA,
Assignee:
DREXEL UNIVERSITY - PHILADELPHIA PA
International Classification:
C23C 14/08
B05D 3/02
US Classification:
20419218, 427380
Abstract:
A simple, economical sol-gel method was invented to produce thick and dense lead zirconate titanate (PZT) thin films that exhibit the stoichiometric chemical composition and unprecedented electrical and dielectric properties. The PZT films are the foundation of many microelectromechanical systems (MEMS) and nanoelectromechanical systems (NEMS) for micro/nano sensors and actuators applications.

Piezoelectric Microcantilever Sensors For Biosensing

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US Patent:
2010006, Mar 18, 2010
Filed:
Nov 28, 2007
Appl. No.:
12/514941
Inventors:
Wan Y. Shih - Bryn Mawr PA,
Wei-Heng Shih - Bryn Mawr PA,
Zuyan Shen - Philadelphia PA,
John-Paul Mcgovern - Philadelphia PA,
Qing Zhu - Philadelphia PA,
Joseph Capobianco - Marlton NJ,
Assignee:
DREXEL UNIVERSITY - PHILADELPHIA PA
International Classification:
C12Q 1/70
G01N 30/00
G01N 33/566
C12Q 1/00
C12Q 1/02
US Classification:
435 5, 422 69, 436501, 435 4, 435 29
Abstract:
A piezoelectric microcantilever for sensing compounds or molecules. The piezoelectric microcantilever, may include at least one electrode, an insulation layer, a receptor, an immobilization layer, a non-piezoelectric layer and a piezoelectric layer The sensor is capable of self actuation and detection. The piezoelectric layer may be constructed from a highly piezoelectric thin lead magnesium niobate-lead titanate film, a highly piezoelectric thin zirconate titanate film, a highly piezoelectric lead-free film. Methods of using the sensors and flow cells and arrays including the sensors are also described.

Piezoelectric Microcantilevers And Uses In Atomic Force Microscopy

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US Patent:
2011026, Oct 27, 2011
Filed:
Jun 14, 2011
Appl. No.:
13/160304
Inventors:
WAN Y. SHIH - BRYN MAWR PA,
WEI-HENG SHIH - BRYN MAWR PA,
ZUYAN SHEN - PHILADELPHIA PA,
QING ZHU - PHILADELPHIA PA,
Assignee:
DREXEL UNIVERSITY - PHILADELPHIA PA
International Classification:
G01Q 60/24
US Classification:
850 33
Abstract:
The invention is direct to a piezoelectric microcantilever for static contact and dynamic noncontact atomic force microscopy which may be carried out in solution. The piezoelectric microcantilever, which includes a piezoelectric layer and a non-piezoelectric layer is capable of self actuation and detection. The piezoelectric layer may be constructed from a lead magnesium niobate-lead titanate (Pb(MgNb)O)—(PbTiO)(PMN-PT) (PMN-PT), zirconate titanate (PZT)/SiOor from any lead-free piezoelectric materials such as doped sodium-potassium niobate-lithium niobate. The piezoelectric layers of the microcantilevers may have dielectric constants of from 1600-3000 and thicknesses below 10 μm. Also disclosed are methods for fabricating microcantilever sensors and methods for atomic force microscopy employing the microcantilevers.
Zuyan Shen from Santa Clara, CA, age ~44 Get Report