We present a straightforward and rapid surface acoustic wave (SAW) atomization-based technique for encapsulating proteins into 10 mum order particles composed of a biodegradable polymeric excipient, using bovine serum albumin (BSA) as an exemplar. Scans obtained from confocal microscopy provide qualitative proof of encapsulation and show the fluorescent conjugated protein to be distributed in a...

A highly selective impedance transformation filtering technique suitable for tunable selective RF receivers is proposed in this paper. To achieve blocker rejection comparable to SAW filters, we use a two stage architecture based on a low noise trans-conductance amplifier (LNTA). The filter rejection is captured by a linear periodically varying (LPV) model that includes band limitation by the LN...

In this study, we report a fully described modeling and simulation of a piezoelectric layered structure for surface acoustic wave (SAW) applications. SAW propagation characteristics were numerically investigated in ZnO/IDT/128° YX LiNbO3. The numerical analysis was conducted using Finite Element Method (FEM) in COMSOL Multiphysics 4.3b platform. The numerical results show that the electromechan...

The evaluation of fallopian tubes after failed tubal ligation can be difficult because conventional histopathological techniques are unable to section the metal clips when in situ. Once the clips have been removed, any evidence of tube patency is lost. This report describes a technique of embedding and sectioning that enables sections to be made while the metal clips are still in situ. This is ...

This paper presents a model based decision support system (DSS) for evaluating performance. Performance evaluation in business is difficult. Multicriteria methods are used for evaluation of performance of public and private organizations. The proposed system is based on financial ratios and some methods such as Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Id...

The use of polymer coated surface acoustic wave (SAW) sensor arrays is a very promising technique for highly sensitive and selective detection of volatile organic compounds (VOCs). We present new developments to achieve a low cost sensor setup with a sampling method enabling the highly reproducible detection of volatiles even in the ppb range. Since the VOCs of coffee are well known by gas chro...

The work herein analyzes the bending stress required to separate and rupture die from notched silicon wafers. Trenches are formed on the wafers using either a dicing or Bosch deep reactive ion etching (DRIE) process. Weibull distribution parameters are reported for all variations of the fracture experiments. Additionally, the relative defect rate associated with DRIE-based die separation are co...

Abstract We measured the attenuation of GHz frequency surface acoustic waves (SAWs) on the Si (001) surface using an optical pump-probe technique at temperatures between 300 and 600 K. SAWs are generated and detected by a 700 nm Al grating fabricated by nano-imprint lithography. The grating for SAW generation is separated from the grating for SAW detection by ≈ 150 μm. The amplitude of SAWs is ...

The detection of tumors in soft tissues, such as breast cancer, is important to achieve at the earliest stages of the disease to improve patient outcome. Tumors often exhibit a greater elastic modulus compared to normal tissues. In this paper, we report our first study to measure elastic properties of soft tissues by mapping the surface acoustic waves (SAWs) with image plane digital holography....

Cell separation techniques are used widely in immunology studies. The one-step antigen-specific separation technique on a microfluidic platform based on shear horizontal surface acoustic wave (SH-SAW) sensors. With the specific antibodies conjugated onto the surface of the SH-SAW sensors could be used to specifically recognize the specific cells in the clinical body fluids. The cell isolation a...