Work

Decoupling mass adsorption from fluid viscosity and density in quartz crystal microbalance measurements using normalized conductance modeling

Year: 2013

Type: article

Abstract: We describe the physical understanding of a method which differentiates between the frequency shift caused by fluid viscosity and density from that caused by mass adsorption in the resonance of a quartz crystal resonator. This method uses the normalized conductance of the crystal to determine a critical frequency at which the fluid mass and fluid loss compensate each other. Tracking the shift in this critical frequency allows us to determine purely mass adsorption on the crystal. We extended this method to Maxwellian fluids for understanding the mass adsorption in non-Newtonian fluids. We validate our approach by real-time mass adsorption measurements using glycerol and albumin solutions.

Source: Measurement Science and Technology

DOI: 10.1088/0957-0233/24/8/085301

Authors: Z Parlak, C Biet, S Zauscher

Institutions: Duke University, Technische Universität Berlin

Language: English

Topic: Acoustic Wave Resonator Technologies

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, Consejo Nacional de Ciencia y Tecnología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Division of Chemical, Bioengineering, Environmental, and Transport Systems

Awards: REU Site for Increasing Diversity in Engineering at Duke University, GOALI Collaborative Research: Engineering magnetorheological fluids by controlling nonmagnetic particle interactions