V16_Paper Parameters in Materials Electrical Engineering

Play an AI-generated podcast conversation about this lesson

What parameter is defined as the ratio of a paper's inner area to its projected area?

Surface roughness

Protein binding capacity

Pore size (correct)

Porosity

Which material is NOT listed as a potential hydrophobic agent for creating micron-scale capillary channels on paper?

Polyethylene (correct)

Wax

Paraffin

Polystyrene

What is the preferred color for the paper in the context of colorimetric tests mentioned in the text?

Green

Blue

Yellow

White (correct)

Which parameter relates to the time required for a sample to move along and saturate the paper with a defined length?

Capillary flow rate Signup and view all the answers

What type of charge is preferred in papers used for colorimetric tests according to the text?

Low electrostatic charge Signup and view all the answers

Which characteristic is NOT mentioned as a paper parameter for microfluidic paper-based devices in the text?

Color quality Signup and view all the answers

What is the purpose of using wax as the 'ink' in the wax printing fabrication method?

To create hydrophobic barriers on the paper Signup and view all the answers

What is the key difference between the wax printing and the alkyl ketene dimer (AKD) printing methods for fabricating paper-based microfluidic devices?

Wax printing is a physical deposition process, while AKD printing is a chemical modification process Signup and view all the answers

What is the primary function of the hydrophobic areas created by the AKD printing method in paper-based microfluidic devices?

To guide fluid flow through the device Signup and view all the answers

Which of the following properties of paper is the most important for its use in microfluidic devices?

Capillary action Signup and view all the answers

How does the AKD printing method modify the surface properties of the cellulose fibers in the paper?

It renders the fibers hydrophobic (contact angle 110°-125°) Signup and view all the answers

Which of the following is a key advantage of the wax printing fabrication method for paper-based microfluidic devices?

It can be completed within a few minutes Signup and view all the answers

What are the key factors that enable the spontaneous filling of capillaries and microchannels?

Adhesive/cohesive forces, surface tension, and Laplace pressure Signup and view all the answers

Which of the following is NOT a component of the capillary effect crucial for microfluidics?

Porosity Signup and view all the answers

In paper-based microfluidics, what materials are commonly used to manufacture Paper-based Analytical Devices (µPADs)?

Cellulosic materials like filter paper and chromatographic paper Signup and view all the answers

What is the minimum required content of α-cellulose in cellulosic materials used for manufacturing paper in microfluidics?

A minimum of 98% Signup and view all the answers

Which property of cellulosic paper makes it suitable for microfluidic applications?

Porous structure Signup and view all the answers

What role do Lateral Flow Strips (LFSs) play in the context of microfluidics?

They facilitate the filling of microchannels Signup and view all the answers