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Here, graphitic circuitry is created on the paper-based microfluidic device by repeatedly sketching with a pencil. [55] [56] [57] For example, this electrical integration method was used in a completely hand-drawn paper microfluidic device for point-of-care cancer screening. [57]
Microfluidic techniques such as droplet microfluidics, paper microfluidics, and lab-on-a-chip are used in the realm of food science in a variety of categories. [134] Research in nutrition, [ 135 ] [ 136 ] food processing, and food safety benefit from microfluidic technique because experiments can be done with less reagents.
Microfluidics refers to the flow of fluid in channels or networks with at least one dimension on the micron scale. [1] [2] In open microfluidics, also referred to as open surface microfluidics or open-space microfluidics, at least one boundary confining the fluid flow of a system is removed, exposing the fluid to air or another interface such as a second fluid.
Paper has been used in analytical chemistry as far back as the 1800s, when litmus paper was first reported, and has since been used for techniques such as paper chromatography and lateral flow assays. [3] However, it was only identified as a material for microfluidic assays in 2007, when patterned paper was proposed as a low-cost platform for ...
Planar chromatography is a separation technique in which the stationary phase is present as or on a plane. The plane can be a paper, serving as such or impregnated by a substance as the stationary bed (paper chromatography) or a layer of solid particles spread on a support such as a glass plate (thin-layer chromatography).
Paper chromatography is one method for testing the purity of compounds and identifying substances. Paper chromatography is a useful technique because it is relatively quick and requires only small quantities of material. Separations in paper chromatography involve the principle of partition.