Colorimetric paper-based analytical devices

Paper microzone assay embedded on a 3D printed support for colorimetric quantification of proteins in different biological and food samples

“…[5][6][7][8][9][10][11] PADs are a class of "lab-on-chip" sensors mainly made of cellulosic materials in which one or more hydrophilic regions (detection zone or microzone) are patterned by the creation of impermeable barriers, in order to delimitate an analytical zone in which a specic assay is to be performed. 12 The optimization of an analytical assay in a PAD has been proven to have several advantages when compared to conventional approaches. PADs are portable, disposable, customizable and user-friendly.…”

Innovative, Flexible, and Miniaturized Microfluidic Paper-Based Plasmonic Chip for Efficient Near-Infrared Metal Enhanced Fluorescence Biosensing and Imaging

“…The most common analytical detection techniques implemented in microfluidic paper-based devices are colorimetric readouts, electrochemistry, fluorescence, and chemi-, electrochemi-, and bioluminescence. , The integration of metallic nanoparticles in the structure of the microfluidic paper-based devices has led to remarkable properties and sensing abilities . In particular, anisotropic nanostructures are of great interest for such applications considering their unique optical properties related to the localized surface plasmon resonance (LSPR), which makes them highly sensitive to the dielectric environment in their close vicinity.…”

“…9 Paperbased platforms have been employed in various applications from chemical analysis like chromatography 10 and electrophoresis 11 to diagnostics, 12,13 and sensing tools. 14 The most common analytical detection techniques implemented in microfluidic paper-based devices are colorimetric readouts, 15 electrochemistry, 16 fluorescence, 17 and chemi-, electrochemi-, and bioluminescence. 18,19 The integration of metallic nanoparticles in the structure of the microfluidic paper-based devices has led to remarkable properties and sensing abilities.…”