TEST STRIPS FOR VISUAL DIFFERENTIATION OF LIQUID MIXTURE COMPOSITION

摘要

A test strip device exhibits visual changes, such as color changes, when there is a only slight difference in the composition of liquids such as gasoline, oil, ethanol and water. Such a slight liquid composition difference usually requires a sophisticated and expensive instrument to differentiate. The test strip consists of one and more than one inverse opal films deposited on a substrate and achieves this goal of differentiation in a simple, fast and energy-free manner.

主权项

1. A test strip, comprising:
a first substrate; at least one inverse opal film deposited on the first substrate, said inverse opal film having a specific neck angle for tuning the wettability of said inverse opal film; at least one chemical coating deposited inside the pores of the at least one inverse opal film.