A device consisting activated microfibers, such as glass and cellulose, comprising the 3D network, packed in small volumes, traps and concentrates the bacteria from trace contaminated liquids rapidly. It functions for concentrating and rapid detection of microbes in 20 min. The device enables the easy recovery of concentrated bacteria, which involves the mixing and agitation of the contaminated sample, followed by the suction. The chemistry of the system involves coupling aminosilane groups such as 3-aminopropyl methyldiethoxysilane (APMDES) or carboxylated groups in 3-triethoxysilyl propylsuccinicanhydride (TESPSA) to the —OH bearing moieties on the surfaces of glass and/or cellulose microfibers, attained by solution or vapor phase techniques. The device has a wide variety of applications, including rapid detection of trace bacteria in contaminated liquids; in vegetable, fruit, meat, tabletop and countertop wash-offs; and in the filtration of liquids (water or fuels) to remove bacteria or other microorganisms.
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