Abstract: The invention provides apparatus for the quantitative analysis of an analyte in a sample, comprising (i) a solid phase; and (ii) a detector, wherein the surface of the solid phase comprises (a)a first position for sample application, and (b)a second position, distant from the first position, wherein a first molecule that binds to the analyte and is capable of releasing a detectable species is either deposited at the first position or is added to the sample prior to application to the LF membrane, and wherein a second molecule that binds to the analyte is immobilised at the second position, and wherein an enzyme is immobilised, co-located with the immobilised molecule at the second position, and wherein the detector is located in close proximity to the immobilised molecule at the second position.

Abstract: The present invention relates to a method for the production of cross-linked carbon nanotube networks which are selected from aerogels and xerogels with improved performance and characteristics thereof. The invention is also concerned with carbon nanotube networks which are selected from aerogels and xerogels produced by such processes and uses thereof.