IOP Publishing, Nanotechnology, 19(27), p. 195701, 2016
DOI: 10.1088/0957-4484/27/19/195701
Full text: Unavailable
Abstract HydrophobinVmh2 is a small amphiphilic protein, which self-assembles on different surfaces and naturally interacts with glucose. Here, we report on the synthesis of a nanobiocomplex made of polyethylene glycol, Vmh2 and gold nanoparticles by a one-step process and on its ability to recognise glucose in an aqueous solution at 0.3–0.6–1.2 mg ml−1 concentrations. Even though the Vmh2 proteins are intrinsically bonded to the gold core, effective glucose interaction monitoring was demonstrated by using dynamic light scattering, ultraviolet–visible, polarization-modulated infrared reflection–absorption and x-ray photoelectron spectroscopies. Experimental results highlighted an affinity constant of 7.3 ± 0.3 mg ml−1 between the nanobiosystem and the sugar, and a detection sensitivity of 0.13 ± 0.06 a.u./mg ml−1.