This can be termed as a breakthrough invention in the field of nanotechnology. A protein sensor has been developed by U.S researchers which are ultra sensitive and can detect changes in concentration which are more than five orders of magnitude. In a number of biosensors there is an increased dependency on changes in intensity of fluorescence emitted which is difficult to measure and therefore University of Michigan researchers headed by Nicholas Kotov have come up with a device in which case the wavelength of the emitted light shifts reversibly.
The device has been created using gold nanoparticles which are attached to nanowires with the aid of molecular springs which carry protein binding antibodies. When the target protein attaches to the antibody it leads to the extension of the molecular spring and moves the nanospheres away from nanowires which leads to the reduction of interaction between sphere and wire. As a result a significant change in the wavelength of light emitted from nanowire was witnessed which could be deployed as molecule specific biosensor.
