The ACS NANO (ISI Thomas Reuters impact factor = 11.421) publishes the paper "Large Enhancement of Nonlinear Optical Response in a Hybrid Nanobiomaterial Consisting of Bacteriorhodopsin and Cadmium Telluride Quantum Dots"

The paper describes a new physical effect appearing when biological molecules (photosensitive proteins) come into contact with the surface of nanomaterials. The effect found in the study will lay the basis for the development of novel nano–bio hybrid materials with advanced nonlinear properties.

The ACS NANO, one of the world's most reputable journals in the field of nanotechnologies, has published a paper by Dr. Alyona Sukhanova and Prof. Igor Nabiev of LNBE and their German, Irish, and Spanish colleagues. The paper presents experimental data on the nonlinear optical properties of a nano–bio hybrid system based on the photosensitive membrane protein bacteriorhodopsin and semiconductor nanoparticles.

The study dealt with nonlinear photoreflection in a hybrid material engineered from the membrane protein bacteriorhodopsin and cadmium telluride nanoparticles (quantum dots). Such systems are interesting in that they combine the unique photophysical properties of protein molecules and semiconductor nanoparticles. Linking them into a single system results in resonance enhancement of certain physical properties of the whole conjugate.

The study has shown that the self-organized protein–nanoparticle system displays exceptionally strong nonlinear properties in the near-IR region. In particular, its nonlinear reflection coefficient is more than 4000% higher than that of each individual component. The resonance nature of the discovered effect is its distinctive characteristic.

The results of the experiments have allowed the authors to put forward a model assuming that the nanoparticles nonlinearly absorb the exciting radiation and then transfer its energy to the protein through nonradiative Förster resonance energy transfer.

The discovered effect will serve as the basis for the development of novel nano–bio hybrid materials with advanced nonlinear properties.


Prof. Igor Nabiev, PhD, DSc (,

Leading Scientist of the Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute, 31 Kashirskoe shosse, 115409 Moscow, Russian Federation

The «ACS NANO» website:

The ACS NANO, with its record impact factor of 11.421, is the world's fifth most cited journal in the Nanoscience field and the ninth most cited one in the Chemistry field.

© 2012 Laboratory of Nano-BioEngineering