The great potential of employing tight-binding approximations after a regular DFT ground state calculation has been demonstrated in a recent paper. With the TD-DFT+TB approach (see thesis by Robert Rüger), plasmon resonances in large silver, gold,...
The DIM/QM method for modeling plasmon-enhanced photochemical properties has recently been extended to several non-linear optical properties with damped cubic response theory. A recent paper by Zhongwei Hu and Lasse Jensen discusses the methods to...
Raman optical activity has proven to be a powerful tool for probing the geometry of small organic and biomolecules, but the fledgling technique of surface-enhanced Raman optical activity (SEROA) remains an experimental challenge. SEROA of...
In two recent papers, researchers from Trieste and Pisa studied the optical properties of silver and gold nanoparticles. The fundamental study on silver nanoshells showed that plasmonic features emerge at shells as small as 92 atoms....
Morton and Jensen from Penn State have developed a frequency-dependent QM/MM method, the discrete interaction model/quantum mechanics (DIM/QM) model, with which optical properties of molecules adsorbed on surfaces of nanoparticles can be studied. The response...
ADF developer Johannes Neugebauer and his co-workers have showcased new methodologies within the Frozen-Density Embedding (FDE) framework. With FDE, much larger systems can be studied than with traditional DFT. Furthermore, as densities can be localized...