When electronically excited CO(a(3)Π) collides with a Au(111) surface, electron emission can be observed with a quantum efficiency of 0.13. We have studied the influence of Ar, Kr and Xe adsorption on the electron emission efficiency resulting from CO(a(3)Π) quenching. Surprisingly, a single monolayer (ML) of rare gas dramatically enhances electron emission. For Ar and Kr bilayers, emission eff...

An electrostatics-based approach has been proposed for probing the weak interactions between lone pair containing molecules and π deficient molecular systems. For electron-rich molecules, the negative minima in molecular electrostatic potential (MESP) topography give the location of electron localization and the MESP value at the minimum (Vmin) quantifies the electron-rich character of that reg...

As fluorescence bioimaging has increased in popularity, there have been numerous reports on designing organic fluorophores with desirable properties amenable to perform this task, specifically emission the near-infrared II (NIR-II) region. One such strategy is utilize donor−π–acceptor−π–donor approach (D−π–A−π–D), as allows for control of photophysical resulting through modulation highest occup...

This report contains the Proceedings of the joint CARE-HHH-APD, CARE ELAN, and EUROTEV-WP3 Mini-Workshop on ‘Electron Cloud Clearing Electron Cloud and Technological Consequences’, “ECL2”, held at CERN in Geneva, Switzerland, 1-2 March 2007). The ECL2 workshop explored novel technological remedies against electron-cloud formation in an accelerator beam pipe. A primary motivation for the worksho...

A fully non-fused electron acceptor BO-4T with condensed π–π stacking and obvious face-on orientation was developed. The D:A pairing principles for NFREA-based OSCs were explored PM6 works the best BO-4T.

Electron cloud is one of the leading mechanisms that limit the performance of high intensity circular accelerators and colliders. In the Relativistic Heavy Ion Collider, multibunch electron cloud effects are observed both in the warm region and super-conducting region when the number of ion bunches and their intensities are raised beyond the design values. Vacuum-pressure rises, transverse tune...

034402-1 Low-energy, background electrons are ubiquitous in high-energy particle accelerators. Under certain conditions, interactions between this electron cloud and the high-energy beam can give rise to numerous effects that can seriously degrade the accelerator performance. These effects range from vacuum degradation to collective beam instabilities and emittance blowup. Although electron-clo...

The co-adsorption of trinitrotoluene (TNT), a typical π-electron acceptor, and triphenylene (TP), a typical π-electron donor, on a Au(111) surface was investigated by in situ Electrochemical Scanning Tunneling Microscopy (ECSTM). DFT calculations proved that parallelly stacked and well-overlapped TP and TNT molecules can form Donor-Acceptor dyads through intermolecular π-π charge transfer, whic...