Single nanoparticle studies of charge trapping and de-trapping in core/shell CdSe/ZnS nanocrystals incorporated into an insulating matrix and subjected to an external electric field demonstrate the ability to reversibly modulate the exciton dynamics and photoluminescence blinking while providing indirect evidence for the existence of a permanent ground state dipole moment in such nanocrystals. ...

The electrostatic properties of individual CdSe nanocrystals are directly measured using electrostatic force microscopy (EFM) in dry air at room temperature. We determine that the static dielectric constant of CdSe nanocrystals with diameters 5 nm is uniform. However, the charge per nanocrystal is nonuniform, with some nanocrystals possessing a positive charge. Furthermore, a small fraction of ...

Artefacts are noises introduced to the electroencephalogram’s (EEG) signal by not central nervous system (CNS) sources of electric fields inside and outside subject’s body. The artefacts impede the analysis of the signal and should be handled properly. The most common and characteristic kind of artefacts is the electrooculographic (EOG) ones, especially subject’s eye-blinking artefacts. In this...

This paper proposes a new approach to real-time robot controlling by integrating an Electrooculography (EOG) measuring device within humanrobot interaction (HRI). Our study focuses on controlling robots using EOG for fulfilling elementary robot activities such as basic motor movements and environment interaction. A new EOG-based HRI paradigm has been developed on the specific defined problem of...

We present an integrin labeling method using functionalized quantum dots (QDs). Cyclic Arg-Gly-Asp (RGD) peptides and a biotin-streptavidin linkage are used to specifically couple individual QDs to integrins of living cells. The spacer distance between the RGD sequence and the QD surface is a crucial parameter to ensure specific binding to individual alpha(v)beta(3) integrins of osteoblast cell...

This paper describes a human blinking eye-on-a-chip microdevice that reconstitutes the ocular surface in the human eye. To recapitulate the structural complexity of the ocular surface, we micro-patterned human cells derived from the cornea and conjunctiva on dome-shaped three-dimensional (3D) scaffolds in in vivo-like spatial arrangements. Moreover, this system was integrated with electromechan...

Nitrogen-vacancy colour centres in diamond can undergo strong, spin-sensitive optical transitions under ambient conditions, which makes them attractive for applications in quantum optics, nanoscale magnetometry and biolabelling. Although nitrogen-vacancy centres have been observed in aggregated detonation nanodiamonds and milled nanodiamonds, they have not been observed in very small isolated n...

Accumulating evidence from pharmacology, neuroimaging, and genetics indicates that striatal dopamine influences time perception [1-5]. Despite these converging results, it is not known whether endogenous variations in dopamine underlie transient fluctuations in our perception of time. Here, we exploited the finding that striatal dopamine release is associated with an increase in spontaneous eye...