The ability of carbon dots (CDs) to emit afterglow emission in addition fluorescence response UV-to-visible excitation allows them be a new class luminescent materials. When compared with traditional organic or inorganic materials, CDs have set advantages, including small size, ease synthesis, and absence highly toxic metal ions. In addition, high dependence their color output on temperature, w...

Among the solid electrolytes for solid-state Li batteries, polymer are actively explored on basis of good interfacial contact and easy making, while it is still constrained by slow ionic transport low lithium ion transference number. Herein, functional carbon dots-based Li+ conductor (CD-Li) designed to improve dynamics selectivity in polyethylene oxide (PEO) electrolyte. High conductivity (1.0...

Silica aerogels functionalized with strongly fluorescent carbon quantum dots were first prepared and used for simple, sensitive, and selective sensing of NO2 gas. In the presence of ethanol, homemade silica aerogels with a large specific surface area of 801.17 m(2)/g were functionalized with branched polyethylenimine-capped quantum dots (BPEI-CQDs) with fluorescence quantum yield higher than 40...

A 0.4 mm long semiconducting single-walled carbon nanotube is doped into n type by potassium ~K! vapor. Electrical measurements of the doped nanotube reveal single-electron charging at temperatures up to 160 K. The K-doped sample manifests as a single quantum dot or multiple quantum dots in series depending on the range of applied gate voltage. This is explained by an inhomogeneous doping profi...

We report photoluminescence (PL) measurements on self-assembled GaSb/GaAs quantum dots. As the laser excitation is increased from very low levels, the PL shows a strong red shift, and then a blue shift, such that it presents a U-shaped curve. Raising the temperature causes a large s,100 meVd blue shift of the PL, and shifts the minimum of the PL energy versus laser excitation curve to higher la...