Surface states matters (Carbon 183, 2021, 1)

Nitrogen-doped carbon quantum dots are synthesized by a one-step atmospheric pressure microplasma process. The origin of the observed photoluminescence emission and its relationship with nitrogen doping is studied using a range of optical and chemical measurements along with verification by theoretical calculations (Carbon 183, 2021, 1).

Carrier extraction from metallic perovskite (Nanoscale 13, 2021, 12271)

We observe the extraction of carriers in a perovskite oxide with metallic behaviour and high conductivity, whilst also displaying broad absorption across the ultraviolet, visible, and near-infrared spectral regions, making it an attractive material for solar energy conversion. Furthermore, the optoelectronic properties of strontium niobate can easily be tuned by varying the Sr fraction or through doping (Nanoscale 21, 2021, 12271).

Understanding plasma-ethanol interactions (Green Chemistry 23, 2021, 3983)

Plasma-electrochemistry has been successfully used to synthesize a range of metal–oxide nanoparticles and quantum dots (QDs). While nanoparticles and QDs can be an end to this process, they can also be viewed as ‘chemical probes’ that help understanding the underlying and progenitor chemical reactions. We have therefore studied plasma–ethanol interactions during the synthesis of CuO QDs (Green Chemistry 23, 2021, 3983).

Copper nanoparticles & CNT composite materials (Nanoscale Adv 3, 2021, 781)

Copper nanoparticles (Cu-NPs) represent a viable low-cost alternative to replace bulk copper or other more expensive NPs (e.g. gold or silver) in various applications. This study deals with the synthesis of well dispersed Cu-NPs by using an Ar + H2 microplasma using a solid copper precursor.The Cu-NPs were successfully deposited onto porous carbon nanotube ribbons; surface coverage and the penetration depth of the Cu-NPs inside the CNT ribbon structure were investigated as these can be beneficial for a number of applications (Nanoscale Advanced 3, 2021, 781).

Band energy of c-Si and a-Si nanoparticles (Faraday Discussions 222, 2020, 390)

The relationship between the crystallization process and opto-electronic properties of silicon quantum dots (Si QDs) synthesized by atmospheric pressure plasmas (APPs) is studied in this work. We measure the ultraviolet-visible optical properties and electronic properties through various techniques, build an energy level diagram for the valence electrons region as a function of the crystallinity of the QDs, and finally discuss the integration of these as active layers of all-inorganic solar cells (Faraday Discussions 222, 2020, 390).

Solar-thermal energy conversion with NPs (Solar Energy 203, 2020, 37)

Nanofluids comprised of nanoparticles in ethylene glycol have been prepared. The energy absorptive properties of the prepared nanofluids were investigated as a potential additive to the traditional working fluids used in solar thermal collectors. The application feasibility has been assessed by calculating a value of power which could be transferred to the thermal
fluid (Solar Energy 203, 2020, 37).

OH-terminated ZnO QDs (Nanotechnology 31, 2020, 215707)

Strongly confined ligand-free, defect-free, hydroxy terminated ZnO quantum dots with a mean diameter of 1.9 nm were synthesized by radio frequency atmospheric pressure microplasma. Photoluminescence studies show strong confinement effect on emission with only ultraviolet (UV) emission without any defect-related visible emission. The mechanism responsible for this UV emission is also discussed and originates from OH-related surface terminations (Nanotechnology 31, 2020, 215707).