Liquid flow deposition of PbS thin films was studied using a custom-made flow reactor.

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Here, we report the use of the chemically modified one-step facile hydrothermal process to develop Boron (B), Nitrogen (N), and Phosphorous (P) doped carbon dots (E@CDs). The chemical characterization of the E@CDs was systematically studied by several analytical techniques that confer doping of elements by known characteristics. The obtained E@CDs had observed very homogeneous size distribution and displayed excitation dependent fluorescence properties, and high quantum yield (QY) was measured in case of B and N doping. Excellent cell viability and good cellular uptake was observed for all E@CDs. Finally, E@CDs were compared with pristine CDs on their effect on cell labelling, neural differentiation process and outgrowth of neurite network. By manipulating the doping of CDs, we can control the branching pattern and outgrowth of neuronal developments. The E@CDs are capable due to their photostability biocompatibility, and possible selective affinity towards nanomedicine applications.[a] Dr.

Chemical bath deposition (CBD) and its variant liquid flow deposition (LFD) are important and straightforward solution-based methods, and yet they rely on time-and resource-consuming serial experiments. In this work, we introduce a combinatorial approach for LFD (CLFD). A custom-made, open-top continuous flow reactor maintained uniform and constant deposition conditions, facilitating combinatorial investigation of deposition time by drawing the substrate using a dip coater. We demonstrate the use of CLFD for the deposition of PbS thin films, resulting in a discrete library of five deposition times (15−55 min) on a single GaAs (100) substrate. X-ray diffraction and scanning electron microscopy confirmed the formation of high-quality PbS films with a well-defined orientation and film thickness up to 6 microns at longer deposition times. The deposition rate, material quality, and growth mechanism of the films were similar to those obtained using CBD and LFD. The CLFD approach facilitates rapid parameter optimization, as demonstrated for a range of pH values (13.8−14.3) and two temperatures (25 and 30 °C). Thus, CLFD can potentially serve as a universal method for cost-effective research and optimization of solution-deposited thin films.

Lubrication performance of CuS nanoparticle additive in ester lubricant for the friction pair of ZrO 2 ball and copper plate was investigated under different electric potential conditions. When the potential of the copper plate is lower than −14 V, the friction coefficient decreases from 0.18 to 0.05 after an induction period of running-in, the time of which is shorter if the voltage is lower. The significant friction reduction is attributed to the excess of positively charged nanoparticles in the vicinity of the negatively charged surface.

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Epitaxial thin films of CdS were deposited from solution onto GaAs(100) and GaAs(111)B.

In situ synchrotron GIXD showed layer-by-layer growth in solution deposited monocrystalline thin films of lead sulfide on GaAs(111).