This research explores the desorption mechanism and thermal stability of octadecyl trichlorosilane (OTS, CH3(CH2)17SiCl3) coating on quartz slides and in alkali-metal vapor cells. We measured systematically the morphological thermal-changes, energy dissipation diversity and anti-relaxation characteristic of OTS coatings before and after exposure to Cs atoms by Fourier transform infrared spectroscopy (FTIR), water contact angle measurement, atomic force microscopy (AFM) imaging, collision energy dissipation analysis, and free induction decay (FID) of Cs atoms. The results show that the OTS coatings exhibit the best thermal stability under the specific process conditions, and the homogeneous and dense structure makes the adsorption of alkali metal atoms more stable, which effectively reduces surface energy dissipation and prolongs the relaxation time of Cs atoms. The study provides certain reference for efficient anti-relaxation coating fabrication and coated cell application.

Multi-needle electrospinning is a simple and general method for mass preparation of nanofiber membranes, which has great industrial potential. However, due to the bending instability produced in the process of electrospinning, the deposition uniformity of the nanofibers has been very worrying, resulting in uneven nanofiber films, which seriously affects the batch application of electrospinning films in environmental filtration, new energy and medical fields. In order to improve the uniformity of nanofiber deposition in multi-needle electrospinning, we propose an auxiliary flow field system (AFF), which can effectively improve the non-uniformity of nanofiber deposition. After image processing of electrospun nanofiber films, we quantified the uniformity of fiber deposition with the index of gray distribution, and verified the effectiveness of this method. Combined with the multi-physical field analysis of the experimental model, the influence mechanism of cross-wind field on the uniformity of fiber deposition was revealed. By optimizing the experimental parameters, the non-uniformity of nanofiber deposition was reduced by 49. 19%.

This study aimed to increase the antioxidant potential of Scopoletin by utilizing green synthesis to create gold and silver nanoparticles. Pure Scopoletin was obtained from the aerial parts of S. mollis and identified using spectroscopic techniques The synthesized AuNPs and AgNPs were characterized using UV-visible spectroscopy, FT-IR spectroscopy, and scanning electron microscopy (SEM). The results indicated that the gold nanoparticles had diameters ranging from 58 to 81 nm, while the silver nanoparticles were spherical in shape with diameters ranging from 75 to 89 nm. The radical scavenging capacity of Scopoletin, AuNPs, and AgNPs was evaluated using the DPPH method. The highest radical scavenging capacity was exhibited by AgNPs, with a percentage inhibition of 76.114 ± 0.030% at a concentration of 400 µg/ml. In comparison, the highest radical scavenging capacity of AuNPs was 65.924 ± 0.018%, while the native compound showed weak activity at 16.641 ± 0.0955% at the same concentration. The results demonstrated an improved radical scavenging capacity of AgNPs and AuNPs, with ratios five and four times higher, respectively, compared to pure Scopoletin at the same concentration level. These findings suggest potential biomedical applications for the synthesized nanoparticles.

The combination of chemotherapy and photothermal therapy shows great potential to achieve synergistic anti-tumor effect. However, it is still a great challenge to design stimuli responsive drug release systems with integrated photothermal/chemotherapy functions. In this paper, novel rod-like carbon nanomaterials (RCNs) were prepared by soft template hydrothermal method with glucose as raw materials, which were proved to have good biocompatibility, excellent drug-loading capacity and high photothermal efficiency. After that, RCNs we used to load doxorubicin (DOX) for integrated photothermal/chemotherapy toward cancer, which demonstrated good treatment efficiency under NIR irradiation. Our approach provided a novel NIR-responsive nano platform for combined photothermal/chemotherapy toward cancer, which was considered to be of great potential in anticancer applications.

The quasi-Z-source H-bridge grid-connected inverter (QHGCI) is well known with its advantages of the void of shoot-through problem and the high DC-voltage utilization. But the existence of the common-mode leakage current in the power frequency cycle, lower power density and higher thermal stress makes it hardly applicable to the grid-penetrating application. Thus with a purpose to conquer the problem relating to the QHGCI, an innovative transformerless Z-Source photovoltaic grid-connected inverter with coupled inductor coil (TZPGCI-CIC) is proposed. The circuitry topology and an unipolar SPWM strategy are firstly introduced in short. And thereafter the common-mode voltage in the whole working process is derived and evaluated through the detailed operating mode analysis, in which a constant value of it has been theoretically revealed. Lastly, a prototype platform of TZPGCI-CIC is setup and its good performance on leakage current suppression, lower thermal stress are validated with the experimental results.

Binary Solvent Extraction of Microplastics from a Complex Environmental Matrix.Oluniyi O. Fadare1, Leisha Martin2, Nigel Lascelles1, Jessica T. Myers1, Karl Kaiser3, Wei Xu2, and Jeremy L. Conkle11Department of Physical & Environmental Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Unit 5892, Corpus Christi, Texas 78412, United States.2Department of Life Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Unit 5892, Corpus Christi, Texas 78412, United States3Department of Marine and Coastal Environmental Science, Texas A&M University at Galveston, Galveston, TX 77553, United StatesAddress correspondence to Jeremy L. Conkle - Department of Physical and Environmental Sciences, Texas A&M University, Corpus Christi, 6300 Ocean Drive, 78412, Texas, United States. Tel: +1 361.825.2862; Email: [email protected]