Publications by authors named "Xue-Sen Wang"

Article Synopsis
  • The study investigates the protective effects of four goji berry cultivars against retinal degeneration in a mouse model induced by NaIO, focusing on identifying the most effective cultivar.
  • Using various assays, researchers assessed visual function and retinal cell health while analyzing the compound profiles of the goji extracts.
  • Results showed that Ningqi No.1 cultivar was most effective at reducing oxidative stress and inflammation, making it the leading candidate for further investigation in retinal health treatments.
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Blue phosphorene (BlueP), a theoretically proposed phosphorous allotrope with buckled honeycomb lattice, has attracted considerable interest due to its intriguing properties. Introducing chirality into BlueP can further enrich its physical and chemical properties, expanding its potential for applications. However, the synthesis of chiral BlueP remains elusive.

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  • Researchers explored how magnetic molecules interact with surfaces for potential tech uses, focusing on the challenge of maintaining molecular spins on metallic substrates that often disrupt them.* -
  • Using scanning tunneling microscopy, they found that the Co-phthalocyanine molecule retains its spin on a semimetal called antimony, evidenced through strong Kondo resonance signals.* -
  • The study also revealed that magnetic moments in groups, like dimers or densely packed clusters, are preserved, indicating these molecular magnets could be valuable for high-density memory applications.*
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In order to investigate the genetic difference on medicinal components of Scutellaria baicalensis from different provenances on the genetic difference, the S. baicalensis provenance tests were arranged by randomized block design.Excavating the crude drugs that have been growing for three years, with the same drying process, the content of baicalin, baicalein, wogonoside, wogonin and laminarin A in S.

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  • The study measured growth data and active ingredient content in Scutellaria baicalensis using methods like HPLC and UV spectrophotometry.
  • After twice cutting the seedlings, the yield of stems and leaves was 193.60 and 63.21 kg/mu, with improved levels of active ingredients such as flavonoids and baicalin.
  • Regular cutting seedling is recommended as a new cultivation technique to enhance the quality and yield of medicinal materials, promoting better use of natural resources.
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We report the first-principle study on the recovery and linearization of Dirac cones in the electronic band structures of a few bilayer Sb(111) films (n-BL Sb) by surface modification. Due to the interaction between the surface states on the two surfaces of a free-standing film, the distorted Dirac cone in n-BL Sb(111) (n < 5) disappears. We demonstrate that the Dirac cone can be restored by functionalizing one surface with certain atoms including H, Ag, and Au, to reduce the inter-surface interaction.

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Topological insulators (TIs) are a new type of electronic materials in which the nontrivial insulating bulk band topology governs conducting boundary states with embedded spin-momentum locking. Such edge states are more robust in a two-dimensional (2D) TI against scattering by nonmagnetic impurities than in its three-dimensional (3D) variant, because in 2D the two helical edge states are protected from the only possible backscattering. This makes the 2D TI family a better candidate for coherent spin transport and related applications.

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  • * The study explores how the thickness of these films, ranging from 30 to 4 bilayers, affects the coupling between topological surface states (TSS) and their spin polarization.
  • * Results show that as the film thickness decreases, inter-surface coupling diminishes TSS spin polarization and introduces new scattering channels, although certain TSS remain spin-polarized without a gap at the Dirac point.
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Ultra-fine Au nanoparticles (NPs) show great application potential in catalysis. Size-tunable Au NPs have been fabricated on MoS(2) covered with monolayer 3,4,5,10-perylene tetracarboxylic dianhydride (PTCDA), and the morphological evolution as a function of Au deposition amount was investigated using scanning tunneling microscopy (STM). The PTCDA molecules act as a surfactant to stabilize ultra-fine Au NPs.

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The well-defined and patterned copper clusters formed on the Si(111)-(7 x 7) surface have been employed as a template for selective binding of 1,4-benzenedimethanethiol (HS-CH2-C6H4-CH2-SH, 1,4-BDMT), to form ordered molecular nanostructures. Scanning tunneling microscopic (STM) studies showed that each 1,4-BDMT molecule preferentially binds to two neighboring copper atoms within one copper cluster through the S-Cu interaction with its molecular plane parallel to the surface, whereas some 1,4-BDMT bond to individually adsorbed copper atoms, resulting in an upright configuration. Large-scale two-dimensional molecular nanostructures can be obtained using this patterned assembly technique.

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