An organotrisulfide (RSSSR, R is an organic group) has three sulfur atoms which could be involved in multi-electron reduction reactions; therefore it is a promising electrode material for batteries. Herein, we use dimethyl trisulfide (DMTS) as a model compound to study its redox reactions in rechargeable lithium batteries. With the aid of XRD, XPS, and GC-MS analysis, we confirm DMTS could undergo almost a 4 e(-) reduction process in a complete discharge to 1.0 V. The discharge products are primarily LiSCH3 and Li2 S. The lithium cell with DMTS catholyte delivers an initial specific capacity of 720 mAh g(-1) DMTS and retains 82 % of the capacity over 50 cycles at C/10 rate. When the electrolyte/DMTS ratio is 3:1 mL g(-1) , the reversible specific energy for the cell including electrolyte can be 229 Wh kg(-1) . This study shows organotrisulfide is a promising high-capacity cathode material for high-energy rechargeable lithium batteries.
Bidirectional cell-cell communication involving exosome-borne cargo such as miRNA, has emerged as a critical mechanism for wound healing. Unlike other shedding vesicles, exosomes selectively package miRNA by SUMOylation of heterogeneous nuclear ribonucleoproteinA2B1 (hnRNPA2B1). In this work, we elucidate the significance of exosome in keratinocyte-macrophage crosstalk following injury. Keratinocyte-derived exosomes were genetically labeled with GFP reporter (Exo κ-GFP ) using tissue nanotransfection and were isolated from dorsal murine skin and wound-edge tissue by affinity selection using magnetic beads. Surface N-glycans of Exo κ-GFP were also characterized. Unlike skin exosome, wound-edge Exo κ-GFP demonstrated characteristic N-glycan ions with abundance of low base pair RNA and were selectively engulfed by woundmacrophages (ωmϕ) in granulation tissue. In vitro addition of wound-edge Exo κ-GFP to proinflammatory ωmϕ resulted in conversion to a proresolution phenotype. To selectively inhibit miRNA packaging within Exo κ-GFP in vivo, pH-responsive keratinocyte-targeted siRNA-hnRNPA2B1 functionalized lipid nanoparticles (TLNP κ ) were designed with 94.3% encapsulation *
A layer-by-layer (LbL) self-assembly of poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate)
(PEDOT–PSS) on lignocellulose wood microfibres was used to make conductive
fibres and paper. Polycations such as poly(allylamine hydrochloride) (PAH), and
poly(ethyleneimine) (PEI) were used in alternate deposition with anionic conductive
polythiophene (PEDOT–PSS) to construct the multilayer nanofilms on wood microfibres.
Current–voltage characterization was measured on single fibres using a Keithley
probe measurement system after deposition of every PEDOT–PSS monolayer to
study the electrical properties of the coating. The conductivity of the microfibres
increased linearly with increasing number of bilayers of PEDOT–PSS/polycation.
The measured conductivities of the coated microfibres ranged from 1 to
10 S cm−1. It was also observed that the conductivity of the fibres (i.e., coating of PEDOT–PSS)
depends upon the type of polycations used to alternate with the polythiophene. In this
work we have demonstrated successful scale integration from nano to micro and macroscale
(nanocoating–microfibres–macropaper) in developing new paper material. The conductive
paper that has been produced (and its fabrication method) can be used for the
development of smart paper technology on monitoring of electrical, and optical/electrical
signals.
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