Metal–Organic Coordination Polymer to Prepare Density Controllable and High Nitrogen-Doped Content Carbon/Graphene for High Performance Supercapacitors

Design and preparation of carbon-based electrode material with high nitrogen-doping ratio and appropriate density attract much interest for supercapacitors in practical application. Herein, three porous carbon/graphene (NCG_Cu, NCG_Fe, and NCG_Zn) with high doping ratio of nitrogen have been prepared via directly pyrolysis of graphene oxide (GO)/metal–organic coordination polymer (MOCP) composites, which were formed by reacting 4,4′-bipyridine (BPD) with CuCl₂, FeCl₃, and ZnCl₂, respectively. As-prepared NCG_Cu, NCG_Fe and NCG_Zn showed high nitrogen doping ratio of 10.68, 12.99, and 11.21 at. %; and high density of 1.52, 0.84, and 1.15 g cm^–3, respectively. When as-prepared samples were used as supercapacitor electrodes, NCG_Cu, NCG_Fe and NCG_Zn exhibited high gravimetric specific capacitances of 369, 298.5, 309.5 F g^–1, corresponding to high volumetric specific capacitances of 560.9, 250.7, 355.9 F cm^–3 at a current density of 0.5 A g^–1, as well as good cycling stability, nearly 100% of the capacitance retained after 1000 cycles even at a large current density of 10 A g^–1. It is expected that the provided novel strategy can be used to develop electrode materials in high performance energy conversion/storage devices

High-Performance Biomass-Based Flexible Solid-State Supercapacitor Constructed of Pressure-Sensitive Lignin-Based and Cellulose Hydrogels

Employing renewable, earth-abundant, environmentally friendly, low-cost natural materials to design flexible supercapacitors (FSCs) as energy storage devices in wearable/portable electronics represents the global perspective to build sustainable and green society. Chemically stable and flexible cellulose and electroactive lignin have been employed to construct a biomass-based FSC for the first time. The FSC was assembled using lignosulfonate/single-walled carbon nanotube_HNO₃ (Lig/SWCNT_HNO₃) pressure-sensitive hydrogels as electrodes and cellulose hydrogels as an electrolyte separator. The assembled biomass-based FSC shows high specific capacitance (292 F g^–1 at a current density of 0.5 A g^–1), excellent rate capability, and an outstanding energy density of 17.1 W h kg^–1 at a power density of 324 W kg^–1. Remarkably, the FSC presents outstanding electrochemical stability even suffering 1000 bending cycles. Such excellent flexibility, stability, and electrochemical performance enable the designed biomass-based FSCs as prominent candidates in applications of wearable electronic devices

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Additional file 1: of First identification of kdr allele F1534S in VGSC gene and its association with resistance to pyrethroid insecticides in Aedes albopictus populations from Haikou City, Hainan Island, China

Multilingual abstract in the six official working languages of the United Nations. (PDF 370 kb

Additional file 2: Table S1. of First identification of kdr allele F1534S in VGSC gene and its association with resistance to pyrethroid insecticides in Aedes albopictus populations from Haikou City, Hainan Island, China

kdr genotypes of Aedes albopictus populations from pyrethroid larval bioassay groups in Haikou City, Hainan Island, China. Table S2 Frequencies of kdr genotypes in relation to mosquito survival phenotype determined by the deltamethrin and DDT susceptibility adult bioassay in Aedes albopictus populations in Haikou City, Hainan Island, China (ZIP 28 kb

ORP8 interacts with Nup62.

<p><b>A</b> Bimolecular fluorescence complementation (BiFC) analysis of ORP8 interaction with Nup62. HuH7 cells were cotransformed for 24 h with plasmids encoding the fusion proteins Nup62/pVn-C1 and ORP8/pVc-C1 or ORP8pVc-N1 (indicated on the left) for 24 h, followed by 48 h incubation with 10 µg/ml cycloheximide. ER-DsRed2 was contransfected as a transfection control and ER marker. BiFC (GFP channel) and DsRed fluorescence were imaged (identified at the top). Bar, 10 µm. <b>B</b> Lysate of untransfected HuH7 cells was immunoprecipitated with anti-ORP8 (identified at the top) or an irrelevant control IgG, followed by Western blot analysis with anti-Nup62 (top panel) or anti-ORP8 (bottom panel). H, IgG heavy chain.</p

The ORP8 ligand-binding domain binds cholesterol.

<p><b>A</b> The purified His₆-ORP8 ORD preparation, Coomassie blue stained SDS-PAGE gel. The two major bands (indicated, ORP8) represent the ORP8 ORD fusion protein. <b>B</b> The ability of His₆-ORP8 ORD to extract [³H]cholesterol from unilamellar PC∶cholesterol (99∶1 mol%) vesicles was assayed. Purified GST was used as a negative control. Each assay contained 9.9 nmol PC and 100 pmol cholesterol; The protein amounts used (25–100 pmol) are indicated at the bottom. The data represents % of total DPM extracted from the vesicles, a mean ± s.e.m. (GST, n = 4; His₆-ORP8 ORD, n = 5).</p