keyword
https://read.qxmd.com/read/38496143/evaluation-of-osteoconductive-and-antimicrobial-properties-of-novel-graphene-on-dental-implants-an-in-vitro-study
#21
JOURNAL ARTICLE
Sounyala Rayannavar, Sunil Kumar Mv, Mahantesh Bembalgi, Swapnil Shankargouda, Aditya Acharya, Mallikarjun Doddamani, Vinuta Hiremath, Mehul A Shah
Introduction Graphene oxide (GO) has emerged as a promising material in dentistry, leveraging its exceptional properties. This study evaluates the physicochemical attributes of GO and elucidates its derived biological properties. These encompass biocompatibility, antibacterial efficacy, as well as its influence on osteogenic and odontogenic differentiation processes. Understanding the intricate interplay between the physicochemical and biological aspects of GO provides valuable insights into its potential applications in various dental contexts...
February 2024: Curēus
https://read.qxmd.com/read/38493406/bmscs-driven-graphite-oxide-grafted-carbon-fibers-reinforced-polyetheretherketone-composites-as-functional-implants-in-vivo-biosafety-and-osteogenesis
#22
JOURNAL ARTICLE
Wen Qin, Tong Xing, Shengnan Qin, Bin Tang, Weiyi Chen
Mesenchymal stem cells (MSCs) are increasingly becoming a potential treatment approach for bone injuries due to the multi-lineage differentiation potential, ability to recognize damaged tissue sites and secrete bioactive factors that can enhance tissue repair. The aim of this work was to improve osteogenesis of carbon fibers reinforced polyetheretherketone (CF/PEEK) implants through bone marrow mesenchymal stem cells (BMSCs)-based therapy. Moreover, bioactive graphene oxide (GO) was introduced into CF/PEEK by grafting GO onto CF to boost the osteogenic efficiency of BMSCs...
March 17, 2024: Journal of Biomaterials Science. Polymer Edition
https://read.qxmd.com/read/38491983/automatically-aligned-and-environment-friendly-twisted-stacking-terahertz-chiral-metasurface-with-giant-circular-dichroism-for-rapid-biosensing
#23
JOURNAL ARTICLE
Zongyuan Wang, Jianzhou Huang, Weiguang Liu, Chenjie Xiong, Bin Hu
Chiral metasurfaces are capable of generating a huge superchiral field, which has great potential in optoelectronics and biosensing. However, the conventional fabrication process suffers greatly from time consumption, high cost, and difficult multilayer alignment, which hinder its commercial application. Herein, we propose a twisted stacking carbon-based terahertz (THz) chiral metasurface (TCM) based on laser-induced graphene (LIG) technology. By repeating a two-step process of sticking a polyimide film, followed by laser direct writing, the two layers of the TCM are aligned automatically in the fabrication...
March 16, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38486380/quantum-confined-superfluidics-enabled-multiresponsive-mxene-based-actuators
#24
JOURNAL ARTICLE
Bo Ma, Jia-Nan Ma, Pu Song, Kai Wang, De-Min Zhang, Qiang Li, Qiang Zhang, Sheng-Bo Sang
MXene, renowned for its natural "quantum-confined-superfluidic" (QSF) channels, demonstrates superior electrical/thermal conductivity, favorable hydrophilicity, and remarkable mechanical strength, rendering it an ideal candidate for multiresponsive actuators, which are promising for soft electronics and robots. Currently, most MXene-based actuators are mainly prepared by combining an active layer and an inner layer, with only a few utilizing regulated QSF channels. However, tailoring QSF channels for multiresponsive actuators is extremely challenging...
March 14, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38484390/photocatalytic-activity-enhancement-of-nanostructured-metal-oxides-photocatalyst-a-review
#25
JOURNAL ARTICLE
Aini Ayunni Mohd Raub, Raihana Bahru, Mohd Ambri Mohamed, Rhonira Latif, Muhammad Aniq Shazni Mohammad Haniff, Khanom Simarani, Jumril Yunas
Nanostructured metal oxide semiconductors have emerged as promising nanoscale photocatalysts due to their excellent photosensitivity, chemical stability, non-toxicity, and biocompatibility. Enhancing the photocatalytic activity of metal oxide is critical in improving their efficiency in radical ion production upon optical exposure for various applications. Therefore, this review paper provides an in-depth analysis of the photocatalytic activity of nanostructured metal oxides, including the photocatalytic mechanism, factors affecting the photocatalytic efficiency, and approaches taken to boost the photocatalytic performance through structure or material modifications...
March 14, 2024: Nanotechnology
https://read.qxmd.com/read/38471069/interconnected-coni-se-hollow-flakes-through-reduced-graphene-oxide-sheets-as-a-cathode-material-for-hybrid-supercapacitors
#26
JOURNAL ARTICLE
Eslam Aboelazm, Cheng Seong Khe, Kwok Feng Chong, Mohamed Shuaib Mohamed Saheed, Mohamed Barakat Zakaria Hegazy
Achieving a high energy density and long-cycle stability in energy storage devices demands competent electrochemical performance, often contingent on the innovative structural design of materials under investigation. This study explores the potential of transition metal selenide (TMSe), known for its remarkable activity, electronic conductivity, and stability in energy storage and conversion applications. The innovation lies in constructing hollow structures of binary metal selenide (CoNi-Se) at the surface of reduced graphene oxide (rGO) arranged in a three-dimensional (3D) morphology (CoNi-Se/rGO)...
March 12, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38470782/a-photochemically-active-cu-2-o-nanoparticle-endows-scaffolds-with-good-antibacterial-performance-by-efficiently-generating-reactive-oxygen-species
#27
JOURNAL ARTICLE
Yushan He, Jun Zan, Zihui He, Xinna Bai, Cijun Shuai, Hao Pan
Cuprous oxide (Cu2 O) has great potential in photodynamic therapy for implant-associated infections due to its good biocompatibility and photoelectric properties. Nevertheless, the rapid recombination of electrons and holes weakens its photodynamic antibacterial effect. In this work, a new nanosystem (Cu2 O@rGO) with excellent photodynamic performance was designed via the in situ growth of Cu2 O on reduced graphene oxide (rGO). Specifically, rGO with lower Fermi levels served as an electron trap to capture photoexcited electrons from Cu2 O, thereby promoting electron-hole separation...
February 29, 2024: Nanomaterials
https://read.qxmd.com/read/38470730/in-situ-polymer-solution-processed-graphene-pdms-nanocomposites-for-application-in-intracranial-pressure-sensors
#28
JOURNAL ARTICLE
Hua Hong, Junjie Zhang, Yuchen Zhu, Stephen D Tse, Hongxuan Guo, Yilin Lai, Yubo Xi, Longbing He, Zhen Zhu, Kuibo Yin, Litao Sun
Polydimethylsiloxane (PDMS) has emerged as a promising candidate for the dielectric layer in implantable sensors due to its exceptional biocompatibility, stability, and flexibility. This study introduces an innovative approach to produce graphene-reinforced PDMS (Gr-PDMS), where graphite powders are exfoliated into mono- and few-layer graphene sheets within the polymer solution, concurrently forming cross-linkages with PDMS. This method yields a uniformly distributed graphene within the polymer matrix with improved interfaces between graphene and PDMS, significantly reducing the percolation threshold of graphene dispersed in PDMS from 10% to 5%...
February 21, 2024: Nanomaterials
https://read.qxmd.com/read/38469057/reduced-graphene-oxide-fibers-combined-with-electrical-stimulation-promote-peripheral-nerve-regeneration
#29
JOURNAL ARTICLE
Yuanyuan Zhao, Yang Liu, Cheng Lu, Daokuan Sun, Shiqi Kang, Xin Wang, Laijin Lu
BACKGROUND: The treatment of long-gap peripheral nerve injury (PNI) is still a substantial clinical problem. Graphene-based scaffolds possess extracellular matrix (ECM) characteristic and can conduct electrical signals, therefore have been investigated for repairing PNI. Combined with electrical stimulation (ES), a well performance should be expected. We aimed to determine the effects of reduced graphene oxide fibers (rGOFs) combined with ES on PNI repair in vivo. METHODS: rGOFs were prepared by one-step dimensionally confined hydrothermal strategy (DCH)...
2024: International Journal of Nanomedicine
https://read.qxmd.com/read/38457626/biocompatible-2d-materials-via-liquid-phase-exfoliation
#30
REVIEW
Yilin He, Andrés Felipe Andrade, Cécilia Ménard-Moyon, Alberto Bianco
Two-dimensional materials (2DMs), such as graphene, transition metal dichalcogenides (TMDs) and black phosphorus (BP), have been proposed for different types of bioapplications, owing to their unique physicochemical, electrical, optical and mechanical properties. Liquid phase exfoliation (LPE), as a one of the most effective up-scalable and size-controllable methods, is becoming the standard process to produce high quantity of various 2DM types as it can benefit of the use of green and biocompatible conditions...
March 8, 2024: Advanced Materials
https://read.qxmd.com/read/38456184/double-cross-linked-graphene-oxide-hydrogel-for-promoting-healing-of-diabetic-ulcers
#31
JOURNAL ARTICLE
Wenxu Liu, Yunfang Yang, Meiying Li, Jingxin Mo
This study explores the synthesis and characterization of a novel double cross-linked hydrogel composed of polyvinyl alcohol (PVA), sodium alginate (SA), graphene oxide (GO), and glutathione (GSH), henceforth referred to as PVA/SA/GO/GSH. This innovative hydrogel system incorporates two distinct types of cross-linking networks and is meticulously engineered to exhibit sensitivity to high glucose and/or reactive oxygen species (ROS) environments. A sequential approach was adopted in the hydrogel formation. The initial phase involved the absorption of GSH onto GO, which was subsequently functionalized with boric acid and polyethylene glycol derivatives via a bio-orthogonal click reaction...
2024: Frontiers in Chemistry
https://read.qxmd.com/read/38452225/enhancing-photothermal-photodynamic-therapy-for-glioblastoma-by-tumor-hypoxia-alleviation-and-heat-shock-protein-inhibition-using-ir820-conjugated-reduced-graphene-oxide-quantum-dots
#32
JOURNAL ARTICLE
Banendu Sunder Dash, Yu-Jen Lu, Jyh-Ping Chen
We use low-molecular-weight branched polyethylenimine (PEI) to produce cytocompatible reduced graphene oxide quantum dots (rGOQD) as a photothermal agent and covalently bind it with the photosensitizer IR-820. The rGOQD/IR820 shows high photothermal conversion efficiency and produces reactive oxygen species (ROS) after irradiation with near-infrared (NIR) light for photothermal/photodynamic therapy (PTT/PDT). To improve suspension stability, rGOQD/IR820 was PEGylated by anchoring with the DSPE hydrophobic tails in DSPE-PEG-Mal, leaving the maleimide (Mal) end group for covalent binding with manganese dioxide/bovine serum albumin (MnO2 /BSA) and targeting ligand cell-penetrating peptide (CPP) to synthesize rGOQD/IR820/MnO2 /CPP...
March 7, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38449436/nano-graphene-oxide-particles-induce-inheritable-anomalies-through-altered-gene-expressions-involved-in-oocyte-maturation
#33
JOURNAL ARTICLE
Sreelakshmi Krishnakumar, Raghunath Nair Malavika, Shantikumar V Nair, Deepthy Menon, Bindhu Paul-Prasanth
The inheritable impact of exposure to graphene oxide nanoparticles (GO NPs) on vertebrate germline during critical windows of gamete development remain undetermined to date. Here, we analyzed the transgenerational effects of exposure to nano-graphene oxide particles (nGO) synthesized in house with lateral dimensions 300-600 nm and surface charge of -36.8 mV on different developmental stages of germ cells (GCs): (1) during GCs undergoing early development and differentiation, and (2) during GCs undergoing gametogenesis and maturation in adulthood...
March 7, 2024: Nanotoxicology
https://read.qxmd.com/read/38444227/highly-sensitive-and-fast-responding-flexible-force-sensors-using-zno-znmgo-coaxial-nanotubes-on-graphene-layers-for-breath-sensing
#34
JOURNAL ARTICLE
Asad Ali, Jamin Lee, Kyoungho Kim, Hongseok Oh, Gyu-Chul Yi
We report the fabrication of highly sensitive, rapidly responding flexible force sensors using ZnO/ZnMgO coaxial nanotubes grown on graphene layers and their applications in sleep apnea monitoring. Flexible force sensors were fabricated by forming Schottky contacts to the nanotube array, followed by the mechanical release of the entire structure from the host substrate. The electrical characteristics of ZnO and ZnO/ZnMgO nanotube-based sensors are thoroughly investigated and compared. Importantly, in force sensor applications, the ZnO/ZnMgO coaxial structure resulted in significantly higher sensitivity and a faster response time when compared to the bare ZnO nanotube...
March 5, 2024: Advanced Healthcare Materials
https://read.qxmd.com/read/38443677/a-novel-electrochemical-immunosensor-for-sensitive-detection-of-depression-marker-apo-a4-based-on-bipyridine-functionalized-covalent-organic-frameworks
#35
JOURNAL ARTICLE
Yan Chen, Min Guo, Zixia Wang, Xiaohui Mo, Fangdi Hu, Yongling Du
A novel electrochemical immunosensor for detecting potential depression biomarker Apolipoprotein A4 (Apo-A4) was developed using a multi-signal amplification approach. Firstly, the sensor utilized a modified electrode material, NG-PEI-COF, combining bipyridine-functionalized covalent organic framework (COF) and polyethyleneimine-functionalized nitrogen-doped graphene (NG-PEI), providing high surface area and excellent electron transfer capability for the first-stage amplification in electrical signal conduction...
March 5, 2024: Mikrochimica Acta
https://read.qxmd.com/read/38437159/three-dimensional-graphene-sheet-carbon-veil-thermoelectric-composite-with-microinterfaces-for-energy-applications
#36
JOURNAL ARTICLE
Vamsi Krishna Reddy Kondapalli, Oluwasegun Isaac Akinboye, Yu Zhang, Guillaume Donadey, Justin Morrow, Kyle Brittingham, Ayush Arun Raut, Mahnoosh Khosravifar, Bashar Al-Riyami, Je-Hyeong Bahk, Vesselin Shanov
Over the years, various processing techniques have been explored to synthesize three-dimensional graphene (3DG) composites with tunable properties for advanced applications. In this work, we have demonstrated a new procedure to join a 3D graphene sheet (3DGS) synthesized by chemical vapor deposition (CVD) with a commercially available carbon veil (CV) via cold rolling to create 3DGS-CV composites. Characterization techniques such as scanning electron microscopy (SEM), Raman mapping, X-ray diffraction (XRD), electrical resistance, tensile strength, and Seebeck coefficient measurements were performed to understand various properties of the 3DGS-CV composite...
March 4, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38433142/differential-gene-expression-of-wharton-s-jelly-derived-mesenchymal-cells-mediated-by-graphene-oxide-in-basal-and-osteo-induced-media
#37
JOURNAL ARTICLE
Vun Vun Hiew, Peik Lin Teoh
BACKGROUND: Graphene oxide (GO) is widespread in scaffold engineering owing to its extraordinary properties such as multiple oxygen functional groups, high hydrophilicity ability and biocompatibility. It is known to promote differentiation in mesenchymal stem cells, but concomitant comparison of its modulation on the expression profiles of Wharton's jelly (WJ)-MSC surface markers, lineage differentiation, and epigenetic regulatory genes in basal and induced condition are still lacking...
March 3, 2024: Molecular Biology Reports
https://read.qxmd.com/read/38429076/3d-printed-conductive-hydrogel-patch-incorporated-with-msc-go-for-efficient-myocardial-infarction-repair
#38
JOURNAL ARTICLE
Tianxiao Mei, Hao Cao, Laihai Zhang, Yunfei Cao, Teng Ma, Zeyi Sun, Zhongmin Liu, Yihui Hu, Wenjun Le
Myocardial infarction (MI) results in an impaired heart function. Conductive hydrogel patch-based therapy has been considered as a promising strategy for cardiac repair after MI. In our study, we fabricated a three-dimensional (3D) printed conductive hydrogel patch made of fibrinogen scaffolds and mesenchymal stem cells (MSCs) combined with graphene oxide (GO) flakes (MSC@GO), capitalizing on GO's excellent mechanical property and electrical conductivity. The MSC@GO hydrogel patch can be attached to the epicardium via adhesion to provide strong electrical integration with infarcted hearts, as well as mechanical and regeneration support for the infarcted area, thereby up-regulating the expression of connexin 43 (Cx43) and resulting in effective MI repair in vivo ...
March 1, 2024: ACS Biomaterials Science & Engineering
https://read.qxmd.com/read/38427784/reprecipitation-a-rapid-synthesis-of-micro-sized-silicon-graphene-composites-for-long-lasting-lithium-ion-batteries
#39
JOURNAL ARTICLE
Yuto Katsuyama, Yang Li, Sophia Uemura, Zhiyin Yang, Mackenzie Anderson, Chenxiang Wang, Cheng-Wei Lin, Yuzhang Li, Richard B Kaner
Silicon microparticles (SiMPs) have gained significant attention as a lithium-ion battery anode material due to their 10 times higher theoretical capacity compared to conventional graphite anodes as well as their much lower production cost than silicon nanoparticles (SiNPs). However, SiMPs have suffered from poorer cycle life relative to SiNPs because their larger size makes them more susceptible to volume changes during charging and discharging. Creating a wrapping structure in which SiMPs are enveloped by carbon layers has proven to be an effective strategy to significantly improve the cycling performance of SiMPs...
March 1, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38421229/thermodynamic-analysis-of-silk-fibroin-graphite-hybrid-materials-and-their-morphology
#40
JOURNAL ARTICLE
Marlo Zorman, Christian Phillips, Chenyang Shi, Shuai Zhang, James De Yoreo, Jim Pfaendtner
Silk fibroin (SF) is a β-sheet-rich protein that is responsible for the remarkable tensile strength of silk. In addition to its mechanical properties, SF is biocompatible and biodegradable, making it an attractive candidate for use in biotic/abiotic hybrid materials. A pairing of particular interest is the use of SF with graphene-based nanomaterials (GBNs). The properties of this interface drive the formation of well-ordered nanostructures and can improve the electronic properties of the resulting hybrid...
February 29, 2024: Journal of Physical Chemistry. B
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