keyword
https://read.qxmd.com/read/38427784/reprecipitation-a-rapid-synthesis-of-micro-sized-silicon-graphene-composites-for-long-lasting-lithium-ion-batteries
#21
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
#22
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
https://read.qxmd.com/read/38410916/extrinsic-pseudocapacitive-nise-rgo-g-c-3-n-4-nanocomposite-for-high-performance-hybrid-supercapacitors
#23
JOURNAL ARTICLE
Somnath R Khaladkar, Oshnik Maurya, Girish Gund, Bhavesh Sinha, Deepak Dubal, Rajendra Deshmukh, Archana Kalekar
Battery-type materials with ultrahigh energy density show great potential for hybrid supercapacitors (HSCs). In this work, we have developed a nickel selenide (NiSe)/reduced graphene oxide (rGO)/graphitic carbon nitride (g-C3 N4 ) ternary composite as a promising positive electrode for hybrid supercapacitors (HSCs). The extended π-conjugated planar layers of g-C3 N4 promote strong interconnectivity with rGO, which further enhances surface area, surface free energy, and efficient electron/ionic path. Additionally, it establishes clear ion diffusion pathways, serving as ion reservoirs during charge and discharge and facilitating efficient redox reactions...
February 27, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38410880/graphene-exfoliation-using-multidomain-peptides
#24
JOURNAL ARTICLE
Ruitao Jin, Nermina Brljak, Joseph M Slocik, Rahul Rao, Marc R Knecht, Tiffany R Walsh
Liquid-phase exfoliation using biomolecules in aqueous solution is a promising approach to obtain high quality 2D nanosheets. For example, the well-studied graphene-binding peptide, P1 (sequence HSSYWYAFNNKT), has been previously investigated and shown to have a good ability to exfoliate graphene sheets in aqueous conditions under sonication, maintaining colloidal stability. Building on this, the biomolecular exfoliant and assembly motif (BEAM) peptide, that features a graphene-binding domain at one end and a hexagonal boron nitride (h-BN) binding domain at the other, separated by a 10-carbon fatty acid chain in the centre, is shown to exfoliate graphene sheets from bulk graphite in aqueous media...
February 27, 2024: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://read.qxmd.com/read/38409209/a-biocompatible-npk-fe-zn-slow-release-fertilizer-synthesis-and-its-evaluation-in-tomato-plant-growth-improvement
#25
JOURNAL ARTICLE
Tahereh Raiesi Ardali, Leila Ma'mani, Mostafa Chorom, Elaheh Motamedi, Mohammad Fathi Gharebaba
Slow-release fertilizers (SRFs) play an essential and necessary role in sustainable agriculture. Using slow-release and environment friendly fertilizers can increase the growth of plants and reduce the loss of nutrients. Considering the deficiency of iron (Fe) and zinc (Zn) in calcareous soils, a slow-release fertilizer was prepared based on the polymeric nanocomposite, which contains NPK, Fe, and Zn. Its potential was evaluated on tomato plant growth by conducting an experiment in a factorial completely randomized design with three replications...
February 26, 2024: Scientific Reports
https://read.qxmd.com/read/38408185/exceptional-viscoelastic-properties-in-graphene-oxide-films
#26
JOURNAL ARTICLE
Gehan C Jayatilaka, Athena Aber, Moein Mohammadi, Vahid Morovati, Mehran Tehrani
Materials that combine high stiffness with effective damping are in high demand across various industries. While polymers excel in damping, they often lack stiffness and thermal stability. Conversely, metals and ceramics boast high mechanical and thermal properties but lack damping. This study demonstrates that graphene oxide (GO) and reduced graphene oxide (rGO) films can achieve exceptional viscoelastic properties across a wide temperature range. Furthermore, it explains the damping mechanisms and structural characteristics that influence the unique viscoelastic behavior of GO and rGO films...
February 26, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38405382/applications-of-graphene-oxide-and-reduced-graphene-oxide-in-advanced-dental-materials-and-therapies
#27
REVIEW
Amal M Sindi
The graphene family of nanomaterials acquired significant attention in the field of dentistry due to a range of interesting properties. Graphene oxide (GO) and reduced graphene oxide (rGO) are the major graphene derivatives that are widely used in dental applications. These derivatives exhibit excellent mechanical properties, superior biocompatibility, good antibacterial properties, extreme chemical stability, and favorable tribological characteristics, thus representing highly materials for dentistry. The amphiphilic nature of GO allows covalent and noncovalent modifications that are favorable for biomedical applications...
April 2024: Journal of Taibah University Medical Sciences
https://read.qxmd.com/read/38401183/preparation-and-sustained-release-mechanism-of-hydroxybutyl-chitosan-graphene-oxide-temperature-sensitive-hypoglycaemic-subcutaneous-implants
#28
JOURNAL ARTICLE
Li Li, Fengting Xiang, Fan Wang, Anqi Chen, Yu Liu
The current situation of diabetes prevention and control is extremely severe. For instance, glimepiride (GLM), a third-generation sulfonylurea, demonstrates suboptimal clinical efficacy in oral dosage forms, which underscores the pressing need for the development of a new dosage form. Recently, in situ gel subcutaneous implants have garnered considerable attention. Hydroxybutyl chitosan (HBC) can spontaneously crosslink to form a thermosensitive hydrogel and has good biocompatibility. However, its application is hindered by its limited mechanical properties...
February 14, 2024: Colloids and Surfaces. B, Biointerfaces
https://read.qxmd.com/read/38397858/biological-effects-of-small-sized-graphene-oxide-nanosheets-on-human-leukocytes
#29
JOURNAL ARTICLE
Michele Aventaggiato, Federica Valentini, Daniela Caissutti, Michela Relucenti, Marco Tafani, Roberta Misasi, Alessandra Zicari, Sara Di Martino, Sara Virtuoso, Anna Neri, Stefania Mardente
Since the discovery of graphene, there has been a wide range of the literature dealing with its versatile structure and easy binding of biomolecules as well as its large loading capacity. In the emerging field of immunotherapy, graphene and its derivatives have potential uses as drug delivery platforms directly into tumour sites or as adjuvants in cancer vaccines, as they are internalized by monocytes which in turn may activate adaptive anti-tumoral immune responses. In this study, we expose cells of the innate immune system and a human acute monocytic leukemia cell line (THP-1) to low doses of small-sized GO nanosheets functionalized with bovine serum albumin (BSA) and fluorescein isothiocyanate (FITC), to study their acute response after internalization...
January 23, 2024: Biomedicines
https://read.qxmd.com/read/38397066/nanostructured-coatings-based-on-graphene-oxide-for-the-management-of-periprosthetic-infections
#30
JOURNAL ARTICLE
Sorin Constantinescu, Adelina-Gabriela Niculescu, Ariana Hudiță, Valentina Grumezescu, Dragoș Rădulescu, Alexandra Cătălina Bîrcă, Gabriela Dorcioman, Oana Gherasim, Alina Maria Holban, Bianca Gălățeanu, Bogdan Ștefan Vasile, Alexandru Mihai Grumezescu, Alexandra Bolocan, Radu Rădulescu
To modulate the bioactivity and boost the therapeutic outcome of implantable metallic devices, biodegradable coatings based on polylactide (PLA) and graphene oxide nanosheets (nGOs) loaded with Zinforo™ (Zin) have been proposed in this study as innovative alternatives for the local management of biofilm-associated periprosthetic infections. Using a modified Hummers protocol, high-purity and ultra-thin nGOs have been obtained, as evidenced by X-ray diffraction (XRD) and transmission electron microscopy (TEM) investigations...
February 17, 2024: International Journal of Molecular Sciences
https://read.qxmd.com/read/38395288/tailored-gelatin-methacryloyl-based-hydrogel-with-near-infrared-responsive-delivery-of-qiai-essential-oils-boosting-reactive-oxygen-species-scavenging-antimicrobial-and-anti-inflammatory-activities-for-diabetic-wound-healing
#31
JOURNAL ARTICLE
Na Meng, Chuchao Zhou, Zhiwei Sun, Xiangru Chen, Shaotang Xiong, Mengjuan Tao, Yueyue Qin, Keqiang Hu, Liya Ma, Di Tian, Fen Zhu, Yanqing Yang
The management of diabetic wounds poses a substantial economic and medical burden for diabetic patients. Oxidative stress and persistent bacterial infections are considered to be the primary factors. Qiai essential oil (QEO) exhibits various pharmacological characteristics, including inflammatory-reducing, antibacterial, and antioxidant properties. Nevertheless, the hydrophobic nature and propensity for explosive release of this substance present constraints on its potential for future applications. Here, we developed a stimulus-responsive hydrogel to overcome the multiple limitations of QEO-based wound dressings...
February 21, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38394819/electroactive-poly-vinylidene-fluoride-trifluoroethylene-graphene-composites-for-cardiac-tissue-engineering-applications
#32
JOURNAL ARTICLE
R M Meira, S Ribeiro, I Irastorza, U Silván, S Lanceros-Mendez, C Ribeiro
Electroactive materials are increasingly being used in strategies to regenerate cardiac tissue. These materials, particularly those with electrical conductivity, are used to actively recreate the electromechanical nature of the cardiac tissue. In the present work, we describe a novel combination of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), a highly electroactive polymer, with graphene (G), exhibiting high electrical conductivity. G/P(VDF-TrFE) films have been characterized in terms of topographical, physico-chemical, mechanical, electrical, and thermal properties, and studied the response of cardiomyocytes adhering to them...
February 19, 2024: Journal of Colloid and Interface Science
https://read.qxmd.com/read/38393750/wearable-sensor-based-on-a-tough-conductive-gel-for-real-time-and-remote-human-motion-monitoring
#33
JOURNAL ARTICLE
Yan Yang, Chen Yao, Wen-Yao Huang, Cai-Ling Liu, Ye Zhang
The usage of a conductive hydrogel in wearable sensors has been thoroughly researched recently. Nonetheless, hydrogel-based sensors cannot simultaneously have excellent mechanical property, high sensitivity, comfortable wearability, and rapid self-healing performance, which result in poor durability and reusability. Herein, a robust conductive hydrogel derived from one-pot polymerization and subsequent solvent replacement is developed as a wearable sensor. Owing to the reversible hydrogen bonds cross-linked between polymer chains and clay nanosheets, the resulting conductive hydrogel-based sensor exhibits outstanding flexibility, self-repairing, and fatigue resistance performances...
February 23, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38389687/capacitance-of-flexible-polymer-graphene-microstructures-with-high-mechanical-strength
#34
JOURNAL ARTICLE
Vahid Nasirian, Amir Ehsan Niaraki-Asli, Saurabh S Aykar, Mehrnoosh Taghavimehr, Reza Montazami, Nicole N Hashemi
Carbon-modified fibrous structures with high biocompatibility have attracted much attention due to their low cost, sustainability, abundance, and excellent electrical properties. However, some carbon-based materials possess low specific capacitance and electrochemical performance, which pose significant challenges in developing electronic microdevices. In this study, we report a microfluidic-based technique of manufacturing alginate hollow microfibers incorporated by water dispersed modified graphene (bovine serum albumin-graphene)...
February 1, 2024: 3D Printing and Additive Manufacturing
https://read.qxmd.com/read/38388664/polycaprolactone-polyacrylic-acid-graphene-oxide-composite-nanofibers-as-a-highly-efficient-sorbent-to-remove-lead-toxic-metal-from-drinking-water-and-apple-juice
#35
JOURNAL ARTICLE
Mohammadreza Rostami, Gholamreza Jahed-Khaniki, Ebrahim Molaee- Aghaee, Nabi Shariatifar, Mahmood Alizadeh Sani, Mahmood Azami, Sima Rezvantalab, Soghra Ramezani, Marjan Ghorbani
Due to the characteristics of electrospun nanofibers (NFs), they are considered a suitable substrate for the adsorption and removal of heavy metals. Electrospun nanofibers are prepared based on optimized polycaprolactone (PCL, 12 wt%) and polyacrylic acid (PAA, 1 wt%) polymers loaded with graphene oxide nanoparticles (GO NPs, 1 wt%). The morphological, molecular interactions, crystallinity, thermal, hydrophobicity, and biocompatibility properties of NFs are characterized by spectroscopy (scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Thermogravimetric analysis), contact angle, and MTT tests...
February 22, 2024: Scientific Reports
https://read.qxmd.com/read/38387099/nanotoxicity-of-two-dimensional-nanomaterials-on-human-skin-and-the-structural-evolution-of-keratin-protein
#36
JOURNAL ARTICLE
Changji Yin, Lei Yu, Lei Feng, Joey Tianyi Zhou, Chunbao Du, Xiaoshan Shao, Yuan Cheng
Two-dimensional (2D) materials have been increasingly widely used in biomedical and cosmetical products nowadays, yet their safe usage in human body and environment necessitates a comprehensive understanding of their nanotoxicity. In this work, the effect of pristine graphene (PG) and graphene oxide (GO) on the adsorption and conformational changes of skin keratin using molecular dynamics (MD) simulations. It is found that skin keratin can be absorbed through various noncovalent driving forces, such as van der Waals (vdW) and electrostatics...
February 22, 2024: Nanotechnology
https://read.qxmd.com/read/38385240/-research-progress-of-antibacterial-hydrogel-in-treatment-of-infected-wounds
#37
JOURNAL ARTICLE
Xiaoran Zu, Yudi Han, Wei Zhou, Chaoji Huangfu, Ming Zhang, Yan Han
OBJECTIVE: To review the research progress of new antibacterial hydrogels in the treatment of infected wounds in the field of biomedicine, in order to provide new methods and ideas for clinical treatment of infected wounds. METHODS: The research literature on antibacterial hydrogels at home and abroad was extensively reviewed in recent years, and the antibacterial hydrogels for the treatment of infected wounds were classified and summarized. RESULTS: Antibacterial hydrogels can be divided into three categories: inherent antibacterial hydrogels, antibacterial agent release hydrogels, and environmental response antibacterial hydrogels...
February 15, 2024: Chinese Journal of Reparative and Reconstructive Surgery
https://read.qxmd.com/read/38385172/reversible-thermoelectric-regulation-of-electromagnetic-and-chemical-enhancement-for-rapid-sers-detection
#38
JOURNAL ARTICLE
Chao Zhang, Jibing Tan, Baoqiang Du, Chang Ji, Zhiyang Pei, Mingrui Shao, Shouzhen Jiang, Xiaofei Zhao, Jing Yu, Baoyuan Man, Zhen Li, Kaichen Xu
Actively controlling surface-enhanced Raman scattering (SERS) performance plays a vital role in highly sensitive detection or in situ monitoring. Nevertheless, it is still challenging to achieve further modulation of electromagnetic enhancement and chemical enhancement simultaneously in SERS detection. In this study, a silver nanocavity structure with graphene as a spacer layer is coupled with thermoelectric semiconductor P-type gallium nitride (GaN) to form an electric-field-induced SERS (E-SERS) for dual enhancement...
February 22, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38381066/angle-resolved-optical-imaging-of-interlayer-rotations-in-twisted-bilayer-graphene
#39
JOURNAL ARTICLE
Zuoquan Tan, Shuo Han, Jiaqi Jia, Meijie Zhu, Hua Xu, Shuo Mi, Kai Li, Le Wang, Zhihai Cheng, Shanshan Chen
Twisted bilayer graphene (TBG) is a prototypical layered material whose properties are strongly correlated to interlayer coupling. The two stacked graphene layers with distinct orientations are investigated to generate peculiar optical and electronic phenomena. Thus, the rapid, reliable, and nondestructive twist angle identification technique is of essential importance. Here, we integrated the white light reflection spectra (WLRS), the Raman spectroscopy, and the transmission electron microscope (TEM) to propose a facile RGB optical imaging technique that identified the twist angle of the TBG in a large area intuitively with high efficiency...
February 21, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38378454/multifunctional-siloxene-decorated-laser-inscribed-graphene-patch-for-sweat-ion-analysis-and-electrocardiogram-monitoring
#40
JOURNAL ARTICLE
Xue Hui, Md Asaduzzaman, M Abu Zahed, Sudeep Sharma, SeongHoon Jeong, Hyesu Song, Omar Faruk, Jae Yeong Park
Potentiometric detection in complex biological fluids enables continuous electrolyte monitoring for personal healthcare; however, the commercialization of ion-selective electrode-based devices has been limited by the rapid loss of potential stability caused by electrode surface inactivation and biofouling. Here, we describe a simple multifunctional hybrid patch incorporating an Au nanoparticle/siloxene-based solid contact (SC) supported by a substrate made of laser-inscribed graphene on poly(dimethylsiloxane) for the noninvasive detection of sweat Na+ and K+ ...
February 20, 2024: ACS Applied Materials & Interfaces
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