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Mechanisms for strong adsorption of tetracycline to carbon nanotubes: a comparative study using activated carbon and graphite as adsorbents.

Significant concerns have been raised over the presence of antibiotics including tetracyclines in aquatic environments. We herein studied single-walled carbon nanotubes (SWNT) and multi-walled carbon nanotubes (MWNT) as potential effective adsorbents for removal of tetracycline from aqueous solution. In comparison, a nonpolar adsorbate, naphthalene, and two other carbonaceous adsorbents, pulverized activated carbon (AC) and nonporous graphite, were used. The observed adsorbent-to-solution distribution coefficient (Kd, L/kg) of tetracycline was in the order of 10(4)-10(6) L/kg for SWNT, 10(3)-1…

Simultaneous determination of adenine guanine and thymine at multi-walled carbon nanotubes incorporated with poly(new fuchsin) composite film.

A composite film (MWCNTs-PNF) which contains multi-walled carbon nanotubes (MWCNTs) along with the incorporation of poly(new fuchsin) (PNF) has been synthesized on glassy carbon electrode (GCE), gold (Au) and indium tin oxide (ITO) by potentiostatic methods. The presence of MWCNTs in the composite film enhances surface coverage concentration (Gamma) of PNF to approximately 176.5%, and increases the electron transfer rate constant (k(s)) to approximately 346%. The composite film also exhibits promising enhanced electrocatalytic activity towards the mixture of biochemical compounds such as adeni…

Comparative study of pathological lesions induced by multiwalled carbon nanotubes in lungs of mice by intratracheal instillation and inhalation.

The pathological lesions induced by multiwalled carbon nanotubes (MWCNTs) in bronchi and alveoli of mice were studied by intratracheal instillation and inhalation. In instillation groups, the dose was 0.05 mg MWCNTs/mouse. Similar size clumps of MWCNTs were distributed in bronchi and alveoli. The clumps led to inflammation to the lining wall of bronchi and severe destruction to alveolar netted structure around them. In the inhalation groups, the mice were exposed to aerosolized MWCNTs with mean concentration of 32.61 mg/m(3), the intralung deposition dose were roughly 0.07, 0.14, and 0.21 mg i…

Toxicity of single walled carbon nanotubes to rainbow trout, (Oncorhynchus mykiss): respiratory toxicity, organ pathologies, and other physiological effects.

Mammalian studies have raised concerns about the toxicity of carbon nanotubes (CNTs), but there is very limited data on ecotoxicity to aquatic life. We describe the first detailed report on the toxicity of single walled carbon nanotubes (SWCNT) to rainbow trout, using a body systems approach. Stock solutions of dispersed SWCNT were prepared using a combination of solvent (sodium dodecyl sulphate, SDS) and sonication. A semi-static test system was used to expose rainbow trout to either a freshwater control, solvent control, 0.1, 0.25 or 0.5 mgl(-1) SWCNT for up to 10 days. SWCNT exposure caused…

Hydrothermal Synthesis of Carbon Dot-Modified Multiwalled Carbon Nanotube Composites for Advanced Treatment of Oxytetracycline in Water.

To prevent the proliferation of the OTC resistance genes in wastewater and their spread in the environment, advanced treatment of the OTC-containing wastewater has become necessary. In this study, an adsorbent material consisting of CDs/o-MWCNTs was synthesized using a combination of DBD technology and a hydrothermal method. The material was characterized by TEM, SEM, FT-IR, XRD, XPS, BET, TGA, and surface ζ-potential analysis. The effects of the adsorbent dosage, adsorption temperature, solution pH, adsorption time, and ionic interference on the adsorption of the OTC by CDs/o-MWCNTs were inve

MXene/Carbon Nanotube/Poly(ethylene oxide) Heterostructured Interface for Polysulfide Regulation in Lithium-Sulfur Batteries.

Lithium-sulfur (Li-S) batteries are promising next-generation energy-storage systems but are severely hindered by polysulfide shuttling, sluggish sulfur redox kinetics, and unstable Li2S nucleation/growth behavior. Herein, a multifunctional MXene/carbon nanotube/poly(ethylene oxide) (MX/CNT/PEO)-modified separator is developed to regulate polysulfide behavior and improve interfacial electrochemical stability. In this composite architecture, MXene provides polar sites for lithium polysulfide adsorption, while carbon nanotubes construct interconnected conductive networks and suppress MXene resta…

Multiscale Characterization and Two-Stage Assembly Mechanism of Dimension-Limited Self-Aligned Carbon Nanotube Arrays.

High-density, semiconducting aligned carbon nanotube arrays (A-CNTs) are essential for next-generation electronics. Dimension-limited self-alignment (DLSA) is a leading route to wafer-scale A-CNT fabrication, yet the instabilities that limit array quality remain poorly understood, hampering targeted process optimization. Here, we establish a multiscale characterization framework combining cross-polarized optical microscopy (xPOM) and scanning electron microscopy (SEM) to evaluate DLSA-prepared A-CNT wafers and identify the underlying film-formation mechanism. Notably, characterization of the e

Architecting Dandelion-Like Silica Nanotube Superparticles Via Hierarchical Emulsion-Mediated Sol-Gel Synthesis.

The assembly of nanotubes into 3D superstructures that combine high active-site density with efficient mass transport remains a significant challenge. Conventional silica nanotubes tend to tangle and form disordered aggregates, burying functional interfaces and limiting practical applications. Herein, we introduce a hierarchical emulsion-mediated sol-gel strategy for the direct construction of dandelion-like silica nanotube superparticles (D-SiO2 NTS) composed of radially aligned nanotube bundles. In a biphasic pentanol-water system, organosilane-rich droplets and surface-localized water-enric…

Подстегнутая стрессом связь с нанотрубкой в глиальных клетках CNS: последствия провокационного демиэлирования и отказа в ремонте.

Множественные склерозы и связанные с ними воспалительные расстройства центральной нервной системы, включая расстройство спектра нейромиелита, расстройство спектра и болезнь миэлина олигодендроцита гликопротеина, связанные с антителами, характеризуются повреждениями имунной ткани, глиальной дисфункцией, метаболическим стрессом и неполным ремонтом. Хотя периферическая иммунная инфильтрация и антителные механизмы объясняют многие аспекты образования острых повреждений, они не в полной мере учитывают стойкую активность повреждения, метаболическую нестабильность или отказ от ремиэлирования в местно

Совпадение в аннотации оригинала
Multiple sclerosis and related inflammatory demyelinating disorders of the central nervous system, including neuromyelitis optica spectrum d … metabolic instability, or remyelination failure within the local tissue microenvironment. Tunneling nanotubes are thin, actin-rich membranous connections that enable direct intercellular transfer of organelles, vesicles, proteins, ions, and stress-related cargoes. In the nervous system, tunneling nanotube-mediated communication has been implicated in mitoch …

K-FeCu/Multiwalled Carbon Nanotube with Hydrophobic Confinement and Multisites Synergy for Boosting CO2 Hydrogenation to Ethanol.

CO2 hydrogenation to ethanol is a promising pathway for carbon utilization, yet it remains challenged by the deactivation of iron-based catalysts due to water byproducts and the difficulty in controlling product selectivity. To address these issues, this work constructed hydrophobic MWCNT-supported K-FeCu bimetallic catalysts and systematically investigated their structure-activity relationships. The optimized catalyst (Fe/Cu = 0.5) exhibited superior performance at 320 °C and 4 MPa, achieving a CO2 conversion of 41.1%, with ethanol selectivity and space-time yield (STY) reaching 28.91% and 17

Helical carbon nanotube membranes for efficient purification of ultrafine oily aerosols in moxa smoke and respiratory protection.

Moxibustion, a traditional Chinese medicine therapy, utilizes the therapeutic components in smoke generated by burning moxa sticks for treatment. However, the concomitant ultrafine oily aerosols could cause respiratory irritation, limiting its broader adoption. Herein, a helical carbon nanotube membrane (HCNTM) was developed via a morphology-control strategy for moxa smoke purification and occupational health protection. The HCNTM demonstrated stable filtration efficiency of >99.9% for oily aerosols with sizes of 100, 200, 300 and 1000 nm. Furthermore, the used HCNTM could be regenerated withi

Quantum size effect and two-step condensation of ideal Bose atoms in an optical hard-wall nanotube.

We consider a quasi-one-dimensional (quasi-1D) system that is an optical hard-wall nanotube with axial harmonic potential. This quasi-1D system possesses a quasi-1D harmonic potential that consists of a 1D harmonic trap along the z axis and a two-dimensional box trap in the x-y plane. Within the framework of quantum statistical mechanics, we find that in a quasi-1D harmonic potential, the generalized Bose-Einstein condensation (GBEC) can be classified into the two types. The first type of GBEC (GBEC_{1}) corresponds to T_{m}<T_{c}. The second type of GBEC (GBEC_{2}) corresponds to T_{c}<T_{m}.

Electrochemical biosensing of alpha-fetoprotein based on carboxylated multi-walled nanotube-polyAzur A (in DES)-gold nanoparticles.

AFP, a cancer biomarker, is monitored during fetal development and in the serum of pregnant women. Sensitive and rapid monitoring of AFP is crucial for effective management. In this study, screen-printed carbon electrodes (SPCEs) modified with multi-walled carbon nanotubes (MWCNT-COOH), polyAzur A (PAA), which was prepared in a deep eutectic solution (DES), and gold nanoparticles (AuNP) were fabricated. AFP biosensors were developed for practical, sensitive, low-cost, and rapid detection of AFP. Optimizations of nanostructures (MWCNT-COOH, AuNP) and polymers (PAADES) were performed. The MWCNT-…

Hierarchical Titania Nanotube-Graphene Oxide-Arginine Interfaces for Tunable Drug Release and Enhanced Antibiofilm Performance.

Implant-associated infections (IAIs) driven by multidrug-resistant pathogens, such as Methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus epidermidis (S. epidermidis), are two of the most challenging organisms responsible for recurrent implant failures. To mitigate this problem, we have developed broad-spectrum, efficient antibiofilm coatings for the titanium implant surface, which is modified with titania nanotube arrays (TNTA) via electrochemical methods. The resulting TNTA loaded with vancomycin (V-TNTA) and coated with polycaprolactone (PCL) fibers incorporating functiona

Shortly Cut Carbon Nanotube as a Conductive Additive for High-Performance Silicon Anodes in Lithium-Ion Batteries.

Silicon (Si) anodes have garnered significant interest for next-generation energy storage systems due to their high theoretical capacity. However, Si anodes suffer from large volume expansion and poor electrical conductivity. Adding carbon nanotubes (CNTs) as a conductive additive is considered an effective method for addressing the aforementioned issues of Si. CNTs have a unique one-dimensional morphology and excellent conductivity, but strong van der Waals interactions and their long length cause severe aggregation and create entangled bulky structures that impede effective charge transfer w…

Interface Cleaning Strategy of Carbon Nanotube Field-Effect Transistor Biosensors for Ultrasensitive Detection of Ophthalmic Biomarkers.

Carbon nanotube (CNT) field-effect transistor (FET) biosensors combine the molecular recognition capabilities of bioreceptors with the signal amplification and transduction functions of nano-FET devices, enabling highly specific and ultrasensitive biomolecule detection. However, interface degradation and contamination introduced in the micronanofabrication process of batch manufacturing led to inhomogeneity in biofunctionalization of device and sensing performance, thus limiting the reproducible preparation and large-scale application of CNT FET biosensors. In this study, we proposed a compreh

Gelatin Multiwalled Carbon Nanotube Composite 3D Printed Semi Biological Mesh for Abdominal Hernia Treatment.

Hernia is characterized by the protrusion of organs or tissue through weakened areas in the abdominal cavity wall. A common treatment for hernia involves the implantation of a mesh which promotes the growth of new tissue around or within the implanted material in the damaged area. The mesh is typically made from synthetic materials like polypropylene. However, such meshes have safety concerns like biofilm and scar tissue formation, foreign body reactions, and chronic pain. These concerns gave rise to the development of biological meshes. Owing to mechanical weakness, biological meshes fail due

Tunneling nanotube-mediated stem cell immunomodulation dysfunction promotes adipose inflammation and insulin resistance in GDM.

Adipose-derived stem cells (ADSCs) represent a promising therapeutic resource, yet their immunometabolic regulation remains poorly defined. Here, we reveal a tunneling nanotube (TNT)-mediated communication mechanism between ADSCs and adipose tissue macrophages (ATMs) that maintains metabolic homeostasis during pregnancy. Using gestational diabetes mellitus (GDM) mouse models combined with live-cell imaging, scanning electron microscope, and multi-omics approaches, we demonstrate that mitochondrial transfer from ADSCs to ATMs via TNTs sustains ATM metabolic fitness. This process is governed by

Crack-Enhanced MXene-Carbon Nanotube Soft Contact Lens for Body-Induced Intracranial Pressure Application.

Continuous monitoring of intracranial pressure (ICP) can guarantee stable vital signs and help avoid the risk of debilitating headaches, transient ocular blindness, and optic atrophy caused by elevated ICP, which are critical for patients or specific groups like astronauts and athletes. However, in situ ICP detection typically relies on neural pixels that require a surgical procedure, such as a craniotomy. Here, we report a continuous and nondestructive ICP detection approach via an in situ intraocular pressure (IOP) monitoring system, which includes a pressure response unit using a microcrack

Investigation of small inhibitor effects on methane hydrate formation in a carbon nanotube using molecular dynamics simulation.

In this work, we simulated water molecules in fixed and rigid (15,0) CNTs and the confined water molecules formed a hexagonal ice nanotube in the CNT. After the addition of methane molecules in the nanotube, the hexagonal structure of confined water molecules disappeared and were replaced by almost all the guest methane molecules. The replaced molecules formed a row of water molecules in the middle of the hollow space of the CNT. We also added five small inhibitors with different concentrations (0.8 mol% and 3.8 mol%) to methane clathrates in CNT: benzene, 1-ethyl-3-methylimidazolium chloride