scholarly journals The Advances in Biomedical Applications of Carbon Nanotubes

2019 ◽  
Vol 5 (2) ◽  
pp. 29 ◽  
Author(s):  
Timur Saliev
Keyword(s):  
Carbon Nanotubes ◽  
Biomedical Applications ◽  
High Surface ◽  
High Surface Area ◽  
Ideal Candidate ◽  
Biological Features ◽  
On Demand ◽  
Synthesis Of Carbon Nanotubes ◽  
Nano Size ◽  
Unique Chemical

Unique chemical, physical, and biological features of carbon nanotubes make them an ideal candidate for myriad applications in industry and biomedicine. Carbon nanotubes have excellent electrical and thermal conductivity, high biocompatibility, flexibility, resistance to corrosion, nano-size, and a high surface area, which can be tailored and functionalized on demand. This review discusses the progress and main fields of bio-medical applications of carbon nanotubes based on recently-published reports. It encompasses the synthesis of carbon nanotubes and their application for bio-sensing, cancer treatment, hyperthermia induction, antibacterial therapy, and tissue engineering. Other areas of carbon nanotube applications were out of the scope of this review. Special attention has been paid to the problem of the toxicity of carbon nanotubes.

scholarly journals 3D Bioprinted Nanocellulose-Based Hydrogels for Tissue Engineering Applications: A Brief Review

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 898 ◽  
Author(s):  
Sandya S. Athukoralalage ◽  
Rajkamal Balu ◽  
Naba K. Dutta ◽  
Namita Roy Choudhury
Keyword(s):  
Tissue Engineering ◽  
Biomedical Applications ◽  
High Surface ◽  
Cellulose Nanofibers ◽  
High Surface Area ◽  
3D Bioprinting ◽  
Engineering Applications ◽  
Bacterial Nanocellulose ◽  
On Demand ◽  
Cell Support

Nanocellulosic materials, such as cellulose nanocrystals, cellulose nanofibers, and bacterial nanocellulose, that display high surface area, mechanical strength, biodegradability, and tunable surface chemistry have attracted great attention over the last decade for biomedical applications. Simultaneously, 3D printing is revolutionizing the field of biomedical engineering, which enables the fast and on-demand printing of customizable scaffolds, tissues, and organs. Nanocellulosic materials hold tremendous potential for 3D bioprinting due to their printability, their shear thinning behavior, their ability to live cell support and owing to their excellent biocompatibility. The amalgamation of nanocellulose-based feedstocks and 3D bioprinting is therefore of critical interest for the development of advanced functional 3D hydrogels. In this context, this review briefly discusses the most recent key developments and challenges in 3D bioprinting nanocellulose-based hydrogel constructs that have been successfully tested for mammalian cell viability and used in tissue engineering applications.

EVALUATION OF THE EFFECT OF CATALYST TEXTURAL PROPERTIES ON EFFECTIVE SYNTHESIS OF CARBON NANOTUBES

2013 ◽  
Vol 12 (04) ◽  
pp. 1350030
Author(s):  
WEI-MING YEOH ◽  
KIM-YANG LEE ◽  
KEAT-TEONG LEE ◽  
ABDUL RAHMAN MOHAMED ◽  
SIANG-PIAO CHAI
Keyword(s):  
Carbon Nanotubes ◽  
Citric Acid ◽  
Pore Size ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Textural Properties ◽  
High Yield ◽  
Polyethylene Glycol 200 ◽  
Synthesis Of Carbon Nanotubes

Co – Mo / MgO catalysts of same content but different textural properties were prepared through manipulation of foaming agents (ethylene glycol, citric acid and polyethylene glycol 200) in a sol–gel method. Experimental results indicated that surface area and pore size of the catalysts were equally important in the synthesis of carbon nanotubes (CNTs) from catalytic chemical vapor deposition. It was found that the catalysts with high surface area and large pore size were the main criteria for high yield synthesis of CNTs of better graphitized wall structure. High surface area helped in the dispersion of active metals, thus increasing the number of active sites for nucleation and growth of CNTs. Meanwhile, larger pore size facilitated better mass transfer between the inner pore and the exterior reaction atmosphere, and it provided a larger space for unrestricted growth of CNTs. In the present work, we demonstrated that the Co – Mo / MgO catalysts prepared by citric acid possessed both larger average pore size and higher surface area, which provoked the synthesis of better quality (graphitized) CNTs in high yield.

Facile Synthesis of Cu2O nanoparticle-loaded Carbon Nanotubes Composite Catalysts for Reduction of 4-Nitrophenol

2020 ◽  
Vol 16 (4) ◽  
pp. 617-624 ◽  
Author(s):  
Yao Feng ◽  
Ran Wang ◽  
Juanjuan Yin ◽  
Fangke Zhan ◽  
Kaiyue Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Stability ◽  
Catalytic Reduction ◽  
High Surface ◽  
High Surface Area ◽  
Reduction Reaction ◽  
Cycle Performance ◽  
Simple Method ◽  
Composite Catalysts ◽  
Cu2o Nanoparticles

Background: 4-nitrophenol (4-NP) is one of the pollutants in sewage and harmful to human health and the environment. Cu is a non-noble metal with catalytic reduction effect on nitro compounds, and.has the advantages of simple preparation, abundant reserves, and low price. Carbon nanotubes (CNT) are widely used for substrate due to their excellent mechanical stability and high surface area. In this study, a simple method to prepare CNT-Cu2O by controlling different reaction time was reported. The prepared nanocomposites were used to catalyze 4-NP. Methods: CNTs and CuCl2 solution were put into a beaker, and then ascorbic acid and NaOH were added while continuously stirring. The reaction was carried out for a sufficiently long period of time at 60°C. The prepared samples were dried in a vacuum at 50°C for 48 h after washing with ethyl alcohol and deionized water. Results: Nanostructures of these composites were characterized by scanning electron microscope and transmission electron microscopy techniques, and the results at a magnification of 200 nanometers showed that Cu2O was distributed on the surface of the CNTs. In addition, X-ray diffraction was performed to further confirm the formation of Cu2O nanoparticles. The results of ultraviolet spectrophotometry showed that the catalytic effect of the compound on 4-NP was obvious. Conclusions: CNTs acted as a huge template for loading Cu2O nanoparticles, which could improve the stability and cycle performance of Cu2O. The formation of nanoparticles was greatly affected by temperature and the appropriate concentration, showing great reducibility for the 4-NP reduction reaction.

Recent trends in carbon nanotubes based prostate cancer therapy: A biomedical hybrid for diagnosis and treatment

2021 ◽  
Vol 18 ◽  
Author(s):  
Raja Murugesan ◽  
Sureshkumar Raman
Keyword(s):  
Prostate Cancer ◽  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Drug Loading ◽  
High Surface ◽  
High Surface Area ◽  
High Capacity ◽  
Chemical Properties ◽  
Diagnosis And Treatment ◽  
High Level

: At present treatment methods for cancer are limited, partially due to the solubility, poor cellular distribution of drug molecules and, the incapability of drugs to annoy the cellular barriers. Carbon nanotubes (CNTs) generally have excellent physio-chemical properties, which include high-level penetration into the cell membrane, high surface area and high capacity of drug loading by in circulating modification with bio-molecules, project them as an appropriate candidate to diagnose and deliver drugs to prostate cancer (PCa). Additionally, the chemically modified CNTs which have excellent 'Biosensing' properties therefore makes it easy for detecting PCa without fluorescent agent and thus targets the particular site of PCa and also, Drug delivery can accomplish a high efficacy, enhanced permeability with less toxic effects. While CNTs have been mainly engaged in cancer treatment, a few studies are focussed on the diagnosis and treatment of PCa. Here, we detailly reviewed the current progress of the CNTs based diagnosis and targeted drug delivery system for managing and curing PCa.

Nano Hydroxyapatite (Nano-Hap): A Potential Bioceramic For Biomedical Applications

2021 ◽  
Vol 06 ◽  
Author(s):  
Varun Saxena ◽  
Lalit Pandey ◽  
T. S. Srivatsan
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Biomedical Applications ◽  
High Surface ◽  
High Surface Area ◽  
Biological Properties ◽  
Engineering Applications ◽  
Biological Responses ◽  
Size And Morphology

Background: Hydroxyapatite (HAp) is one of the most studied biomimic for biomedical applications. Specially, nano-HAp has been utilized for bone tissue engineering various orthopedic applications. HAp possesses various suitable properties such as bioactivity, biodegradability and cell proliferation efficiency for bone tissue engineering applications. Yet, lacks in self-antibacterial activity, high surface area and target efficiency. Results: In this directioon, researchers have focused on exploring the required surface as well as the inherent properties of HAp at the nanoscale. These properties are largely dependent on the composition, size and morphology of the nano-HAp. Hence, nano-HAp has been found to be an excellent candidate with an attractive combination of properties for selection and use in biomedical applications, those required to enhanced biological responses. Further, depending on the type of application, these factors can be tuned to optimize the performance. Conclusion: In this review article, we focus on the chemical structure of HAp and the routes chosen and used for the synthesis of the nano-HAp. The role of various parameters in controlling synthesis at the nanoscale are presented and briefly discussed. In addition, we provide an overview of the various applications for the pristine and doped nano-HAp with recent examples in areas spanning the following: (i) bone tissue engineering applications, (ii) drug delivery applications, (iii) surface coatings, and (iv) scaffolds. The effect of chemical composition on the mechanical properties, surface properties and biological properties are also highlighted. Nano-HAp is found to be highly proficient for its biomedical applications, especially for bone tissue engineering applications. The nano-sized properties enhances the biological responses. The dopant ions that replaces the Ca ion into the hydroxyapatite (HAp) lattice plays a crucial role in its biomedical applications

Recent Advances in the Development of Magnetic Nanoparticles for Biomedical Applications

2021 ◽  
Vol 21 (5) ◽  
pp. 2705-2741
Author(s):  
Maria Monteserín ◽  
Silvia Larumbe ◽  
Alejandro V. Martínez ◽  
Saioa Burgui ◽  
L. Francisco Martín
Keyword(s):  
Magnetic Nanoparticles ◽  
Physicochemical Properties ◽  
Biomedical Applications ◽  
High Surface ◽  
High Surface Area ◽  
Synthetic Methods ◽  
Magnetic Drug Targeting ◽  
Surface Area Ratio ◽  
Biomedical Field

The unique properties of magnetic nanoparticles have led them to be considered materials with significant potential in the biomedical field. Nanometric size, high surface-area ratio, ability to function at molecular level, exceptional magnetic and physicochemical properties, and more importantly, the relatively easy tailoring of all these properties to the specific requirements of the different biomedical applications, are some of the key factors of their success. In this paper, we will provide an overview of the state of the art of different aspects of magnetic nanoparticles, specially focusing on their use in biomedicine. We will explore their magnetic properties, synthetic methods and surface modifications, as well as their most significative physicochemical properties and their impact on the in vivo behaviour of these particles. Furthermore, we will provide a background on different applications of magnetic nanoparticles in biomedicine, such as magnetic drug targeting, magnetic hyperthermia, imaging contrast agents or theranostics. Besides, current limitations and challenges of these materials, as well as their future prospects in the biomedical field will be discussed.

scholarly journals Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1328 ◽  
Author(s):  
Marlon Danny Jerez-Masaquiza ◽  
Lenys Fernández ◽  
Gema González ◽  
Marjorie Montero-Jiménez ◽  
Patricio J. Espinoza-Montero
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Properties ◽  
Electrochemical Sensor ◽  
Prussian Blue ◽  
Surface Area ◽  
Glassy Carbon ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemically Deposited ◽  
Area X

In this work, a new hydrogen peroxide (H2O2) electrochemical sensor was fabricated. Prussian blue (PB) was electrodeposited on a glassy carbon (GC) electrode modified with zirconia doped functionalized carbon nanotubes (ZrO2-fCNTs), (PB/ZrO2-fCNTs/GC). The morphology and structure of the nanostructured system were characterized by scanning and transmission electron microscopy (TEM), atomic force microscopy (AFM), specific surface area, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman and Fourier transform infrared (FTIR) spectroscopy. The electrochemical properties were studied by cyclic voltammetry (CV) and chronoamperometry (CA). Zirconia nanocrystallites (6.6 ± 1.8 nm) with cubic crystal structure were directly synthesized on the fCNTs walls, obtaining a well dispersed distribution with a high surface area. The experimental results indicate that the ZrO2-fCNTs nanostructured system exhibits good electrochemical properties and could be tunable by enhancing the modification conditions and method of synthesis. The fabricated sensor could be used to efficiently detect H2O2, presenting a good linear relationship between the H2O2 concentration and the peak current, with quantification limit (LQ) of the 10.91 μmol·L−1 and detection limit (LD) of 3.5913 μmol·L−1.

scholarly journals Preparation and Characteristics of SiOx Coated Carbon Nanotubes with High Surface Area

Nanomaterials ◽  
2012 ◽  
Vol 2 (2) ◽  
pp. 206-216 ◽  
Author(s):  
Aeran Kim ◽  
Seongyop Lim ◽  
Dong-Hyun Peck ◽  
Sang-Kyung Kim ◽  
Byungrok Lee ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Coated Carbon

One-Step Synthesis of Nano-Size Iron Oxide /Three-Dimensional Wormlike Hierarchical Mesoporous SiO2 Catalysts and its Catalytic Performance on Phenol Hydroxylation

2013 ◽  
Vol 662 ◽  
pp. 202-206
Author(s):  
Jia Feng Wu ◽  
Yu Mei Zhao ◽  
Peng Liang
Keyword(s):  
Iron Oxide ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Phenol Hydroxylation ◽  
Weight Percentage ◽  
One Step ◽  
Hierarchical Pore ◽  
Nano Size

A series of nano-sized iron oxide supported on 3D wormlike hierarchical mesoporous SiO2 catalysts were synthesized by one-step hydrothermal synthesis. The samples were characterized by XRD, N2 sorption, FT-IR, UV–Vis, TEM and ICP-AES. The catalysts were probed for the oxidation of phenol employing hydrogen peroxide. The results indicate that the materials exhibit high surface area and 3D wormlike hierarchical pore, iron ions exist as isolated framework species when the weight percentage content of iron is below 0.24 and nano-size iron oxide is dispersed in the surface (iron content above 0.24 wt%). Catalytic performance indicates that nano-size iron oxide supported on SiO2 is useful to enhance both the catalytic activity and the selectivity of target products compared with isolated iron species.

An approach to carbon nanotubes with high surface area and large pore volume

2007 ◽  
Vol 100 (1-3) ◽  
pp. 1-5 ◽  
Author(s):  
Jun Jie Niu ◽  
Jian Nong Wang ◽  
Ying Jiang ◽  
Lian Feng Su ◽  
Jie Ma
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Large Pore ◽  
Large Pore Volume
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