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carbon nanomaterial

Rahul Rao, Cary L Pint, Ahmad E Islam, Robert S Weatherup, Stephan Hofmann, Eric R Meshot, Fanqi Wu, Chongwu Zhou, Nicholas Dee, Placidus B Amama, Jennifer Carpena-Nuñez, Wenbo Shi, Desiree L Plata, Evgeni S Penev, Boris I Yakobson, Perla B Balbuena, Christophe Bichara, Don N Futaba, Suguru Noda, Homin Shin, Keun Su Kim, Benoit Simard, Francesca Mirri, Matteo Pasquali, Francesco Fornasiero, Esko I Kauppinen, Michael Arnold, Baratunde A Cola, Pavel Nikolaev, Sivaram Arepalli, Hui-Ming Cheng, Dmitri N Zakharov, Eric A Stach, Jin Zhang, Fei Wei, Mauricio Terrones, David B Geohegan, Benji Maruyama, Shigeo Maruyama, Yan Li, W Wade Adams, A John Hart
Advances in the synthesis and scalable manufacturing of single-walled carbon nanotubes (SWCNTs) remain critical to realizing many important commercial applications. Here we review recent breakthroughs in the synthesis of SWCNTs and highlight key ongoing research areas and challenges. A few key applications that capitalize on the properties of SWCNTs are also reviewed with respect to the recent synthesis breakthroughs and ways in which synthesis science can enable advances in these applications. While the primary focus of this review is on the science framework of SWCNT growth, we draw connections to mechanisms underlying the synthesis of other 1D and 2D materials such as boron nitride nanotubes and graphene...
December 5, 2018: ACS Nano
Sreeja Sarasamma, Gilbert Audira, Stevhen Juniardi, Bonifasius Putera Sampurna, Yu-Heng Lai, Erwei Hao, Jung-Ren Chen, Chung-Der Hsiao
There is a growing concern for the potential toxicity of engineered nanomaterials that have made their way into virtually all novel applications in the electronics, healthcare, cosmetics, technology, and engineering industries, and in particular, biomedical products. However, the potential toxicity of carbon 60 (C60 ) at the behavioral level has not been properly evaluated. In this study, we used idTracker, a multitracking algorithm to quantitatively assess behavioral toxicity induced by C60 nanoparticles (C60 NPs) in adult zebrafish...
December 3, 2018: International Journal of Molecular Sciences
Baoyan Wu, Shihua Hou, Yongyong Xue, Zhan Chen
The study reports a facile and eco-friendly approach for nanomaterial synthesis and enzyme immobilization. A corresponding glucose biosensor was fabricated by immobilizing the gold nanoparticles (AuNPs) and glucose oxidase (GOD) multilayer films onto the polypyrrole (PPy)/reduced graphene oxide (RGO) modified glassy carbon electrode (GCE) via the electrodeposition and self-assembly. PPy and graphene oxide were first coated on the surface of a bare GCE by the electrodeposition. Then, AuNPs and GOD were alternately immobilized onto PPy-RGO/GCE electrode using the electrodeposition of AuNPs and self-assembly of GOD to obtain AuNPs-GOD multilayer films...
December 1, 2018: Nanomaterials
Janjira Praneerad, Nichaphat Thongsai, Preeyanuch Supchocksoonthorn, Sumana Kladsomboon, Peerasak Paoprasert
A recent trend in the preparation of carbon dots, optically unique nanomaterials, revolves around the use of readily-available, low-cost natural resources as precursors and their multipurpose applications. In this work, a hydrothermal method for preparing biocompatible carbon dots from radish was developed. The carbon dots were then tested for sensing of Cu2+ and acetic acid vapor. The carbon dots exhibited blue emission under UV illumination with, a quantum yield of 15%. The fluorescence emission was selectively quenched when Cu2+ ions were added, giving a detection limit of 0...
November 20, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Qin Wang, Yanfeng Zhou, Rong Fu, Yi Zhu, Bin Song, Yiling Zhong, Sicong Wu, Yu Shi, Yanyan Wu, Yuanyuan Su, Huimin Zhang, Yao He
Nanomaterial-induced autophagy has raised increasing concerns. A variety of nanomaterials, conventional or recently emerged, have the capability of inducing autophagy. As a consequence, it is becoming a popular belief that induction of autophagy is a common response of cells upon exposure to nanoscale materials. In order to clarify whether the "nanoscale" size is the determining factor for the nanomaterials to induce autophagy, we utilized in vitro cultured cells and an in vivo Caenorhabditis elegans (C...
December 4, 2018: Nanoscale
Shihai Cao, Huan Chen, Fang Jiang, Zhaoxia Hu, Xin Wang
We successfully prepared acetaldehyde-modified g-C3N4 ultrathin nanosheets (ACNNSs) by a simple ethylene glycol-assisted liquid exfoliation method. The introduction of acetaldehyde regulated the surface energy of g-C3N4 to better match with that of water, which improved the exfoliation efficiency. Moreover, the acetaldehyde introduces defects into the g-C3N4 structure, which can act as excitation energy traps and cause considerable variation in the fluorescence emission. Benefiting from the stable photoluminescence (PL) emission, good water solubility and biocompatibility, the obtained ACNNSs showed a selective fluorescent response to Ag+ both in aqueous solution and living cells...
December 4, 2018: ACS Applied Materials & Interfaces
Andrew Barrick, Nicolas Manier, Pierre Lonchambon, Emmanuel Flahaut, Nisrine Jrad, Catherine Mouneyrac, Amélie Châtel
Manufactured nanomaterials are an ideal test case of the precautionary principle due to their novelty and potential environmental release. In the context of regulation, it is difficult to implement for manufactured nanomaterials as current testing paradigms identify risk late into the production process, slowing down innovation and increasing costs. One proposed concept, namely safe(r)-by-design, is to incorporate risk and hazard assessment into the design process of novel manufactured nanomaterials by identifying risks early...
November 27, 2018: Aquatic Toxicology
Qilei Chen, Lin Zhu, Jiaxuan Chen, Tao Jiang, Huazhen Ye, Hong Ji, Siuwai Tsang, Zhongzhen Zhao, Tao Yi, Hubiao Chen
Phytotoxins refers to toxic chemicals derived from plants. They include both secondary metabolites that are dose-dependently toxic and allergens that can cause anaphylactic shock in sensitive individuals. Detecting phytotoxins in foods is increasingly important. Conventional methods for detecting phytotoxins lack sufficient sensitivity and operational convenience. Nanomaterial-based determination assays show great competence in fast and accurate sensing of trace substances. In the present review, representative phytotoxin categories of alkaloids, cyanides, and proteins are discussed...
March 30, 2019: Food Chemistry
Dalia H Samak, Yasser S El-Sayed, Hazem M Shaheen, Ali H El-Far, Mohamed E Abd El-Hack, Ahmed E Noreldin, Karima El-Naggar, Sameh A Abdelnour, Essa M Saied, Hesham R El-Seedi, Lotfi Aleya, Mohamed M Abdel-Daim
Nanoparticles (NPs) are very small particles present in a wide range of materials. There is a dearth of knowledge regarding their potential secondary effects on the health of living organisms and the environment. Increasing research attention, however, has been directed toward determining the effects on humans exposed to NPs in the environment. Although the majority of studies focus on adult animals or populations, embryos of various species are considered more susceptible to environmental effects and pollutants...
November 29, 2018: Environmental Science and Pollution Research International
Yujing Liu, Xuan Wang, Xiaohui Jiang, Xia Li, Liangmin Yu
N-Doped carbon nanomaterials have gained tremendous research interest in energy storage because of their high capacitance and chemical stability. Here, N-doped porous carbons (NPCs) with multiple shape-controlled and tunable morphologies are developed through a direct one-step pyrolysis/activation method. Typically, NPC-700-1, which is 5 nm thick and 6 μm wide, shows a high surface area (1591.5 m2 g-1) and hierarchical micro-, meso-, and macroporous architecture. The maximum specific capacitance of the as-prepared carbon nanosheets is 406 F g-1 at 1 A g-1 in KOH electrolyte...
November 29, 2018: Nanoscale
Asiya F Shaikh, Mohaseen S Tamboli, Rajendra H Patil, Ashita Bhan, Jalindar D Ambekar, Bharat B Kale
Carbon dots, very tiny carbon material with various surface passivations, have emerged as a new class of nanomaterials for various applications. Herein, we describe a simple, economical, and green approach for the synthesis of colloidal luminescent carbon dots (C-dots) by solvothermal method from fruit juice of Citrus limetta , an abundantly available plant in Asian countries. The existence of C-dots was confirmed by X-ray Diffraction and High Resolution Transmission Electron Microscopy studies. The C-dots size was observed to be 2-4 nm...
April 1, 2019: Journal of Nanoscience and Nanotechnology
Jia-Hui Liu, Yanli Wang, Gui-Hua Yan, Fan Yang, Haidi Gao, Yanan Huang, Haifang Wang, Ping Wang, Liju Yang, Yongan Tang, Lindsay Rose Teisl, Ya-Ping Sun
Carbon dots (CDots) in a general structure of small carbon nanoparticles with various surface passivation schemes have emerged to represent a new class of carbon nanomaterials in now a rapidly advancing and expanding research field. Among various synthesis methods, the use of pre-processed and selected small carbon nanoparticles for deliberate chemical functionalization of the particle surface with organic molecules have produced high-performance and structurally better defined CDots. Specifically, small organic molecules 2,2'-(ethylenedioxy)bis(ethylamine) and 3-ethoxypropylamine were used for the effective surface passivation of the carbon nanoparticles via chemical functionalization to yield CDots that are brightly fluorescent and also structurally ultra-compact, amenable to various desired cell imaging applications...
April 1, 2019: Journal of Nanoscience and Nanotechnology
Rubbel Singla, Chandni Sharma, Ashish K Shukla, Amitabha Acharya
In the modern era, research on the synthesis of nanoparticles (NPs) has been growing exponentially. Due to their small size together with extra-ordinary physico-chemical properties, a variety of NPs i.e., metallic, carbon-based, fluorescent, and polymer-based have been exploited in different fields such as tissue engineering, drug delivery, and various other therapeutic applications. Instead of multi-disciplinary applications of NPs, research dealing with the toxicity concerns and influence of such materials, on the public health, plants and environment is still in its infancy...
April 1, 2019: Journal of Nanoscience and Nanotechnology
Wonjun Jang, Hyun A Cho, Kyungwho Choi, Yong Tae Park
Recently, with the miniaturization of electronic devices, problems with regard to the size and capacity of batteries have arisen. Energy harvesting is receiving significant attention to solve these problems. In particular, the thermoelectric generator (TEG) is being studied for its ability to harvest waste heat energy. However, studies on organic TEGs conducted thus far have mostly used conductive polymers, making the application range of TEGs relatively narrow. In this study, we fabricated organic TEGs using carbonaceous nanomaterials (i...
November 28, 2018: Micromachines
Siyuan Li, Song Yue, Chao Yu, Yiyu Chen, Dong Yuan, Qiubo Yu
In this study, a new, simple, and label-free electrochemical immunosensor was presented for the detection of nuclear matrix protein-22 (NMP-22). In order to accurately monitor very small amounts of NMP-22, it was advantageous to use highly efficient nanomaterials as signals. For this reason, we synthesized a chrysanthemum-like nanocomposite (Co-MOFs/CuAu NWs), using Co-based metal-organic frameworks (Co-MOFs) as carriers and copper gold nanowires (CuAu NWs) wrapped around their surface, which was applied for modifying a glassy carbon electrode (GCE)...
November 27, 2018: Analyst
Erik J Leonhardt, Jeff M Van Raden, David Miller, Lev N Zakharov, Benjamín Alemán, Ramesh Jasti
Extended carbon nanostructures, such as carbon nanotubes (CNTs), exhibit remarkable properties but are difficult to synthesize uniformly. Herein, we present a new class of carbon nanomaterials constructed via the bottom-up self-assembly of cylindrical, atomically precise small molecules. Guided by supramolecular design principles and circle packing theory, we have designed and synthesized a fluorinated nanohoop that, in the solid state, self-assembles into nanotube-like arrays with channel diameters of precisely 1...
November 30, 2018: Nano Letters
Zhiqi Li, Chunyu Liu, Xinyuan Zhang, Guanhua Ren, Wenbin Han, Wenbin Guo
To overcome the zigzag pathway transport of the electron diffusion process and eliminate the surface trap states of phenyl-C61-butyric acid methyl ester (PCBM) nanofilms in inverted perovskite solar cells, novel 1D N-type doped carbon nanorods (CNRs) are developed by a stibonium (Sb) auxiliary ball milling method and introduced into the PCBM film to prepare the PCBM:Sb-CNRs hybrid transport layer. In this way, the N-type doped Sb-CNRs can extend the built-in electric field between CH3 NH3 PbI3 and PCBM to facilitate the separation of electron/hole pairs...
November 27, 2018: Small
Jie Xia, Shuai Chen, Guang-Yue Zou, Yong-Liang Yu, Jian-Hua Wang
Great efforts have been made to develop facile and efficient methods to prepare carbonaceous nanostructures with long-wavelength emission. Herein, we report a low-temperature aqueous strategy to synthesize red-emissive carbon polymer dots (R-CPDs) through the regulation of oxidative polymerization of p-phenylenediamine at 80 °C. The morphology, chemical composition and photophysical properties of the R-CPDs are characterized and analyzed in detail, thereby elucidating their photoluminescence origins from the surface state and crosslink enhanced emission effect...
November 27, 2018: Nanoscale
Xin Bao, Ye Yuan, Jingqin Chen, Bohan Zhang, Di Li, Ding Zhou, Pengtao Jing, Guiying Xu, Yingli Wang, Kateřina Holá, Dezhen Shen, Changfeng Wu, Liang Song, Chengbo Liu, Radek Zbořil, Songnan Qu
Carbon dots that exhibit near-infrared fluorescence (NIR CDs) are considered emerging nanomaterials for advanced biomedical applications with low toxicity and superior photostability and targeting compared to currently used photoluminescence agents. Despite progress in the synthesis of NIR CDs, there remains a key obstacle to using them as an in vivo theranostic agent. This work demonstrates that the newly developed sulfur and nitrogen codoped NIR CDs are highly efficient in photothermal therapy (PTT) in mouse models (conversion efficiency of 59%) and can be readily visualized by photoluminescence and photoacoustic imaging...
2018: Light, Science & Applications
Anjali Chauhan, Devendra Sillu, Shekhar Agnihotri
BACKGROUND: The limitless presence of pharmaceutical contaminants in discharged wastewater has emerged as a threat to aquatic species and humans. Their presence in drinking water has although raised substantial concerns, very little is known about the fate and ecological impacts of these pollutants. As a result, these pollutants are inevitably introduced to our food chain at trace concentrations. Unfortunately, the conventional wastewater treatment techniques are unable to treat pharmaceuticals completely with practical limitations...
November 26, 2018: Current Drug Metabolism
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