Article
Chemistry, Physical
Eunji Kim, Byeong-Joo Lee, Kathleen Maleski, Yoonjeong Chae, Yonghee Lee, Yury Gogotsi, Chi Won Ahn
Summary: This study presents a method for fabricating on-chip symmetric MSCs with coplanar interdigitated electrodes using focused-ion-beam process and carbon nanotube electrodes. The micro supercapacitors produced have high areal capacitance with narrow gaps between electrode fingers, while electron beam lithography and photolithography are utilized to create ultra-small footprint devices.
Article
Multidisciplinary Sciences
Thanh Luan Phan, Sohyeon Seo, Yunhee Cho, Quoc An Vu, Young Hee Lee, Dinh Loc Duong, Hyoyoung Lee, Woo Jong Yu
Summary: In this article, the authors introduce a robust method for fabricating vertical 1D-0D-1D vdWI memories with ultra-small junction areas. The memories exhibit high performance and are achieved through cross-stacking carbon nanotubes.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Igor Bychko, Anastasiia Bazylevska, Vyacheslav Khavrus, Jianguo Tang, Peter Strizhak
Summary: A series of carbon-encapsulated Ni nanoparticles deposited on carbon nanotubes (Ni@CNT) were prepared using a simple impregnation method and characterized by physicochemical methods. The catalytic performance of Ni@CNT was found to be strongly influenced by the Ni concentration, with samples containing 1% Ni showing the highest activity in model reactions. The study demonstrates that the facile fabrication of Ni@CNT produces efficient catalysts for the hydrogenation of organic compounds using molecular hydrogen, with the catalytic properties primarily associated with the carbon surface and enhanced by the Schwab effect.
JOURNAL OF CATALYSIS
(2023)
Article
Construction & Building Technology
Oguzhan Ozturk
Summary: The study investigated the self-sensing behavior of reinforced geopolymer concrete beams produced at ambient curing with tailored electrical properties. CNT-based beams significantly enhanced load-carrying capacity and ductility compared to CB-based beams, as shown by microstructural and experimental results. This indicates that CNT-based beams are more responsive to changes in strain and applied load compared to CB-based beams.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Xuyao Zhang, Weiguo Li, Mengqing Yang, Ziyuan Zhao, Yi He, Shifeng Zheng, Jianzuo Ma, Liming Chen
Summary: This study presents a model to predict the temperature-dependent tensile strength of carbon nanotube/polymer nanocomposites (CPNCs). The model takes into account the effects of carbon nanotube networks and waviness, and shows good agreement with existing experimental data. Additionally, the study quantitatively analyzes the influences of carbon nanotube networks, waviness, and temperature on the tensile strength of CPNCs.
Article
Materials Science, Ceramics
Reyhaneh Reyhani, Ali Zadhoush, Nooshin Salman Tabrizi, Hossein Nazockdast, Mohammadreza Naeimirad
Summary: Carbon aerogel (CA) and CNT-doped carbon aerogel (CNT-CA) were synthesized and characterized in this study, with CNT-CA showing higher specific surface area and total pore volume, leading to better electrochemical properties compared to CA. Grinding of the aerogels into powder form had no negative impact on their physical structure and morphology.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Xinrui Yu, Wenjing Qin, Xinxin Li, Yanli Wang, Changshun Gu, Junji Chen, Shougen Yin
Summary: Flexible conductive hydrogel sensors have attracted attention due to their stretchability, sensitivity, self-repairing capacity, and compatibility in the wearable field. Researchers have developed a highly responsive conductive hydrogel by adding silver nanoparticle modified carbon nanotubes to polyvinyl alcohol/borax hydrogel. This hydrogel exhibits excellent responsiveness to temperature and is capable of detecting changes in water temperature and hydraulic pressure.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Joel Hubbard, Tugba Isik, Troy Y. Ansell, Volkan Ortalan, Claudia Luhrs
Summary: This study investigates the synthesis of rare-earth oxide nanoparticles on carbon nanotube walls to increase contrast for validating the electrical properties of nanocomposites. The adherence of nanoparticles to CNT walls was documented through transmission electron microscopy and crystalline phases were identified using X-ray diffraction. Verification of deep ultraviolet-induced fluorescence of Eu:Y2O3-CNT nanostructures was conducted, and the impacts of dopant introduction on nanocomposite electrical properties were characterized. The study also compared scanning electron microscopy imaging and micro-CT scans of composites with and without synthesized nanoparticles to show improved contrast and detection of CNT bundles.
Review
Chemistry, Multidisciplinary
Mohammad Hamidul Islam, Shaila Afroj, Mohammad Abbas Uddin, Daria Andreeva, Kostya S. Novoselov, Nazmul Karim
Summary: Graphene and carbon nanotubes have shown great potential in enhancing the properties of fiber-reinforced polymer composites. However, the effective incorporation of these carbon nanomaterials without compromising the performance of the composites remains challenging.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Electrochemistry
Juan Wen, Huhu Chang, Ting Huang, Masud Hossain, Zaichun Liu, Haodong Sun, Yusong Zhu, Yuhui Chen, Qinghong Huang, Yuping Wu
Summary: The industrial synthesis of ammonia relies heavily on the Haber-Bosch process, which has significant energy consumption and CO2 emissions. Electrochemical nitrogen-to-ammonia conversion offers a promising alternative powered by renewable energy, but developing suitable catalysts remains a major challenge.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Erfan Zal Nezhad, Xiang Qu, Farayi Musharavati, Fadi Jaber, Mark R. Appleford, S. Bae, Kaan Uzun, Morgan Struthers, Muhammad E. H. Chowdhury, Amith Khandakar
Summary: In this study, hydroxyapatite/titanium nanotube/carbon nanotube (HA/TNT/CNT) nanocomposites with different CNT contents were fabricated and their mechanical properties, biocompatibility, and tribological characteristics were investigated. The results showed that HA/TNT/CNT with higher CNT content exhibited improved mechanical properties and reduced wear debris volume, with no cytotoxicity in in-vitro biocompatibility tests.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Coatings & Films
Ankit Krishna, L. S. Aravinda, A. Murugan, N. Sharath Kumar, Mamilla Ravi Sankar, Nagahanumaiah, K. Niranjan Reddy, N. Balashanmugam
Summary: Heat dissipation is a major obstacle to the miniaturization of electronic components. This research focuses on the development of novel thin-film nanocomposites consisting of Carbon nanotubes (CNTs) as thermal interface materials (TIMs). The experimental results show that the new nanocomposites have significantly improved thermal conductivity, which is of great significance for enhancing the performance of electronic components.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Automation & Control Systems
Vicente Gerlin Neto, Cristian Guilherme Barbosa Pereira, Felipe Dias Faglioni, Carlos Alberto Fortulan, Cesar Renato Foschini
Summary: Zirconia is widely used in engineering applications, but its tetragonal stabilised phase (TZP) suffers from low fracture toughness. Recent research has focused on enhancing its toughness by adding other components to the ceramic matrix. This study produced composite materials by adding carbon nanotubes (CNTs) to a zirconia matrix and analyzed their properties. The composites showed good results, with intact CNTs and high density, but a slight loss in hardness compared to pure zirconia.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
M. N. Barshutina, S. O. Kirichenko, V. A. Wodolajsky, A. Lopachev, S. N. Barshutin, O. Gorsky, K. Deriabin, A. A. Sufianov, D. Bulgin, R. M. Islamova, A. G. Tkachev, P. E. Musienko
Summary: This communication presents a detailed description of a technology for manufacturing stretchable and biointegrated neuronal implants using carbon nanotubes and poly(dimethylsiloxane). The technology involves the fabrication of PDMS-CNT composite materials with excellent biocompatibility, biostability, tensile strength, and charge storage capacity. The implants showed high efficiency in monitoring and stimulating neuronal activity in mammals, as demonstrated by in vivo tests on laboratory animals.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Ying Tian, Tao Wang, Qingxia Zhu, Xingcai Zhang, Anita Sagadevan Ethiraj, Wen-Ming Geng, Hong-Zhang Geng
Summary: This paper reports on the simultaneous enhancement of the conductivity, roughness, and adhesion properties of transparent conductive films with PEDOT: PSS/CNTs, which were successfully used to produce high-performance OLEDs. The film demonstrated high transmittance, low sheet resistance, excellent adhesion, and low roughness, while significantly extending the lifetime of the OLEDs. Incorporating CNTs within PEDOT: PSS electrodes shows great potential for improving the performance of OLED devices.
Article
Multidisciplinary Sciences
Yang Qiu, Patrick Lamers, Vassilis Daioglou, Noah McQueen, Harmen-Sytze de Boer, Mathijs Harmsen, Jennifer Wilcox, Andre Bardow, Sangwon Suh
Summary: Direct air capture is crucial for achieving stringent climate targets, but its large-scale deployment may lead to environmental problem-shifting. Decarbonizing the electricity sector and improving DAC technology are both necessary to avoid this problem. The environmental impact and climate performance of DAC depend on sectoral mitigation actions, and therefore, decarbonization targets should not be relaxed.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Jingyi Xu, Xianjun Tan, Wenhui Ding, Arturo A. Keller, Yuxiong Huang
Summary: An external oxidant-free system was developed to generate reactive oxygen species (ROS) for the decontamination of antibiotics in natural water systems. Cobalt-doped Fe3S4 nanoflowers were designed and synthesized, which showed superior ability to adsorb and activate oxygen molecules. The use of these nanoflowers resulted in a significant improvement in the degradation rate of sulfamethoxazole and boosted the degradation efficiency of antibiotics. This study provides a new strategy for the control of emerging organics in water systems and sheds light on the mechanisms of in-situ ROS generation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Caroline P. Vignardi, Adeyemi S. Adeleye, Mohsen Kayal, Ekene Oranu, Robert J. Miller, Arturo A. Keller, Patricia A. Holden, Hunter S. Lenihan
Summary: Environmental conditions in aquatic ecosystems play a significant role in transforming toxic chemicals, such as copper nanoparticles, and influencing their bioavailability and toxicity. This study investigated the accumulation and toxicity of aged nano-Cu in marine phytoplankton, and found that the dissolution rate of nano-Cu decreased during the first 4 weeks before increasing rapidly after 15 weeks. The toxicity of nano-Cu to phytoplankton decreased with particle aging from 0 to 4 weeks, but increased significantly after 15 weeks due to elevated Cu dissolution.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Editorial Material
Nanoscience & Nanotechnology
Arturo A. Keller, Alex Ehrens, Yuanfang Zheng, Bernd Nowack
NATURE NANOTECHNOLOGY
(2023)
Review
Environmental Sciences
Arturo A. Keller, Kendra Garner, Nalini Rao, Eladio Knipping, Jeffrey Thomas
Summary: Global changes, such as climate and land use changes, have significant impacts on water resources. In order to plan for these changes, it is necessary to make projections and evaluate different hydrologic and water quality models. Among the models evaluated, MIKE-SHE, HEC-HMS, MODHMS, SWAT, and WARMF stand out in terms of functionality, availability, applicability, and support.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Engineering, Environmental
Mudi Zhai, Bomin Fu, Yuhui Zhai, Weijie Wang, Amy Maroney, Arturo A. Keller, Hongtao Wang, Jean-Marc Chovelon
Summary: The coexistence of pharmaceuticals and heavy metals poses a serious threat to aquatic environments. Adsorbents have been widely used for the simultaneous removal of pharmaceuticals and metals from water. The effectiveness of the adsorption process depends on various factors such as the characteristics of the adsorbents and contaminants, temperature, pH, inorganic ions, and natural organic matter. Bridging and competition effects play significant roles in promoting or inhibiting the adsorption process. This review provides valuable insights into the theoretical knowledge in this field and may contribute to the prevention and control of the coexistence of pharmaceuticals and heavy metals in wastewater.
Article
Green & Sustainable Science & Technology
Marvin Bachmann, Christian Zibunas, Jan Hartmann, Victor Tulus, Sangwon Suh, Gonzalo Guillen-Gosalbez, Andre Bardow
Summary: The rapid growth of plastics production worsens the triple crisis of habitat loss, plastic pollution, and greenhouse gas emissions. Circular strategies to achieve net-zero GHG emissions have been proposed, but their implications for overall sustainability have not been studied on a global scale. This study links a comprehensive model of plastic production and end-of-life treatment to the planetary boundaries framework and finds that even a circular, climate-optimized plastics industry exceeds sustainability thresholds by up to four times. However, improving recycling technologies and rates, combined with biomass and CO2 utilization, can bring plastics into their safe operating space by 2030. Still, achieving absolute sustainability for plastics requires fundamental changes in production and use methods.
NATURE SUSTAINABILITY
(2023)
Article
Agriculture, Multidisciplinary
Weiwei Li, Arturo A. Keller
Summary: This study optimized a targeted plant proteomics approach by developing and optimizing signature peptide selection, liquid chromatography with tandem mass spectrometry (LC-MS/MS) analysis method, and sample preparation method. Different protein extraction and precipitation methods, as well as digestion methods, were evaluated. The results showed that the phenol extraction method using fresh plant tissue, coupled with trypsin digestion, was the best sample preparation method for targeted proteomics studies. The optimized approach yielded higher peptide concentrations and detected additional signature peptides. This study provides a workflow for optimizing targeted proteomics studies.
ACS AGRICULTURAL SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Applied
Arturo A. Keller
Summary: Inorganic nanomaterials such as TiO2 and ZnO provide effective UV protection, but concerns about their potential health and ecological implications have arisen. However, most studies suggest that the risks associated with these materials are minimal and their impact on human and environmental health is limited. Further research is needed to assess if sensitive habitats are at an elevated risk.
INTERNATIONAL JOURNAL OF COSMETIC SCIENCE
(2023)
Article
Environmental Sciences
Violaine Desgens-Martin, Weiwei Li, Taylor Medina, Arturo A. Keller
Summary: Modeling and field sampling are important for assessing PFAS sources and risks. Legacy and newer PFAS were detected in wastewater treatment plant samples. Predictive models were used to estimate PFAS loads and population size and urban land use were found to be predictors of PFAS loads. The study demonstrates the practicality of using predictive models and field sampling for assessing PFAS risks.
Article
Food Science & Technology
Yiming Su, Xuefei Zhou, Huan Meng, Tian Xia, Haizhou Liu, Philippe Rolshausen, Caroline Roper, Joan E. McLean, Yalei Zhang, Arturo A. Keller, David Jassby
Summary: Nanotechnology-based approaches have shown promising results in sustainable agriculture, particularly in the development of fertilizers and pesticides. It is crucial to assess the economic and environmental benefits of these nanoformulations, and improving their efficiency is necessary for widespread adoption.
Article
Agriculture, Multidisciplinary
Xiangning Huang, Arturo A. Keller
Summary: This study investigated the physiological, nutritional, and metabolomic responses of wheat plants to two surfactants. The results showed that the application of Green SA at the flag leaf stage had a greater impact on plant defense system and nitrogen and carbon metabolism compared to Nonionic SA.
ACS AGRICULTURAL SCIENCE & TECHNOLOGY
(2022)
Review
Food Science & Technology
Lijuan Zhao, Tonghao Bai, Hui Wei, Jorge L. Gardea-Torresdey, Arturo Keller, Jason C. White
Summary: This review examines the use of ROS-scavenging and ROS-triggering nanomaterials to enhance stress resistance in plants. It discusses the delivery pathways of these nanomaterials and highlights the potential of nanobiotechnology in engineering crops with improved stress tolerance.
Article
Chemistry, Multidisciplinary
Wei Liu, Mengting Li, Weiwei Li, Arturo A. Keller, Vera Slaveykova
Summary: This study investigates the metabolic perturbations in green alga C. reinhardtii exposed to different sizes and concentrations of nTiO(2). The results show that nTiO(2) exposure induces perturbations in amino acid, nucleotide, fatty acid metabolism, among others, but does not affect photosynthesis. The perturbations are size and concentration-dependent and also impact the overall nutrition of the microalgal cell.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Environmental Sciences
Qian Gao, Arturo A. Keller
Summary: Using recyclable magnetic nanoparticles for virus disinfection can improve disinfection efficiency, with stability and recyclability for multiple cycles.
