Article
Chemistry, Multidisciplinary
Hongjie Zhang, Wenhuai Zhuge, Feng Yang, Lixing Kang, Shuchen Zhang, Ran Du, Jinjie Qian, Zhi Yang, Yagang Yao, Pan Li, Yue Hu, Jin Zhang
Summary: The article introduces a temperature-mediated method to achieve high-density and specific diameter SWNT arrays. This method can increase the density of the array and control the diameter by reactivating poisoned catalysts to continue the growth of SWNTs. This provides a possibility for the integration of SWNTs into nanodevices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Ruiting Chen, Yafei Xue, Xinyue Xu, Hui Yang, Tengfei Qiu, Lingling Shui, Xin Wang, Guofu Zhou, Michael Giersig, Sacha Pidot, James A. Hutchison, Eser Metin Akinoglu
Summary: This study presents a lithography-free method for fabricating carbon nanotube arrays with tunable pitch and size. The pitch of the periodic arrays can be controlled by the diameter of silica particles, while the size of individual nanotubes can be adjusted by the catalyst particle size and reaction time.
Article
Materials Science, Multidisciplinary
Georgy A. A. Ermolaev, Ying Xie, Liu Qian, Mikhail K. K. Tatmyshevskiy, Aleksandr S. S. Slavich, Aleksey V. V. Arsenin, Jin Zhang, Valentyn S. S. Volkov, Alexander I. I. Chernov
Summary: This article presents the first measurement of the anisotropic optical constants of monolayer aligned SWCNTs, revealing a large birefringence and high dichroism. The optical response of aligned SWCNTs monolayer can be described by an effective medium approximation using the graphene dielectric function. It also provides a universal approach for determining the carbon concentration in nanotube structures.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Kevin Laughlin, Richard R. Vanfleet, Robert C. Davis
Summary: Researchers have developed VACNT/carbon composite films with higher stiffness and strength than pure VACNTs, while maintaining low reflectance. These composites can withstand water exposure and handling, making them a promising material.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Emily Schifano, Gianluca Cavoto, Francesco Pandolfi, Giorgio Pettinari, Alice Apponi, Alessandro Ruocco, Daniela Uccelletti, Ilaria Rago
Summary: The emergence of multidrug-resistant bacteria is a growing threat to public health, necessitating the development of non-antibiotic antibacterial approaches. In this study, vertically aligned carbon nanotubes (VA-CNTs) with controlled nanomorphology were proposed as effective platforms for bacteria eradication. Through a combination of microscopic and spectroscopic techniques, the topography of VA-CNTs was tailored in a controlled and time-efficient manner using plasma etching processes. The highest reduction in cell viability was observed for VA-CNTs modified using plasma etching with Ar and O-2, indicating their potential as a surface for inactivating both planktonic and biofilm infections.
Article
Chemistry, Physical
Fangqian Han, Liu Qian, Qianru Wu, Dong Li, Shulan Hao, Lihu Feng, Liantao Xin, Tao Yang, Jin Zhang, Maoshuai He
Summary: A SiC supported iron (Fe-SiC) catalyst was developed for efficient growth of carbon nanotubes. The reducibility of the catalyst was enhanced by physical contact with oxide support, promoting the formation of active Fe nanoparticles for subsequent carbon nanotube synthesis.
Article
Chemistry, Physical
Xueting Zhang, Liu Qian, Xiaojing Yao, Lili Zhang, Qianru Wu, Dong Li, Chen Ma, Nan Zhao, Liantao Xin, Chang Liu, Xiuyun Zhang, Jin Zhang, Maoshuai He
Summary: The past two decades have seen significant progress in the catalytic synthesis of single-walled carbon nanotubes (SWNTs) using non-conventional nanoparticles. This study presents the use of a solid magnesia (MgO) supported ruthenium (Ru) catalyst for chemical vapor deposition (CVD) growth of SWNTs. The results show successful synthesis of enriched (6, 5) SWNTs at high temperatures, partially attributed to the high activity of Ru clusters. The study also reveals the mechanism behind the activation of Ru clusters through charge transfer from the MgO support.
Article
Engineering, Biomedical
Luis Nascimento, Cristiana Fernandes, Ricardo. M. Silva, Angela Semitela, Barbara M. de Sousa, Paula A. A. P. Marques, Sandra I. Vieira, Rui. F. Silva, Nathalie Barroca, Gil Goncalves
Summary: A novel therapeutic approach based on carbon nanotubes (CNTs) is explored in this study to enhance the regeneration of neural cells. Different morphologies of CNTs are created and tested for their ability to stimulate the formation of neurons and networks. The findings provide a new avenue for the construction of electroresponsive scaffolds for neural tissue engineering.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Engineering, Environmental
Hong Wang, Sha Zhu, Zhanshuo Dai, Xinze Li, Taigang Zhou
Summary: A low cost and green catalyst (Co/RH-SiO2) using rice husk-derived SiO2 as support selectively synthesized large diameter single-walled carbon nanotubes (SWCNTs) with a percentage of 70.7% at 950 degrees Celsius. The catalyst had abundant small mesopores (2-4 nm) and reducible Co hydrosilicate and surface Co silicates highly dispersed in the pore structures, resulting in the growth of large-diameter SWCNTs. This study provides insights for the development of low cost and green catalysts for selective growth of SWCNTs from biomass waste.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Nanoscience & Nanotechnology
August Kohls, Mackenzie Maurer Ditty, Fahimeh Dehghandehnavi, Si-Yang Zheng
Summary: Vertically aligned carbon nanotubes (VACNTs) have numerous advantages that make them highly desirable in biomedical applications. This review discusses the utilization of VACNTs in sensing, biomolecule filtration systems, cell stimulation, regenerative medicine, drug delivery, and bacteria inhibition, and compares them to the traditionally nonaligned, randomly oriented nanotubes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Muhammad Adeel Ashraf, Karol Vegso, Ashin Shaji, Michal Bodik, Mayela Garcia Sanchez, Muhammad Zubair, Muhammad Faraz Ud Din, Eva Majkova, Andrea Strakova Fedorkova, Jozef Keckes, Peter Siffalovic
Summary: The use of a highly engineered bilayer of single-walled carbon nanotubes (SWCNTs) on conventional glass fiber separators significantly suppresses the polysulfide shuttle effect in lithium-sulfur batteries, leading to improved battery performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chaminda P. Nawarathne, Abdul Hoque, Chethani K. Ruhunage, Connor E. Rahm, Noe T. Alvarez
Summary: This study presents a method for achieving chemical bonding of CNTs to metal substrates at low temperatures, bypassing the need for high temperature treatments, and successfully establishing direct connections between CNTs and metal substrates. By functionalizing metal substrates with organic species and carefully controlling the process, successful chemical bonding between CNTs and metal substrates was achieved, opening up new possibilities for electronic applications.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Da-Chi Yang, Richard J. J. Castellano, Ricardo Prada Silvy, Sathish K. K. Lageshetty, Robert F. F. Praino, Francesco Fornasiero, Jerry W. W. Shan
Summary: This study reports on the first macroscopic membranes with vertically oriented, subnanometer carbon nanotube (CNT) pores, which show enhanced water flow. The membranes, made using a scalable, solution-based method, exhibit fast pressure-driven water transport with up to 10^5-fold enhancement compared to conventional flow. The results also show that the hydrodynamic slip lengths increase with decreasing nanotube diameter, suggesting that water transport in small-diameter CNTs is dominated by entrance resistance.
Article
Chemistry, Multidisciplinary
Guoqing Cheng, Takuya Hayashi, Yuya Miyake, Takashi Sato, Hiroshi Tabata, Mitsuhiro Katayama, Naoki Komatsu
Summary: In this work, host molecules called nanotweezers and nanocalipers were used to separate carbon nanotubes through host-guest complexation. The interlocking of the host molecules with the carbon nanotubes was confirmed through various techniques, and the interlock was easily released through demetalation. The diameter selectivity of the separation process was evaluated using Raman, photoluminescence, and absorption spectroscopy.
Article
Chemistry, Physical
A. Andalouci, Y. Roussigne, L. Gangloff, P. Legagneux, S. Farhat, S. M. Cherif
Summary: In this study, vertically aligned multiwalled carbon nanotubes (MWCNTs) filled with Co magnetic nanowires were synthesized in a one-step process using bias-assisted plasma enhanced chemical vapor deposition (PECVD) method. The growth, alignment, and filling of the carbon nanotubes were achieved simultaneously by applying a negative bias to the substrate. The structural investigations revealed the growth mechanisms, and the analysis confirmed the presence of Co, Pd, C, N, and O in the nanotubes. The hysteresis cycles exhibited ferromagnetic behavior, with higher coercive field values observed for nail-shaped Co nanoparticles embedded in the CNTs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Peter Benedek, Ola K. Forslund, Elisabetta Nocerino, Nuri Yazdani, Nami Matsubara, Yasmine Sassa, Fanni Juranyi, Marisa Medarde, Mark Telling, Martin Mansson, Vanessa Wood
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Burak Guzelturk, James K. Utterback, Igor Coropceanu, Vladislav Kamysbayev, Eric M. Janke, Marc Zajac, Nuri Yazdani, Benjamin L. Cotts, Suji Park, Aditya Sood, Ming-Fu Lin, Alexander H. Reid, Michael E. Kozina, Xiaozhe Shen, Stephen P. Weathersby, Vanessa Wood, Alberto Salleo, Xijie Wang, Dmitri Talapin, Naomi S. Ginsberg, Aaron M. Lindenberg
Article
Nanoscience & Nanotechnology
Nuri Yazdani, Sebastian Volk, Olesya Yarema, Maksym Yarema, Vanessa Wood
Article
Multidisciplinary Sciences
Nuri Yazdani, Samuel Andermatt, Maksym Yarema, Vasco Farto, Mohammad Hossein Bani-Hashemian, Sebastian Volk, Weyde M. M. Lin, Olesya Yarema, Mathieu Luisier, Vanessa Wood
NATURE COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Laura Piveteau, Marcel Aebli, Nuri Yazdani, Marthe Millen, Lukas Korosec, Franziska Krieg, Bogdan M. Benin, Viktoriia Morad, Christophe Piveteau, Toni Shiroka, Aleix Comas-Vives, Christophe Coperet, Aaron M. Lindenberg, Vanessa Wood, Rene Verel, Maksym Kovalenko
ACS CENTRAL SCIENCE
(2020)
Article
Chemistry, Physical
Sebastian Volk, Nuri Yazdani, Vanessa Wood
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Multidisciplinary Sciences
Burak Guzelturk, Benjamin L. Cotts, Dipti Jasrasaria, John P. Philbin, David A. Hanifi, Brent A. Koscher, Arunima D. Balan, Ethan Curling, Marc Zajac, Suji Park, Nuri Yazdani, Clara Nyby, Vladislav Kamysbayev, Stefan Fischer, Zach Nett, Xiaozhe Shen, Michael E. Kozina, Ming-Fu Lin, Alexander H. Reid, Stephen P. Weathersby, Richard D. Schaller, Vanessa Wood, Xijie Wang, Jennifer A. Dionne, Dmitri Talapin, A. Paul Alivisatos, Alberto Salleo, Eran Rabani, Aaron M. Lindenberg
Summary: A study reveals that transient lattice deformations are observed in photoexcited nanocrystals, with surface deformations induced by localized charges at trap sites. The structural distortions are influenced by the excitation energy, showing different behaviors when the photon energy is above or close to the bandgap.
NATURE COMMUNICATIONS
(2021)
Review
Engineering, Electrical & Electronic
Mengxia Liu, Nuri Yazdani, Maksym Yarema, Maximilian Jansen, Vanessa Wood, Edward H. Sargent
Summary: The article reviews the development of colloidal quantum dot electronics, focusing on the role of surface chemistry in suppressing non-radiative processes, controlling light-matter interactions, and regulating carrier transport properties. It also highlights the prospects of new classes of colloidal quantum dots and superlattices for emerging applications.
NATURE ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Nikola Dordevic, Raphael Schwanninger, Maksym Yarema, Stefan Koepfli, Olesya Yarema, Yannick Salamin, Nolan Lassaline, Bojun Cheng, Nuri Yazdani, Alexander Dorodnyy, Yuriy Myronovych Fedoryshyn, Vanessa Wood, Juerg Leuthold
Summary: Efficient and engineered photodetectors using colloidal quantum dots and metasurface enhancement are reported. The photodetectors and photodiodes showed high responsivities and faster responses, thanks to the metasurface design. The metasurface improved the absorption and enabled photogain, resulting in high performance photoconductors and photodiodes.
Article
Multidisciplinary Sciences
Gabriele Raino, Nuri Yazdani, Simon C. Boehme, Manuel Kober-Czerny, Chenglian Zhu, Franziska Krieg, Marta D. Rossell, Rolf Erni, Vanessa Wood, Ivan Infante, Maksym Kovalenko
Summary: Semiconductor quantum dots, considered as artificial atoms, have broader emission spectrum than atomic emission lines. By simulating the interactions between excitons and surface phonons, the emission line-broadening in quantum dots can be controlled.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Shelby A. Cuthriell, Shobhana Panuganti, Craig C. Laing, Michael A. Quintero, Burak Guzelturk, Nuri Yazdani, Boubacar Traore, Alexandra Brumberg, Christos D. Malliakas, Aaron M. Lindenberg, Vanessa Wood, Claudine Katan, Jacky Even, Xiaoyi Zhang, Mercouri G. Kanatzidis, Richard D. Schaller
Summary: The interplay between the structural and photophysical properties of metal halide perovskites is critical to their usefulness in optoelectronics. In this study, the structural dynamics of 2D perovskites (BA)2PbI4 and (PEA)2PbI4 were investigated using ultrafast transient X-ray diffraction. The results showed that the lattice underwent transient relaxation and ordering upon optical excitation, leading to a narrowing of the photoluminescence linewidth and a slight redshift in the optical bandgap. These findings provide insight into the lattice response of 2D perovskites upon excitation.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jihoon Han, Jemin Lee, Seonghyeon Kim, Anna Lee, Hyung Gyu Park, Youn Soo Kim
Summary: Nasal mucus is important for the sense of smell as it absorbs and transports chemicals to olfactory receptors. Inspired by its unique properties, a polymeric organogel with similar viscosity was developed and analyzed. The viscosity of the matrix mainly affects the absorption and retention of VOCs, not their diffusion. Additionally, the vapor pressure of VOCs influences the absorption and retention efficiencies. A detailed understanding of mucus properties and the use of sol-gel transition enabled the creation of an efficient VOC absorbent and retention agent.
Article
Polymer Science
Taehun Chung, Jihoon Han, Young Jae Kim, Kyeong-Jun Jeong, Jun Mo Koo, Jemin Lee, Hyung Gyu Park, Taiha Joo, Youn Soo Kim
Summary: The effect of Hofmeister anions on the lower critical solution temperature (LCST) of two structural isomers, PNIPAAm and PiPOx, was studied. Salt type and concentration were found to have different effects on the LCST of the polymers. Raman spectroscopy and two-dimensional correlation spectroscopy were used to examine the conformational changes in the polymers. It is necessary to design the polymer structure to enhance the anion effect.
Article
Engineering, Electrical & Electronic
Yunhua Xing, Nuri Yazdani, Weyde M. M. Lin, Maksym Yarema, Raphael Zahn, Vanessa Wood
Summary: Understanding the impact of positional and energetic disorders on charge transport in nanocrystal quantum dot thin films is crucial for the synthesis and fabrication of these materials for electronics. Through computational simulations, the study found that the type of positional disorder and its effect on the spacing between neighboring nanocrystals have different impacts on charge transport. Short inter-nanocrystal distances enhance mobility, while random packing and energetic disorders decrease mobility.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Weyde M. M. Lin, Nuri Yazdani, Olesya Yarema, Maksym Yarema, Mengxia Liu, Edward H. Sargent, Thomas Kirchartz, Vanessa Wood
Summary: Significant performance improvements have been achieved in nanocrystal-based solar cells in the past decade, but challenges such as surface recombination, dopants, and electronic defects still limit their potential. Strategies for enhancing device performance include reducing dopants, controlling doping and electronic structure, and optimizing interfaces.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
