Article
Chemistry, Physical
Olga Sedelnikova, Vitalii Sysoev, Olga A. Gurova, Yurii P. Ivanov, Victor O. Koroteev, Raul Arenal, Anna A. Makarova, Lyubov G. Bulusheva, Alexander Okotrub
Summary: This study investigates the sensing properties of sulfur-modified SWCNTs, revealing key factors influencing sensor response and demonstrating outstanding sensitivity of nanotubes for detecting gaseous nitrogen dioxide.
Article
Chemistry, Analytical
Antonio Orlando, Asma Mushtaq, Andrea Gaiardo, Matteo Valt, Lia Vanzetti, Martina Aurora Costa Angeli, Enrico Avancini, Bajramshahe Shkodra, Mattia Petrelli, Pietro Tosato, Soufiane Krik, David Novel, Paolo Lugli, Luisa Petti
Summary: Solid-state chemiresistive gas sensors, particularly those based on carbon nanotubes, have received significant research attention due to their high sensitivity, low power consumption, low cost, and portability. This study explores the use of single-walled carbon nanotube (SWCNT)-based sensing films deposited by spray deposition for gas sensor fabrication. Different surfactants were utilized during deposition to investigate their impact on sensor performance. The results showed high selectivity towards ammonia (NH3) and nitrogen dioxide (NO2), with enhanced responses under humid conditions and at elevated temperatures. The best sensing conditions were achieved against NO2, utilizing sensors with 10 layers of deposition and operating at 150 degrees C.
Article
Chemistry, Analytical
Jiaxin Zhou, Yi Xia, Zhirong Zou, Qing Yang, Xue Jiang, Xiaoli Xiong
Summary: This study presents a composite carbon nanomaterial electrode of CDs/MWCNTs, which is synthesized using liquid dielectric barrier discharge (DBD) microplasma. The electrode shows enhanced electron transfer and electrocatalytic activity for sensitive detection of dopamine (DA). The sensor exhibits good sensing performance and successfully detects DA levels in human serum samples with satisfactory selectivity and recovery rate.
ANALYTICA CHIMICA ACTA
(2023)
Article
Engineering, Electrical & Electronic
Eusebiu Ilarian Ionete, Alina Elena Niculescu, Stefan Ionut Spiridon, Bogdan Florian Monea
Summary: Experimental investigation of magnetoresistance behavior of cryogenic temperature sensors based on different chiralities of SWCNTs was conducted, resulting in the derivation of magnetoresistance expression and coefficients based on experimental data, as well as explanation for the electrical resistance dependence on temperature below 80K. The hopping dimension values for systems composed of purified (7,6) chirality SWCNTs and unsorted SWCNTs were found to be 2.67 and 2.97, respectively, in good agreement with theory.
IEEE SENSORS JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Bogumila Kumanek, Karolina Z. Milowska, Lukasz Przypis, Grzegorz Stando, Karolina Matuszek, Douglas MacFarlane, Mike C. Payne, Dawid Janas
Summary: The charge transport properties of single-walled carbon nanotubes (SWCNTs) can be modified by doping with nitrogen compounds, and their impact on the electrical conductivity of SWCNTs can be predicted based on their Hammett's constants and pK(a) values. The doping level can also be tuned by changing the type, concentration, and orientation of the nitrogen compounds.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Biochemistry & Molecular Biology
Shu-Yu Guo, Peng-Xiang Hou, Feng Zhang, Chang Liu, Hui-Ming Cheng
Summary: This review presents the potential of single-wall carbon nanotubes (SWCNTs) as candidate materials for flexible gas sensors. It introduces the sensing mechanism, structure parameters, design, fabrication, and performance of SWCNT-based gas sensors, and discusses the principles and possible approaches to further improve their performance.
Review
Energy & Fuels
Jin-Myung Choi, Jiye Han, Tushar Rane, Soyeon Kim, Ick Soo Kim, Il Jeon
Summary: This review discusses the fundamentals of utilizing SWCNTs in PSCs, including their characteristics as electron-transporting layer, hole-transporting layer, photoactive layer, and interfacial materials. It also presents strategies to improve PSCs performance through defect control and enhancement of electrical and morphological properties.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Xun Gong, Seon-Yeong Kwak, Soo-Yeon Cho, Daniel Lundberg, Albert Tianxiang Liu, Melissa Keiko McGee, Michael S. Strano
Summary: This study presents the synthesis of Pd-conjugated ss(GT)(15)-DNA-wrapped SWCNTs as near-infrared fluorescent sensors for methane detection. The sensors demonstrated the ability to detect methane at low concentrations, and the results advanced the necessary hardware and computational methods for environmental methane sensing.
Article
Chemistry, Physical
Fei-Peng Du, Hui Zhang, Jun-An Yao, Si-Ying Chen, Jin-Kun Xiao, Ping Fu, Yun-Fei Zhang
Summary: In this study, a graphene quantum dots (GQDs) intermediate layer was used to couple poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and single-walled carbon nanotubes (SWCNTs) to enhance the thermoelectric properties. The multilayer films showed improved interfacial adhesion, enhanced electrical conductivity, and reduced thermal conductivity, resulting in an enhanced figure of merit. The strategy employed in this study provides novel insights into high-performance SWCNTs-based thermoelectric materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Nikita Lapekin, Valeriy V. Golovakhin, Ekaterina Yu Kim, Alexander G. Bannov
Summary: This article investigates the impact of chemical treatment on the sensing properties of multi-walled carbon nanotubes at room temperature. The results suggest that chemical treatment greatly enhances the sensors' response to NO2.
Article
Nanoscience & Nanotechnology
Xuan Peng, Jose Manuel Vicent-Luna, Qibing Jin
Summary: The study introduces a new method, reactive separation, utilizing carbon nanotubes to capture CO2. The simulation showed that (11,11) carbon nanotubes have excellent CO2 capture capability in the water-gas shift reaction, indicating a promising strategy for developing novel CO2 capture technologies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Composites
Zhaofeng Wu, Shuai Cao, Qihua Sun, Furu Zhong, Min Zhang, Haiming Duan
Summary: The uniform dispersion of multi-wall carbon nanotubes in waterborne polyurethane matrix was achieved through in-situ polymerization and latex particles assisted dispersion, enhancing the mechanical and gas sensing properties of the composite material. The response of the flexible MWNT/WPU to O3 was 4.1 times that of pure MWNTs, with a detection limit reaching 38.4 ppb, while also exhibiting high bending stability and long-term stability.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Thanattha Chobsilp, Thotsaphon Threrujirapapong, Visittapong Yordsri, Alongkot Treetong, Saowaluk Inpaeng, Karaked Tedsree, Paola Ayala, Thomas Pichler, Lei Shi, Worawut Muangrat
Summary: A highly sensitive and selective formaldehyde sensor was successfully fabricated using hybrid materials of nitrogen-doped double-walled carbon nanotubes (N-DWCNTs) and polyvinylpyrrolidone (PVP). The sensor showed high response to formaldehyde and low response to other gases. The study demonstrated the high performance of PVP/N-DWCNTs hybrid materials in formaldehyde sensing applications.
Article
Chemistry, Multidisciplinary
Min-Ken Li, Adnan Riaz, Martina Wederhake, Karin Fink, Avishek Saha, Simone Dehm, Xiaowei He, Friedrich Schoeppler, Manfred M. Kappes, Han Htoon, Valentin N. Popov, Stephen K. Doom, Tobias Hertel, Frank Hennrich, Ralph Krupke
Summary: This work demonstrates that electroluminescence excitation is selective towards neutral defect-state configurations with the lowest transition energy, which, combined with gate control, leads to high spectral purity.
Article
Materials Science, Multidisciplinary
Karolina Z. Milowska, Maciej Krzywiecki, Mike C. Payne, Dawid Janas
Summary: Carbon nanomaterials such as graphene and carbon nanotubes have attracted significant interest due to their extraordinary properties, with the potential to play a key role in future applications. The sensitivity of carbon nanostructures to chemical stimuli allows for enhanced charge propagation capabilities, as seen in the impact of bromine addition on the electrical and thermoelectric properties of single-walled carbon nanotube films. Experimental results show a two orders of magnitude enhancement in thermoelectric capabilities through sonication-assisted introduction of Br2 into the SWCNT network, with computational analyses revealing the dopant's influence on electronic and charge transport properties.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Youngkyu Hwang, Seonggwang Yoo, Namsoo Lim, Sang Myeong Kang, Hyeryun Yoo, Jongwoo Kim, Yujun Hyun, Gun Young Jung, Heung Cho Ko
Article
Chemistry, Physical
Namsoo Lim, Hyeonghun Kim, Yusin Pak, Young Tae Byun
Summary: This paper demonstrates the enhanced NO2 sensing performance of graphene with defects generated by rapid thermal annealing (RTA). The density of defects proportionally increased with increasing the RTA temperature. However, excessive defects formed at temperatures above 500 degrees Celsius may damage electrical paths and deteriorate NO2 response.
Article
Chemistry, Multidisciplinary
Namsoo Lim, Kyeong Heon Kim, Young Tae Byun
Summary: Highly sensitive and selective chemiresistive-type NO gas detection was demonstrated using defected single-walled carbon nanotubes (SWCNTs) decorated with specific molecules, showing a 3-fold enhancement in NO response compared to non-defected SWCNTs. The recovery performance was significantly improved by 45 times via a simple rinsing process with ethanol. The fabricated device showed high selectivity to NO gas and has potential applications in healthcare fields requiring ppb-level detection.