Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Physical
Yu Cai, Huitao Yu, Can Chen, Yiyu Feng, Mengmeng Qin, Wei Feng
Summary: Vertically aligned carbon nanotube (VACNT) arrays have superior vertical thermal conductivity but suffer from weak interaction between adjacent carbon nanotubes (CNT) during polymer infiltration. This study introduces a novel three-dimensional CNT (3DCNT) network structure, where VACNT is crosslinked by secondary CNT, to provide in-plane phonon paths and maintain structural stability. Results show that the 3DCNT20/P composite has significantly higher vertical and horizontal thermal conductivity compared to the IVACNT/P composite.
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, Physical
Karlheinz Strobl, Fahd Rajab
Summary: Long-lasting, self-supporting, superhydrophobic carbon nanotube structures have been developed for fluid processing devices requiring gas transfer.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Bishwa Chandra Adhikari, Bhotkar Ketan, Ju Sung Kim, Sung Tae Yoo, Eun Ha Choi, Kyu Chang Park
Summary: This study successfully achieved the goal of measuring the spot of high-density electron beams under the variation of voltage and exposure time by fabricating vertically aligned carbon nanotube emitters. By capturing microimages on a microchannel plate and analyzing the morphology structures using scanning electron microscopy, the researchers obtained measurements of the high-density electron beam and demonstrated that this configuration is applicable to high-resolution multi-beam electron microscopy and high-resolution X-ray imaging technology.
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, Physical
Hayley Zhang, Ben Wang, Billyde Brown
Summary: The study demonstrated the successful fabrication of a bimetallic CoFe2O4 nanoparticle - vertically aligned carbon nanotube composite with high electrochemical performance, resulting in significantly increased area-specific energy and power density.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Yangsu Xie, Hamidreza Zobeiri, Liping Xiang, Gyula Eres, Jianmei Wang, Xinwei Wang
Summary: This study discovered abnormal behavior of CNT bundles in heat conduction and found that it was caused by nanostructure separation induced by thermal strain, resulting in two parallel heat conduction paths.
Review
Biotechnology & Applied Microbiology
Wei Chen, Qingteng Lai, Yanke Zhang, Zhengchun Liu
Summary: The infection of Staphylococcus aureus and the spread of drug-resistant bacteria pose a serious global public health threat. Developing a fast, simple, low-cost, specific and sensitive detection method for S. aureus is of great significance. Aptasensors, as alternatives to traditional detection methods, have shown promising applications in S. aureus detection.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Lucas Lum, Zhi Kai Ng, Rong Tao Jiang, Chong Wei Tan, Edwin Hang Tong Teo, Beng Kang Tay
Summary: This article reports the complex electromagnetic properties of vertically aligned carbon nanotube arrays. The VACNT arrays were found to be partially anisotropic and displayed lossy dielectric and diamagnetic behavior. This findings contribute to the design of carbon nanotube applications in high-frequency electronics in the future.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Chemistry, Physical
Xuedian Wei, Miaomiao Zhu, Jialu Li, Liu Liu, Jianyong Yu, Zhaoling Li, Bin Ding
Summary: A research team has developed a flexible sweat biosensor based on a fiber structured sensing interface for uric acid detection. This sensor offers high sensitivity and precise detection of uric acid concentration.
Article
Chemistry, Multidisciplinary
Junga Moon, Huaide Jiang, Eun-Cheol Lee
Summary: The physical modification of carbon-nanotube/polydimethylsiloxane composite electrodes using functionalized multi-walled carbon nanotubes (F-MWCNTs) allowed for sequence-specific DNA sensing through pi-pi interactions, resulting in a significantly lower detection limit and broad linear range compared to chemical processes.
Article
Biophysics
Sura A. Muhsin, Muthana Al-Amidie, Zhenyu Shen, Zahar Mlaji, Jiayu Liu, Amjed Abdullah, Majed El-Dweik, Shuping Zhang, Mahmoud Almasri
Summary: A microfluidic based biosensor was used for rapid and simultaneous detection of Salmonella, Legionella, and Escherichia coli O157:H7 in tap water and wastewater. The biosensor concentrated and detected bacteria at both low and high concentrations. The results showed that the biosensors could detect the three bacterial pathogens simultaneously with a detection limit of 3 bacterial cells/mL in 30-40 minutes.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Biophysics
Li Xue, Ruya Guo, Fengchun Huang, Wuzhen Qi, Yuanjie Liu, Gaozhe Cai, Jianhan Lin
Summary: A biosensor using magnetic nanobead nets and manganese dioxide nanoflowers was developed for rapid and sensitive detection of Salmonella typhimurium, showing high accuracy in pathogenic bacteria screening in food.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Analytical
Lingling Wang, Xiaohui Lin, Ting Liu, Zhaohuan Zhang, Jie Kong, Hai Yu, Juan Yan, Donglei Luan, Yong Zhao, Xiaojun Bian
Summary: A reusable and universal impedimetric sensing platform based on a bacteria-imprinted polythiophene film (BIF) is proposed for the rapid and sensitive detection of pathogenic bacteria. The sensor exhibits excellent selectivity and can be applied in the analysis of real samples.
Review
Materials Science, Multidisciplinary
Hossein Taghinejad, Ali A. Eftekhar, Ali Adibi
OPTICAL MATERIALS EXPRESS
(2019)
Article
Nanoscience & Nanotechnology
Shoufeng Lan, Xueyue Zhang, Mohammad Taghinejad, Sean Rodrigues, Kyu-Tae Lee, Zhaocheng Liu, Wenshan Cai
Article
Chemistry, Multidisciplinary
Mohamad Mohsen Momeni, Mohammad Taghinejad, Yousef Ghayeb, Robabeh Bagheri, Zhenlun Song
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2019)
Article
Nanoscience & Nanotechnology
Mohammad Taghinejad, Wenshan Cai
Article
Nanoscience & Nanotechnology
Kyu-Tae Lee, Mohammad Taghinejad, Jiahao Yan, Andrew S. Kim, Lakshmi Raju, Devin K. Brown, Wenshan Cai
Article
Physics, Multidisciplinary
Mohammad Taghinejad, Zihao Xu, Kyu-Tae Lee, Tianquan Lian, Wenshan Cai
PHYSICAL REVIEW LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Mohammad Taghinejad, Zihao Xu, Hua Wang, Hossein Taghinejad, Kyu-Tae Lee, Sean P. Rodrigues, Ali Adibi, Xiaofeng Qian, Tianquan Lian, Wenshan Cai
Article
Chemistry, Multidisciplinary
Hossein Taghinejad, Mohammad Taghinejad, Ali A. Eftekhar, Zhipeng Li, Matthew P. West, Mohammad H. Javani, Sajjad Abdollahramezani, Xiang Zhang, Mengkun Tian, Thomas Johnson-Averette, Pulickel M. Ajayan, Eric M. Vogel, Su-Fei Shi, Wenshan Cai, Ali Adibi
Article
Chemistry, Multidisciplinary
Sajjad Abdollahramezani, Omid Hemmatyar, Mohammad Taghinejad, Hossein Taghinejad, Yashar Kiarashinejad, Mohammadreza Zandehshahvar, Tianren Fan, Sanchit Deshmukh, Ali A. Eftekhar, Wenshan Cai, Eric Pop, Mostafa A. El-Sayed, Ali Adibi
Summary: This study introduces a reconfigurable hybrid metasurface platform by incorporating the phase-change material Ge2Sb2Te5 (GST) into metal-dielectric meta-atoms for active and nonvolatile tuning of properties of light. The reduced-dimension meta-atom can selectively control the hybrid plasmonic-photonic resonances of the metasurface via the dynamic change of optical constants of GST, demonstrating promising applications in high-contrast optical switching and efficient beam deflection. Findings suggest dynamic hybrid metasurfaces as compelling candidates for next-generation reprogrammable meta-optics.
Article
Optics
Hossein Taghinejad, Sajjad Abdollahramezani, Ali A. Eftekhar, Tianren Fan, Amir H. Hosseinnia, Omid Hemmatyar, Ali Eshaghian Dorche, Alexander Gallmon, Ali Adibi
Summary: The study introduces a method utilizing GST phase-change materials and ITO microheater platform for electrically reconfigurable optical phase shifters. The potential applications of this hybrid GST/ITO platform in nanophotonics are demonstrated, providing new possibilities for miniaturized integrated photonic structures.
Article
Optics
Xinyue Liu, Bijun Mao, Xianguang Yang, Mohammad Taghinejad, Mingcheng Panmai, Sheng Lan, Wenshan Cai, Baojun Li, Jiahao Yan
Summary: The thickness dependency of radiative energy transfer in vertical vdW heterostructures of WS2/hBN/WS2 is studied, and a controllable directivity of excitonic emission is achieved by changing the stacking order. This study provides a foundation for the realization of all vdW nanophotonics.
LASER & PHOTONICS REVIEWS
(2022)
Article
Multidisciplinary Sciences
Sajjad Abdollahramezani, Omid Hemmatyar, Mohammad Taghinejad, Hossein Taghinejad, Alex Krasnok, Ali A. Eftekhar, Christian Teichrib, Sanchit Deshmukh, Mostafa A. El-Sayed, Eric Pop, Matthias Wuttig, Andrea Alu, Wenshan Cai, Ali Adibi
Summary: The authors demonstrate an efficient platform for electrically driven reconfigurable metasurfaces using phase-change materials. This platform allows for non-volatile, reversible, multilevel, and fast optical modulation and wavefront engineering in the near-infrared spectral range. The study represents a critical advance towards the development of fully integrable dynamic metasurfaces and their potential for beamforming applications.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Andrew S. Kim, Mohammad Taghinejad, Anjan Goswami, Lakshmi Raju, Kyu-Tae Lee, Wenshan Cai
Summary: This study investigates the dependence of switching dynamics on optical resonances in plasmonic platforms. All-optical control of resonance bands in a hybrid photonic-plasmonic crystal is utilized to probe the resonance-dependent switching dynamics upon hot carrier formation. Experimental results demonstrate enhanced switching performance near the anti-crossing point, arising from strong coupling between local and nonlocal resonance modes. Additionally, the nonlinear correspondence between optical resonances and refractive index change, combined with hot-carrier dynamics, leads to tailorable dispersion of recovery speeds, deviating from the characteristic lifetime of hot carriers. The comprehensive understanding obtained in this study provides new protocols for optically characterizing hot-carrier dynamics and optimizing resonance-based all-optical switches.