Article
Physics, Multidisciplinary
Zherui Han, Xiaolong Yang, Sean E. Sullivan, Tianli Feng, Li Shi, Wu Li, Xiulin Ruan
Summary: This study considers multiple factors such as phonon anharmonicity, phonon renormalization, and electron-phonon coupling on the Raman peak frequency shift and linewidth in graphene samples. The results show that four-phonon scattering contributes significantly to the linewidth, increasing with temperature, while the temperature dependence of electron-phonon interactions reverses above a certain doping threshold.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Elisha Mercado, Julian Anaya, Martin Kuball
Summary: The presence of polymer transfer residues on graphene surfaces significantly impacts the thermal properties of the material. The proportion of surface covered by residues and the mean separation distance between clusters are key factors in determining the level of thermal conductivity suppression. This study has important implications for large-scale graphene fabrication and transfer, particularly in applications where graphene is used as a heat spreading layer in devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Thermodynamics
Juhang Cha, Hwijong Shin, Ohmyoung Kwon
Summary: Through this study, we achieved a two-dimensional extension of NP SThM with almost a 20-fold improvement in measurement sensitivity under mild vacuum conditions. Vacuum point scanning thermal microscopy has been proven to be an essential tool in the analysis of nanoscale energy transport and conversion inside nanodevices and nanomaterials.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Lin Yang, Yi Tao, Yanglin Zhu, Manira Akter, Ke Wang, Zhiliang Pan, Yang Zhao, Qian Zhang, Ya-Qiong Xu, Renkun Chen, Terry T. Xu, Yunfei Chen, Zhiqiang Mao, Deyu Li
Summary: This study observed length-dependent thermal conductivity in ultrathin van der Waals crystal NbSe3 nanowires, providing experimental evidence for superdiffusive phonon transport. Contrary to the classical size effect due to phonon-boundary scattering, the observed thermal conductivity showed an enhancement as the characteristic size of the nanowires decreased.
NATURE NANOTECHNOLOGY
(2021)
Article
Thermodynamics
Yifan Li, Tong Zhang, Yuan Zhang, Chenggong Zhao, Niming Zheng, Wei Yu
Summary: This study investigates the effect of graphene oxide nanosheet size on its thermal conductivity and finds that larger-sized nanosheets have higher thermal conductivity values. Additionally, the study confirms the inheritability of this size dependence in practical applications.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Multidisciplinary
Jose M. Sojo-Gordillo, Gerard Gadea-Diez, David Renahy, Marc Salleras, Carolina Duque-Sierra, Pascal Vincent, Luis Fonseca, Pierre-Olivier Chapuis, Alex Morata, Severine Gomes, Albert Tarancon
Summary: A combined scanning thermal microscope and scanning electron microscope was used to characterize a suspended silicon nanowire. The thermal and mechanical properties were measured simultaneously, and the effects of the rough surface on heat dissipation and stiffness were studied.
Article
Nanoscience & Nanotechnology
Shao-Nan Chen, Xu-Shan Liu, Rong-Hui Luo, En-Ze Xu, Jian-Guo Tian, Zhi-Bo Liu
Summary: This study demonstrates a large enhancement in the thermal conductivity of a van der Waals heterostructure composed of few-layer hexagonal boron nitride (h-BN) and reduced graphene oxide (RGO). By controlling the reduction temperature of RGO and changing the thickness of h-BN, the thermal conductivity of RGO is increased by nearly 18 times.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Weizhun Jin, Linhua Jiang, Lin Han, Haimeng Huang, Jianfeng Zhang, Mingzhi Guo, Yue Gu, Fangfang Zhi, Zhiyou Chen, Guohui Yang
Summary: New nanofluids based on graphene and GR/MXene were prepared to enhance thermal conductivity. The addition of MXene improved the dispersion stability of GR nanofluids and maintained high thermal conductivity while reducing viscosity.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Nanoscience & Nanotechnology
Anis Chiout, Cleophanie Brochard-Richard, Laetitia Marty, Nedjma Bendiab, Meng-Qiang Zhao, A. T. Charlie Johnson, Fabrice Oehler, Abdelkarim Ouerghi, Julien Chaste
Summary: A study has found that the frequency of nanomechanical resonators can be effectively tuned at the nanoscale using a suspended MoS2 membrane heated by the Joule effect, with a significantly larger modulation amplitude compared to other approaches. This research is crucial for fully harnessing the potential of two-dimensional materials.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Engineering, Multidisciplinary
Tiantian Yang, Zeyi Jiang, Heming Han, Xinzhi Cai, Yuqiao Liu, Xinru Zhang, Xinxin Zhang, Yujie Ren, Jian Hu
Summary: In this study, high thermal conductive PVDF composites were fabricated using graphene foam and dopamine modified graphene nanoplatelets. The results showed that welding mGNPs onto GF improved the composite's TC by forming efficient thermal conductive pathways. The obtained composites exhibited excellent in-plane TC, dimensional stability, and mechanical property.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Michelle E. Chen, Miguel Munoz Rojo, Feifei Lian, Justin Koeln, Aditya Sood, Stephanie M. Bohaichuk, Christopher M. Neumann, Sarah G. Garrow, Kenneth E. Goodson, Andrew G. Alleyne, Eric Pop
Summary: Graphene-based thermal switches offer a new opportunity for active control of fast thermal transients, with low operating voltage and high thermal switching ratio. A compact thermal model is developed for double-clamped suspended membrane thermal switches, showcasing the thermal trade-offs between temperature swing and average temperature.
Article
Multidisciplinary Sciences
Ruishi Qi, Ruochen Shi, Yuehui Li, Yuanwei Sun, Mei Wu, Ning Li, Jinlong Du, Kaihui Liu, Chunlin Chen, Ji Chen, Feng Wang, Dapeng Yu, En-Ge Wang, Peng Gao
Summary: Four-dimensional electron energy-loss spectroscopy measurements reveal localized modes at heterointerfaces that impact thermal conductance and electron mobility. Experimental challenges stem from the need to achieve combined spatial, momentum, and spectral resolutions to probe these modes effectively.
Article
Materials Science, Multidisciplinary
X. Yang, A. Jena, F. Meng, S. Wen, J. Ma, X. Li, W. Li
Summary: In this study, the effect of electron-phonon interaction on the lattice thermal conductivity of graphene was investigated using first-principles calculations. It was found that the indirect coupling between flexural acoustic phonons and electrons has a significant impact on thermal conductivity in graphene, particularly due to the dominance of normal processes. Additionally, an unusual minimum thermal conductivity was observed at a specific charge carrier density in graphene.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Composites
Yingchun Liu, Maoping Lu, Kun Wu, Enxiang Jiao, Liyan Liang, Jun Shi, Mangeng Lu
Summary: By preparing high thermally conductive PDMS composites containing undamaged covalent-functionalized graphene nanoflakes, the contact resistance between interfaces was effectively reduced, resulting in an enhanced thermal conductivity and preserved superior mechanical properties. Furthermore, exploring a new synergistic mechanism further improved the heat dissipation performance of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
R. Dinesh, P. Karuppasamy, S. Kalaiselvam
Summary: This study investigates the influence of nano additives on the thermal and rheological behavior of lubricants, finding that nano lubricants have the ability to enhance thermal conductivity and dynamic viscosity, while exhibiting non-Newtonian shear thinning behavior.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Physics, Applied
Euihan Jung, Gwangseok Hwang, Jaehun Chung, Ohmyoung Kwon, Jaecheon Han, Yong-Tae Moon, Tae-Yeon Seong
APPLIED PHYSICS LETTERS
(2015)
Article
Chemistry, Multidisciplinary
Jaehun Chung, Gwangseok Hwang, Hyeongkeun Kim, Wooseok Yang, Ohmyoung Kwon
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2015)
Article
Physics, Applied
Kyungbae Park, Gwangseok Hwang, Hayeong Kim, Jungwon Kim, Woochul Kim, Sungjin Kim, Ohmyoung Kwon
APPLIED PHYSICS LETTERS
(2016)
Article
Physics, Applied
Taewoong Kim, Tae-Yeon Seong, Ohmyoung Kwon
APPLIED PHYSICS LETTERS
(2016)
Article
Thermodynamics
Gwangseok Hwang, Ohmyoung Kwon
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2016)
Article
Microscopy
Heebum Chae, Gwangseok Hwang, Ohmyong Kwon
Article
Chemistry, Physical
Yoo Jang Song, R. Lydia, Chan-Chieh Lin, Jong-Soo Rhyee, J. Chung, Ohmyoung Kwon, Su Dong Park, Bong Seo Kim
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Chemistry, Multidisciplinary
Woomin Lee, Kenneth David Kihm, Hong Goo Kim, Seungha Shin, Changhyuk Lee, Jae Sung Park, Sosan Cheon, Oh Myoung Kwon, Gyumin Lim, Woorim Lee
Article
Chemistry, Physical
Kichul Yoon, Gwangseok Hwang, Jaehun Chung, Hong Goo Kim, Ohmyoung Kwon, Kenneth David Kihm, Joon Sik Lee
Article
Thermodynamics
J. Chung, K. Kim, G. Hwang, O. Kwon, Y. K. Choi, J. S. Lee
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2012)
Article
Instruments & Instrumentation
Gwangseok Hwang, Jaehun Chung, Ohmyoung Kwon
REVIEW OF SCIENTIFIC INSTRUMENTS
(2014)
Article
Thermodynamics
Ohmyoung Kwon, Geoff Wehmeyer, Chris Dames
NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING
(2019)
Article
Thermodynamics
Ohmyoung Kwon, Geoff Wehmeyer, Chris Dames
NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING
(2019)
Article
Thermodynamics
Juhang Cha, Hwijong Shin, Ohmyoung Kwon
Summary: Through this study, we achieved a two-dimensional extension of NP SThM with almost a 20-fold improvement in measurement sensitivity under mild vacuum conditions. Vacuum point scanning thermal microscopy has been proven to be an essential tool in the analysis of nanoscale energy transport and conversion inside nanodevices and nanomaterials.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Laetitia Bardet, Herve Roussel, Stefano Saroglia, Masoud Akbari, David Munoz-Rojas, Carmen Jimenez, Aurore Denneulin, Daniel Bellet
Summary: The thermal instability of silver nanowires leads to increased electrical resistance in AgNW networks. Understanding the relationship between structural and electrical properties of AgNW networks is crucial for their integration as transparent electrodes in flexible optoelectronics. In situ X-ray diffraction measurements were used to study the crystallographic evolution of Ag-specific Bragg peaks during thermal ramping, revealing differences in thermal and structural transitions between bare and SnO2-coated AgNW networks.
Article
Chemistry, Multidisciplinary
Nathalia Cancino-Fuentes, Arnau Manasanch, Joana Covelo, Alex Suarez-Perez, Enrique Fernandez, Stratis Matsoukis, Christoph Guger, Xavi Illa, Anton Guimera-Brunet, Maria V. Sanchez-Vives
Summary: This study provides a comprehensive characterization of graphene-based solution-gated field-effect transistors (gSGFETs) for brain recordings, highlighting their potential clinical applications.
Article
Chemistry, Multidisciplinary
Sikandar Aftab, Hailiang Liu, Dhanasekaran Vikraman, Sajjad Hussain, Jungwon Kang, Abdullah A. Al-Kahtani
Summary: This study examines the effects of hybrid nanoparticles made of NiO@rGO and NiO@CNT on the active layers of polymer solar cells and X-ray photodetectors. The findings show that these hybrid nanoparticles can enhance the charge carrier capacities and exciton dissociation properties of the active layers. Among the tested configurations, the NiO@CNT device demonstrates superior performance in converting sunlight into electricity, and achieves the best sensitivity for X-ray detection.
Article
Chemistry, Multidisciplinary
Hyo Jung Shin, Seung Gyu Choi, Fengrui Qu, Min-Hee Yi, Choong-Hyun Lee, Sang Ryong Kim, Hyeong-Geug Kim, Jaewon Beom, Yoonyoung Yi, Do Kyung Kim, Eun-Hye Joe, Hee-Jung Song, Yonghyun Kim, Dong Woon Kim
Summary: This study investigates the role of SOX9 in reactive astrocytes following ischemic brain damage using a PLGA nanoparticle plasmid delivery system. The results demonstrate that PLGA nanoparticles can reduce ischemia-induced neurological deficits and infarct volume, providing a potential opportunity for stroke treatment.
Article
Chemistry, Multidisciplinary
Anurag Chaudhury, Koushik Debnath, Nikhil R. Jana, Jaydeep K. Basu
Summary: The study investigates the interaction between nanoparticles and cell membranes, and identifies key parameters, including charge, crowding, and membrane fluidity, that determine the adsorbed concentration and unbinding transition of nanoparticles.
Article
Chemistry, Multidisciplinary
Sina Sadeghi, Fazel Bateni, Taekhoon Kim, Dae Yong Son, Jeffrey A. Bennett, Negin Orouji, Venkat S. Punati, Christine Stark, Teagan D. Cerra, Rami Awad, Fernando Delgado-Licona, Jinge Xu, Nikolai Mukhin, Hannah Dickerson, Kristofer G. Reyes, Milad Abolhasani
Summary: In this study, an autonomous approach for the development of lead-free metal halide perovskite nanocrystals is presented, which integrates a modular microfluidic platform with machine learning-assisted synthesis modeling. This approach enables rapid and optimized synthesis of copper-based lead-free nanocrystals.
Article
Chemistry, Multidisciplinary
Zahir Abbas, Nissar Hussain, Surender Kumar, Shaikh M. Mobin
Summary: The rational construction of free-standing and flexible electrodes for electrochemical energy storage devices is an emerging research focus. In this study, a redox-active metal-organic framework (MOF) was prepared on carbon nanofibers using an in situ approach, resulting in a flexible electrode with high redox-active behavior and unique properties such as high flexibility and lightweight. The prepared electrode showed excellent cyclic retention and rate capability in supercapacitor applications. Additionally, it could be used as a freestanding electrode in flexible devices at different bending angles.
Article
Chemistry, Multidisciplinary
Lishan Zhang, Xiaoting Zhang, Hui Ran, Ze Chen, Yicheng Ye, Jiamiao Jiang, Ziwei Hu, Miral Azechi, Fei Peng, Hao Tian, Zhili Xu, Yingfeng Tu
Summary: Photodynamic therapy (PDT) is a promising local treatment modality in cancer therapy, but its therapeutic efficacy is restricted by ineffective delivery of photosensitizers and tumor hypoxia. In this study, a phototactic Chlorella-based near-infrared (NIR) driven green affording-oxygen microrobot system was developed for enhanced PDT. The system exhibited desirable phototaxis and continuous oxygen generation, leading to the inhibition of tumor growth in mice. This study demonstrates the potential of using a light-driven green affording-oxygen microrobot to enhance photodynamic therapy.
Article
Chemistry, Multidisciplinary
Yujin Li, Jing Xu, Xinqi Luo, Futing Wang, Zhong Dong, Ke-Jing Huang, Chengjie Hu, Mengyi Hou, Ren Cai
Summary: In this study, hollow heterostructured materials were constructed using an innovative template-engaged method as cathodes for zinc-ion batteries. The materials exhibited fast Zn2+ transport channels, improved electrical conductivity, and controlled volume expansion during cycling. The designed structure allowed for an admirable reversible capacity and high coulombic efficiency.
Article
Chemistry, Multidisciplinary
Paritosh Mahato, Shashi Shekhar, Rahul Yadav, Saptarshi Mukherjee
Summary: This study comprehensively elucidates the role of the core and electrostatic surface of metal nanoclusters in catalytic reduction reactions. The electrostatic surface dramatically modulates the reactivity of metal nanoclusters.
Article
Chemistry, Multidisciplinary
Pei Liu, Mengdi Liang, Zhengwei Liu, Haiyu Long, Han Cheng, Jiahe Su, Zhongbiao Tan, Xuewen He, Min Sun, Xiangqian Li, Shuai He
Summary: This study demonstrates a simple and environmentally-friendly method for the synthesis of zinc oxide nanozymes (ZnO NZs) using wasted hop extract (WHE). The WHE-ZnO NZs exhibit exceptional peroxidase-like activity and serve as effective catalysts for the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). In addition, a straightforward colorimetric technique for detecting both H2O2 and glucose was developed using the WHE-ZnO NZs as peroxidase-like catalysts.
Article
Chemistry, Multidisciplinary
Hyunkyu Oh, Young Jun Lee, Eun Ji Kim, Jinseok Park, Hee-Eun Kim, Hyunsoo Lee, Hyunjoo Lee, Bumjoon J. Kim
Summary: Mesoporous carbon particles have unique structural properties that make them suitable as support materials for catalytic applications. This study investigates the impact of channel nanostructures on the catalytic activity of porous carbon particles (PCPs) by fabricating PCPs with controlled channel exposure on the carbon surface. The results show that PCPs with highly open channel nanostructures exhibit significantly higher catalytic activity compared to those with closed channel nanostructures.
Article
Chemistry, Multidisciplinary
Yunjie Lu, Zhaohui Li, Zewei Li, Shihao Zhou, Ning Zhang, Jianming Zhang, Lu Zong
Summary: A tough, long-lasting adhesive and highly conductive nanocomposite hydrogel (PACPH) was fabricated via the synergy of interfacial entanglement and adhesion group densification. PACPH possesses excellent mechanical properties, interfacial adhesion strength, and conductivity, making it a promising material for long-term monitoring of human activities and electrocardiogram signals.
Article
Chemistry, Multidisciplinary
Zichao Wei, Audrey Vandergriff, Chung-Hao Liu, Maham Liaqat, Mu-Ping Nieh, Yu Lei, Jie He
Summary: We have developed a simple method to prepare polymer-grafted plasmonic metal nanoparticles with pH-responsive surface-enhanced Raman scattering. By using pH-responsive polymers as ligands, the aggregation of nanoparticles can be controlled, leading to enhanced SERS. The pH-responsive polymer-grafted nanoparticles show high reproducibility and sensitivity in solution, providing a novel approach for SERS without the need for sample pre-concentration.
Article
Chemistry, Multidisciplinary
Melis Ozge Alas Colak, Ahmet Gungor, Merve Buldu Akturk, Emre Erdem, Rukan Genc
Summary: This research investigates the effect of functionalizing carbon dots with hydroxyl polymers on their performance as electrode materials in a supercapacitor. The results show that the functionalized carbon dots exhibit excellent electrochemical performance and improved stability.