Article
Chemistry, Multidisciplinary
Dayan Liu, Kai Xiang, Shuchen Zhang, Ying Wang, Hongjie Zhang, Taibin Wang, Feng Yang, Ran Du, Jinjie Qian, Zhi Yang, Yue Hu, Shaoming Huang
Summary: This study reports the co-realization of high density and chirality controlling of single-walled carbon nanotubes (SWNTs) in a low-temperature growth process using a developed solid Trojan catalyst. The high temperature Trojan catalyst formation process provides sufficient catalyst number for high density. The liquid Trojan catalysts are cooled to solid state at a low growth temperature (540 degrees C), acting as a good template for chirality controlling of SWNTs with the six-fold symmetry face (111). A horizontal array of (9, 6) and (13, 1) SWNTs with a density of 4 tubes μm(-1) and approximately 90% purity is achieved. The comparison between the initial catalyst distribution and the density of as-grown tubes indicates no sacrificing of catalysts number to improve chirality selectivity. This work opens up new possibilities for catalyst design and chirality control in SWNTs growth.
Article
Nanoscience & Nanotechnology
Sophia Zanoni, Brennan P. Watts, Kevin Tvrdy
Summary: Despite the commercial availability of many different hydrogel formulations, the effective gel-based purification of single-walled carbon nanotubes (SWNT) remains exclusive to Sephacryl S-200. In this study, various commercially available gels and custom-synthesized gels were investigated for their ability to purify SWNT, with findings showing that different gels exhibit unique SWNT chiral selectivity and physiochemical properties. Superose 6 was found to adsorb more SWNT than Sephacryl S-200 and exhibit a unique preference for specific SWNT chiralities, providing insights into the rational design of gels for SWNT purification.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Marianna Kharlamova, Christian Kramberger
Summary: The growth dynamics and mechanism of different-chirality inner tubes of carbon nanotubes were studied using in situ annealing and Raman spectroscopy measurements. It was found that the growth process consists of two successive stages and the activation energies vary with tube diameter and metal type.
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
Boda Yu, Sadahito Naka, Haruka Aoki, Koichiro Kato, Daiki Yamashita, Shun Fujii, Yuichiro K. Kato, Tsuyohiko Fujigaya, Tomohiro Shiraki
Summary: Defect functionalization of SWCNTs through chemical modification is a promising strategy for generating near-infrared photoluminescence. In this study, aryldiazonium reagents with pi-conjugated ortho-substituents were used to selectively emit single defect photoluminescence in a specific wavelength range.
Article
Chemistry, Multidisciplinary
Piao Xie, Yun Sun, Chao Chen, Shu-Yu Guo, Yiming Zhao, Xinyu Jiao, Peng-Xiang Hou, Chang Liu, Hui-Ming Cheng
Summary: This study selectively separated semiconducting single-walled carbon nanotubes (s-SWCNTs) with large diameters using SWCNTs with large diameters as raw materials and a conjugated polymer with long side chains as wrapping agent. The study successfully enriched s-SWCNTs with a diameter of approximately 1.9 nm, which exhibited a clean surface. Thin-film transistors constructed with the sorted s-SWCNTs as channel material showed charge-carrier mobilities higher than 10 cm(2) V-1 s(-1) and on/off ratios higher than 10(3).
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)
Article
Chemistry, Multidisciplinary
Verena Wulf, Gadi Slor, Parul Rathee, Roey J. Amir, Gili Bisker
Summary: The study presents amphiphilic polymer-dendron hybrids composed of hydrophobic dendrons and hydrophilic polyethylene glycol for suspending SWCNTs and monitoring enzymatic activity through changes in the SWCNT fluorescent signal. This research provides a rational design approach for functional SWCNTs that can be used for optical sensing of enzymatic activity in the near-infrared spectral range.
Article
Engineering, Environmental
Shulan Hao, Liu Qian, Qianru Wu, Dong Li, Fangqian Han, Lihu Feng, Liantao Xin, Tao Yang, Shiying Wang, Jin Zhang, Maoshuai He
Summary: This study successfully synthesized high-quality single-walled carbon nanotubes (SWNTs) on layered double hydroxides (LDHs) containing Fe and FeCo using CO chemical vapor deposition (CVD). The effects of temperature and catalyst composition on the diameter and chirality distributions of SWNTs were investigated. It was found that subnanometer SWNTs were produced by both catalysts at low temperatures. The (6, 5) SWNTs were synthesized from LDHs containing bimetallic FeCo at 600 degrees C, and the chirality distribution was further narrowed by a two-phase extraction method.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Spectroscopy
Yang Xu, Mengke Zou, Hong Wang, Lili Zhang, Mingming Xing, Maoshuai He, Hua Jiang, Qiang Zhang, Fangyun Xin, Ying Tian
Summary: In this study, we successfully fabricated nanocomposites of NaYF4:Yb3+, Tm3+@NaYF4:Yb3+@SiO2-SWCNTs, which can serve as real-time temperature-feedback moiety and efficient nano-heaters. The nanocomposites display excellent photothermal conversion capacity, showing an increase in temperature from 23.3°C to 60.1°C under 980nm excitation. The temperature of the nanocomposites can be monitored in real time based on the fluorescent intensity ratio of UCNPs. In vitro experiments demonstrate that the nanocomposites can reach the PTT temperature of 42.2°C at a tissue injection of 1 mm under moderate laser power (980 nm, 2.0 W cm-2).
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
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
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, 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
Chemistry, Multidisciplinary
Yue Yu, Yifan Zhao, Shouheng Li, Chao Zhao, Weiming Liu, Shanshan Wang, Feng Ding, Jin Zhang
Summary: Developing a convenient method to determine the complete structure of single-walled carbon nanotubes (SWNTs) is important for achieving controlled growth of this nanomaterial. This study presents a simple strategy to discriminate chirality and characterize the handedness-selective growth of nanomaterials. By constructing artificially aligned SWNTs/graphene (Gr) vertical heterostructures, the 3D handedness information of SWNTs is transformed to projected 2D space using transmission electron microscopy. The work also explores the interfacial alignment between SWNTs and Gr and its effects on the electronic structures.
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
Acoustics
Ekaterina Kholkina, Narendra Kumar, Kari Eranen, Markus Peurla, Heikki Palonen, Jarno Salonen, Juha Lehtonen, Dmitry Yu Murzin
Summary: The study focused on waste minimization strategy in synthesis of catalysts from desulfurization slag, resulting in highly crystalline catalysts with improved catalytic activity. Ultrasonication as an additional synthesis step enhanced the crystallization of new phases, leading to increased catalytic performance in basic reactions. Different treating agents and ultrasound pretreatment played important roles in achieving high selectivity and activity for desired product.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Georg Daniel Forster, Thomas D. Swinburne, Hua Jiang, Esko Kauppinen, Christophe Bichara
Summary: The study established a model for predicting the growth rates of carbon nanotubes, revealing the interaction between external experimental conditions and interface energies. The distribution of growth rates dependent on chiral angle shows non-monotonic trends with changing interface energies.
Article
Energy & Fuels
Elmeri Pienihakkinen, Christian Lindfors, Taina Ohra-aho, Juha Lehtonen, Tom Granstrom, Minna Yamamoto, Anja Oasmaa
Summary: This study investigated fast pyrolysis of hydrolysis lignin in fluidized bed units, identifying technical challenges related to lignin degradation rates, secondary reactions in the vapor phase, pressure buildup, and deposit formation. The carbohydrate content of hydrolysis lignin was found to impact processability, with lower carbohydrate content leading to more challenges such as clogging and bed agglomeration. Solutions such as adding a rotating mixer or feeding raw material in different sections of the reactor were proposed to overcome these challenges.
Article
Engineering, Electrical & Electronic
Zheyuan Zhang, Xiangnan Sun, Pengtao Yuan, Shoko Yokokawa, Yongjia Zheng, Hongbo Jiang, Lei Jin, Anton Anisimov, Esko Kauppinen, Rong Xiang, Shigeo Maruyama, Shinji Yamashita, Sze Y. Set
Summary: SWCNT@BNNT exhibits enhanced optical power tolerance and longer lifetime compared to pristine SWCNT, making it a promising candidate for high-power intensity applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Er-Xiong Ding, Peng Liu, Abu Taher Khan, Qiang Zhang, Nan Wei, Hua Jiang, Esko Kauppinen
Summary: In this study, high-purity, long, and isolated s-SWCNTs were continuously produced by gas-phase synthesis, maintaining their pristine morphologies. The as-produced s-SWCNTs had a purity of 98% and a mean length of 15.2 mm. The enrichment of s-SWCNTs was found to be mainly caused by overpressure in the reactor and methanol, and the s-SWCNTs exhibited a higher negative charge and a critical role of oxygen-contained species in their synthesis. The field-effect transistors based on s-SWCNTs showed a high mean charge carrier mobility, which was 2.27 times higher than that of transistors fabricated with dispersion-processed SWCNTs. The challenges of synthesis repeatability were discussed, and recommendations for improving reproducibility were provided. This study is an important step towards the scalable production of clean, long, and isolated s-SWCNTs with high purity and narrow bandgap distribution.
Article
Multidisciplinary Sciences
I Todoshchenko, M. Kamada, J-P Kaikkonen, Y. Liao, A. Savin, M. Will, E. Sergeicheva, T. S. Abhilash, E. Kauppinen, P. J. Hakonen
Summary: Low dimensional fermionic quantum systems have attracted great interest due to their unique physical phenomena. We have successfully confined He-3 on a carbon nanotube to form a 2-dimensional Fermi system and observed a quantum phase transition from 1/3 solid to an unknown, soft, and mobile solid phase.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Er-Xiong Ding, Peng Liu, Hoon Hahn Yoon, Faisal Ahmed, Mingde Du, Abde Mayeen Shafi, Naveed Mehmood, Esko I. Kauppinen, Zhipei Sun, Harri Lipsanen
Summary: Fabricating electronic and optoelectronic devices using a facile electrode fabrication process with SWCNT films leads to improved device performance. Dry-transferred SWCNT films as transparent electrodes in Schottky diodes for photodetector applications increase light absorption in photoactive MoS2 channels. The enhanced photodetection is attributed to FN tunneling and internal photoemission of charge carriers excited from indium tin oxide across the MoS2 layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Energy & Fuels
Christian Lindfors, Douglas C. Elliott, Wolter Prins, Anja Oasmaa, Juha Lehtonen
Article
Biochemistry & Molecular Biology
Dong Li, Liantao Xin, Bocheng Yang, Zizheng Chen, Qianru Wu, Fangqian Han, Shulan Hao, Lihu Feng, Xiaoyu Wang, Shiying Wang, Lei Wang, Maoshuai He
Summary: A new method for preparing homogeneous dispersions of SWNTs in water is proposed, which involves dialysis in deionized water and polyvinylpyrrolidone wrapping without the use of sonication. The resulting SWNT aerogels exhibit high capacities for absorbing organic solvents, providing a possible way to harness the exceptional properties of SWNTs.
Article
Chemistry, Physical
Feng Zhang, Lili Zhang, Hua Jiang, Xin Li, Fengning Liu, Zhong-Hai Ji, Peng-Xiang Hou, Shuyu Guo, Hui-Ming Cheng, Esko I. Kauppinen, Chang Liu, Feng Ding
Summary: Structurally uniform single-wall carbon nanotubes (SWCNTs) with a narrow diameter distribution (1.35 +/- 0.25 nm) were successfully synthesized using a CoRu catalyst. By optimizing the catalyst composition and growth conditions, high-efficiency and structure-controlled growth of SWCNTs were achieved.
Article
Engineering, Chemical
Matias Alvear, Federica Orabona, Kari Eranen, Juha Lehtonen, Sari Rautiainen, Martino Di Serio, Vincenzo Russo, Tapio Salmi
Summary: The direct epoxidation of light olefin mixtures with hydrogen peroxide and titanium silicalite (TS-1) catalyst has both scientific and practical significance, as it offers potential economic and environmental advantages.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Xiaofan Qin, Dong Li, Lihu Feng, Ying Wang, Lili Zhang, Liu Qian, Wenyue Zhao, Ningning Xu, Xinyan Chi, Shiying Wang, Maoshuai He
Summary: The activation mechanisms of non-magnetic metal palladium (Pd) particles supported by the magnesia carrier for the growth of single-walled carbon nanotubes (SWNTs) are evaluated through theoretical simulations in this study. Experimental results using a porous magnesia supported Pd catalyst confirm the theoretical findings and provide insights into the chirality distribution of the synthesized SWNTs. This work expands the use of non-magnetic metal catalysts for bulk synthesis of SWNTs and contributes to the understanding of catalyst activation mechanisms.
Article
Chemistry, Physical
Matias Alvear, Michele Fortunato, Kari Eraenen, Juha Lehtonen, Sari Rautiainen, Martino Di Serio, Vincenzo Russo, Tapio Salmi
Summary: This study investigated the direct epoxidation of mixed ethene and propene feedstocks using hydrogen peroxide, with the goal of streamlining the process and enhancing efficiency. The study found a reduction in epoxide selectivity and identified methoxy species as the main by-products. Water had a negligible effect on this ring-opening reaction. The tunability of the system was demonstrated, highlighting low temperature and elevated partial ethene pressure as key factors for increasing epoxide selectivity.
Article
Chemistry, Physical
Niko Heikkinen, Juha Lehtonen, Laura Keskivali, Jihong Yim, Shwetha Shetty, Yanling Ge, Matti Reinikainen, Matti Putkonen
Summary: A protective overcoating was deposited on a Fischer-Tropsch catalyst using atomic layer deposition, and a model was used to predict the thickness and penetration depth of the overcoating, which was validated by microscopy studies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Alexander A. Tonkikh, Valentina A. Eremina, Ekaterina A. Obraztsova, Dmitry A. Musatov, Alexander Yu Pereyaslavtsev, Esko Kauppinen, Elena D. Obraztsova
Summary: The efficient method presented allows for tuning the optical and electrophysical parameters of macroscopic objects made from SWCNTs by filling the inner channels with acceptors and donors in gaseous conditions. This tuning method enables predictable shifts in Fermi level position and optical band gap edge value, with potential applications in various fields such as electrochemical, sensor, solar cell, or thermoelectric electrode materials.
ACS APPLIED NANO MATERIALS
(2021)
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.
