Article
Chemistry, Multidisciplinary
Thomas Cossuet, Laetitia Rapenne, Gilles Renou, Estelle Appert, Vincent Consonni
Summary: An original fabrication process was reported to form open-ended TiO2 nanotubes using ZnO nanowires as positive templates. The differential crystallization process resulted in hexagonal-shaped TiO2 nanotubes with high crystalline quality. This approach allows for the integration of high-quality, open-ended TiO2 nanotubes with tunable length and wall thickness on a wide range of substrates.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Engineering, Environmental
Karuppusamy Indira, Arivalagan Pugazhendhi, M. Rajasekar, Nallaiyan Rajendran, Arunachalam Chinnathambi, Sulaiman Ali Alharbi, Nguyen Chi Thanh, Kathirvel Brindhadevi
Summary: Niobium ions were successfully incorporated into highly ordered TiO2 nanotube arrays for the first time, showing improved charge separation efficiency and potential as a promising photocatalyst for the degradation of organic pollutants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Ying Tao, Zhong Ma, Wenchao Wang, Chi Zhang, Lanlan Fu, Qiong Zhu, Yanliu Li, Guisheng Li, Dieqing Zhang
Summary: A new semiconductor/cocatalyst, Ni2P sensitized TiO2 nanotube arrays photoanode (Ni2P/TiO2-NTAs), is developed for photoelectrocatalytic urea oxidation reaction (PEC-UOR) with high efficiency. The 1D TiO2-NTAs structure accelerates urea molecules diffusion and promotes CO2 gas release at the electrode interface. Meanwhile, Ni2P is also beneficial to urea molecule absorption and CO2 desorption and enables to lower the energy barrier for amine (N-H) dehydrogenation. Furthermore, the robust interfacial charge transfer pathway between Ni2P and TiO2 interface promotes the separation of photogenerated electrons and holes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Ralf H. J. M. Kurvers, Andrea Giovanni Nuzzolese, Alessandro Russo, Gioele Barabucci, Stefan M. Herzog, Vito Trianni
Summary: Collective intelligence is a powerful mechanism that enhances decision accuracy. However, its application has been limited to simple decision tasks, and there is a lack of application in more complex tasks such as medical diagnostics. This study proposes a fully automated approach that utilizes semantic knowledge graphs, natural language processing, and medical ontology to overcome challenges in medical diagnostics and improve accuracy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Xiaoliu Wang, Jianling Zhao, Ziqing Li, Zekun Yin, Zhigang Wu, Xixin Wang
Summary: The study focused on the ternary composite electrode of Fe(OH)(3)/Ag/TNTA, exploring the effects of processing temperatures and deposition amounts of Ag and Fe(OH)(3) on electrode performance. It was found that Ag modification improved the performance of the composite electrode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Computer Science, Information Systems
Zahra Karami Horastani, Fatemeh Karami Horestani, Saber Jamali Hajiani, Rosa Safaiee, Seyed Javad Hashemifar
Summary: The study explores the adsorption of methane on singly and doubly-decorated carbon nanotubes using dispersion-corrected density functional theory. Results show that double decoration significantly enhances methane adsorption, while single decoration leads to weak physical bonding. Methane adsorption decreases the bandgap and results in charge transfer in the doubly decorated carbon nanotubes, increasing conductivity and underlining the importance of ambient oxygen in CNT-based gas sensors' performance.
Article
Engineering, Chemical
Chaorui Xue, Ruizhi Xue, Ruirui Huang, Xiangqian Fan, Huinian Zhang, Wenjing Zheng, Ying Li, Ning Li, Qing Chang, Shengliang Hu
Summary: The performance of interfacial solar-driven water evaporation (ISDWE) technology was enhanced by anodized TiO2 nanotube film and applied voltage on Ti mesh. The water evaporation rate increased from 1.20 kg·m- 2·h-1 to 2.48 kg·m- 2·h-1. The hydrophilic and nanoporous nature of TiO2 nanotube film improved the solar absorptivity and wettability of Ti mesh, thereby reducing the water evaporation enthalpy and achieving a water evaporation rate of 1.98 kg·m- 2·h-1. The applied voltage also enhanced the salt-resistance property of Ti mesh coated with TiO2 nanotube film.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Yen -Ping Peng, En-Xian Zhang, Chia -Hung Chen, Wu -Xing Chen
Summary: In this study, iron was deposited onto titanium dioxide nanotube arrays (TNAs) using the impregnation method to enhance its photocatalytic ability. The results showed that the iron modification successfully attached iron nanoparticles evenly to the TNAs, resulting in improved degradation of trichloroethylene (TCE) in a photoelectrochemical (PEC) system. The Fe-TNAs exhibited red-shifted absorption wavelength and reduced recombination of photo-generated electron-hole pairs, leading to enhanced TCE degradation.
Article
Mathematics, Applied
Kulmani Mehar, Pradeep Kumar Mishra, Subrata Kumar Panda
Summary: The eigenvalue buckling responses of smart carbon nanotube-reinforced hybrid composite shell structure are analyzed under uniform thermal loading using a multiscale material model. The study introduces material nonlinearity due to shape memory alloy fiber and evaluates nanotube-reinforced composite properties via two material modeling techniques considering the variable scale effect due to hybridization.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Chemistry, Physical
Bowen Gao, Mingxuan Sun, Wen Ding, Zhipeng Ding, Wenzhu Liu
Summary: A series of gamma-graphyne/TiO2 nanotube array heterostructures were synthesized by a simple and environmentally friendly method. The modified heterostructures showed improved performance in photoelectrocatalytic degradation and nitrogen fixation, indicating great potential for applications in photoelectrochemical and photoelectrocatalytic processes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Meilan Pan, Shuang-yin Tang-hu, Chenhao Ni, Haihua Chen, Bingjun Pan
Summary: Fluorine-containing fluoroquinolones, as cumulative toxins, pose a serious threat to the health of animals and humans. This study focuses on the electrochemical degradation and defluorination of levofloxacin (LVF) using Ti(III)-laden TiO2 nanotube arrays (RTNA). The results show that LVF degradation kinetics on RTNA is significantly improved compared to TiO2 nanotube arrays (TNA) due to the presence of Ti(III) and oxygen vacancies. The role of sulfate in electrolyte is found to be crucial for the defluorination efficiency, where sulfate radicals (SO4-center dot) play a dominant role in breaking the C-F bond of LVF.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Kaihang Zhang, Yuanzheng Zhang, Su Liu, Xin Tong, Junfeng Niu, Dong Wang, Junchen Yan, Zhaoyang Xiong, John Crittenden
Summary: In this study, a MnOx-TiO2 NTAs anode was prepared by compositing narrow bandgap manganese oxide (MnOx) with TiO2 nanotube arrays (TiO2 NTAs). Electrochemical characterizations revealed that increasing the composited concentration of MnOx improved the conductivity and reduced the oxygen evolution potential, thus enhancing the electrochemical activity of the MnOx-TiO2 NTAs anode. Moreover, the optimal degradation rate of benzoic acid (BA) was achieved by adjusting the MnOx concentration and degradation voltage. These quantitative results are of great significance for the design and application of high-performance materials for electrochemical advanced oxidation processes (EAOPs).
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Materials Science, Coatings & Films
Junling Qin, Zhiguang Cao, Hui Li, Zixue Su
Summary: TiO2 nanotubes with a diameter down to around 6 nm were successfully fabricated in ammonium fluoride-containing ethylene glycol electrolyte through a one-step anodic oxidation method. By systematically studying the influences of various factors, the growth mechanism of TiO2 nanotubes with ultra-small pore diameter and cell size was revealed.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Radha Bhardwaj, Arnab Hazra
Summary: Diverse metal oxide semiconductors play important roles in chemical sensing applications. In this study, SrTiO3-TiO2 heterostructured nanotube arrays were successfully designed by growing different quantities of SrTiO3 on TiO2 nanotubes. The sensors exhibited selective response to ethanol, excellent response magnitude, and fast response time. Additionally, the sensors showed good stability, low detection limit, and good selectivity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Sonja Wieland, Abdurrahman Ali El Yumin, Jan M. Gotthardt, Jana Zaumseil
Summary: Trions are charged excitons formed in low-dimensional semiconductors upon optical or electrical excitation in the presence of charge carriers. Trion emission in semiconducting single-walled carbon nanotubes (SWCNTs) occurs in the near-infrared and at lower energies compared to exciton emission. The influence of different dielectric materials on exciton and trion emission in SWCNT-based top-gate field-effect transistors is investigated, showing a clear dependence on the charge trapping properties of the dielectrics. The ratio of trion to exciton emission and the exciton blue-shift are not suitable as quantitative metrics for doping levels.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Junwoo Lee, Duck Hoon Lee, Younghoon Kim, Jin Young Park, Hyung Ryul You, Taiho Park, Minjun Kim, Jongmin Choi
Summary: A novel benzodifuran-based hole-transporting material (HTM) was synthesized, which exhibited improved optoelectrical properties, solubility, and thermal stability compared to a typical benzodithiophene-based HTM. The benzodifuran-based HTM showed enhanced performance in quantum dot solar cells, achieving higher open-circuit voltage and power conversion efficiency.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Haeryang Lim, Insu Jeong, Jiyong Choi, Giwon Shin, Jeongsu Kim, Tae-Hyun Kim, Taiho Park
Summary: An aryl ether-free polymer with pendent ammonium groups and propyl spacers was synthesized. The propyl spacers improved the flexibility of the polymer and allowed for effective ionic cluster formation. The resulting polymer exhibited excellent membrane-forming properties, high ionic conductivity, alkaline stability, and cell performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dokyoung Kim, Dohyun Kim, Sehun Oh, Taiho Park, Kijung Yong
Summary: This study successfully enhanced the HER activity in alkaline solutions by incorporating oxophilic metals into WP/WOx films. Nanostructure engineering was employed to further improve the HER performance, and the prepared Co:WP/WO NWs catalyst exhibited superior performance in alkaline media.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Kochan Sathyaseelan Bejoymohandas, Hae Un Kim, Sunyoung Sohn, Wanuk Choi, Sungjune Jung, Filippo Monti, Taiho Park
Summary: Three new cationic cyclometalated iridium(III) complexes with different substituents have been synthesized and characterized. The electronic properties of these complexes have been tuned by changing the substituents on the ligands. The emission of all complexes arises from ligand-centered triplet states with different photoluminescence quantum yields.
INORGANIC CHEMISTRY
(2023)
Article
Energy & Fuels
Hyun Ho Shin, Junil Choi, Taiho Park, Won Bae Kim
Summary: Anode-supported proton-conducting solid oxide fuel cells (PC-SOFCs) fabricated with two different proton-conducting oxides, BaCe0.7Zr0.1Y0.1Yb0.1O3-delta (BCZYYb) and BaZr0.8Y0.2O3-delta (BZY), were compared to investigate their electrochemical performances when fueled with syngas. The BCZYYb cells exhibited higher maximum power density (MPD) than the BZY cells when operating on H-2, but degraded more rapidly when operating on syngas. Decreasing the anode thickness improved the stability of BCZYYb cells on syngas. Heterogeneous catalysis experiments showed no significant difference in catalytic activity between the anode powders prepared with the two proton-conducting oxides.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Polymer Science
Sang Ah Park, Do Hui Kim, Yelim Choi, Dae Hwan Lee, Taiho Park, Shinuk Cho, Minjun Kim
Summary: Molecular self-aggregation and crystallization behavior of a newly synthesized asymmetrically incorporated fluorine atom polymer (asy-PNDI1FTVT) were found to differ from two symmetric acceptor polymers. The asy-PNDI1FTVT exhibited lower crystallinity compared to the symmetric polymers. In performance tests of inverted polymer solar cells, PTB7-Th:asy-PNDI1FTVT showed a well-mixed morphology and enhanced charge dissociation, leading to an increase in short-circuit current and power conversion efficiency.
Article
Nanoscience & Nanotechnology
Sang Ah Park, Do Hui Kim, Dasol Chung, Jeongsu Kim, Taiho Park, Shinuk Cho, Minjun Kim
Summary: Tailoring the blend morphology of bulk heterojunctions (BHJs) has been successful in improving the thermal stability of organic solar cells (OSCs). In this study, thermally stable OSCs were demonstrated in a ternary blended system comprising low-crystalline semiconducting polymers (asy-PNDI1FTVT and PTB7-Th) and a non-fullerene acceptor (Y6). The optimized blend system showed a well-mixed morphology at the BHJ, leading to enhanced charge dissociation and improved fill factor and power conversion efficiency. The ternary blend of PTB7-Th:Y6:asy-PNDI1FTVT suppressed phase separation, resulting in negligible burn-in loss and performance degradation under thermal stress. The experiments showed that the devices retained over 90% of their initial efficiencies after 100 hours at 65 degrees C, indicating significant potential for the development of thermally stable OSCs with reasonable efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Hae Un Kim, Taehyun Kim, Chanhyeok Kim, Taiho Park, Sunyoung Sohn
Summary: This study introduces two novel deep-red to near-infrared (NIR) light-emitting curcuminoid boron difluoride derivatives, tBuPZ and PZ, for organic light-emitting diodes. The maximum external quantum efficiency achieved was 4.11% and 3.92%, respectively, with electroluminescence at 618 nm and a shoulder peak at 673 nm. The correlations between electron-donating strength, emission mechanism, and quantum efficiency were investigated by analyzing the donor characteristics of di-tert-butyl substitution. This study presents a methodology for designing low-toxicity, dye-derived, purely organic NIR light-emitting molecules.
Article
Multidisciplinary Sciences
Dace Gao, Gurunathan Thangavel, Junwoo Lee, Jian Lv, Yi Li, Jing-Hao Ciou, Jiaqing Xiong, Taiho Park, Pooi See Lee
Summary: In this article, the authors present a new iontronic adhesive for designing a soft iontronic gripper with self-healability, tunable adhesion, and rapid release. This adhesive provides a promising route for augmenting robotic functionalities with continuous and reversible adhesion force.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dae Hwan Lee, Seyeong Lim, Chanhyeok Kim, Han Uk Lee, Dasol Chung, Yelim Choi, Jongmin Choi, Younghoon Kim, Sung Beom Cho, Hong Il Kim, Taiho Park
Summary: Researchers designed three types of dopant-free hole transport materials for perovskite quantum dot solar cells, and the optimized material, Asy-PSeDTS, achieved the highest power conversion efficiency (PCE) and stability among dopant-free HTM-based PQD-SCs so far, maintaining 80% of the initial PCE after 40 days.
ACS ENERGY LETTERS
(2023)
Review
Chemistry, Physical
Zobia Irshad, Wonjong Lee, Muhammad Adnan, Yelim Choi, Taiho Park, Jongchul Lim
Summary: This review discusses the potential of multijunction tandem solar cells in photovoltaic evolution, highlighting key challenges and proposed solutions, particularly focusing on the bandgap energies of light absorbers and charge carrier dynamics. Through comprehensive research from various perspectives, the importance of addressing current-matching issues to promote the development of 2-T TSCs is emphasized.
Article
Chemistry, Physical
Jun-Ho Park, Youjin Reo, Ju-Hyun Jung, Taehyun Kim, Taiho Park, Yong-Young Noh, Cheol-Joo Kim
Summary: In this study, it was demonstrated that the van der Waals contact of aluminum onto a two-dimensional tin halide perovskite significantly enhanced the photoluminescence intensity, reaching a record-high PL quantum yield of 10%. The study emphasizes the importance of controlling electronic doping to optimize luminescence efficiency in low-dimensional perovskites.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Dohyun Kim, Hyuntae Choi, Wooteak Jung, Chanhyeok Kim, Eun Young Park, Sungryong Kim, Nam Joong Jeon, Seulki Song, Taiho Park
Summary: In order to improve the efficiency and stability of perovskite solar cells (PSCs), a method of interfacial engineering involving thermal phase transition is used in this study. By liquidizing alkylammonium formates at low temperatures, the perovskite grain boundaries can be effectively modified, leading to enhanced thermal stability and moisture stability of the PSCs. This strategy has successfully achieved highly efficient and stable PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Environmental
Taehyun Kim, Sunyoung Sohn, Sungjin Park, Wanuk Choi, Hyungju Ahn, Sungjune Jung, Taiho Park
Summary: In this study, three asymmetric heavy-atom-free multifunctional triplet-harvesting emitters were synthesized, and the optimized radiative characteristics were achieved through the incorporation of intramolecular hydrogen bonding. The intramolecular hydrogen bonding also enabled various emission properties, such as aggregation-induced emission, mechanochromic luminescence, thermally activated delayed fluorescence, and room-temperature phosphorescence, in the solid state.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Haeryang Lim, Jae-Yeop Jeong, Dae Hwan Lee, Shin-Woo Myeong, Giwon Shin, Dayeong Choi, Won Bae Kim, Sung Mook Choi, Taiho Park
Summary: In this study, a novel aryl ether-free poly(fluorene) anion exchange membranes (AEMs) were developed and their morphology and conformation were analyzed. It was found that PFPB-QA, with the lowest glass transition temperature, exhibited the most oriented structure and well-connected ion transport channels, achieving high conductivity and alkaline stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)