Article
Materials Science, Multidisciplinary
Jonas Klein, Seyyed Mohsen Beladi-Mousavi, Marco Schleutker, Dereje Hailu Taffa, Markus Haase, Lorenz Walder
Summary: The study demonstrates the electrochemical luminescence switching of LaPO4:Ce, Tb nanoparticles assembled into nonconducting thin films using two electrocatalytic processes. The redox shuttles are used to access the Ce3+/4+ species for electrochemical reactions due to the insulating nature of the nanoporous films. By assembling a device that allows UV light to enter the nanoparticle layer, repetitive luminescence switching is observed.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yihan Shi, Miguel A. Soto, Mark J. MacLachlan
Summary: Researchers have demonstrated a new method to control the diffusion of guest molecules within cellulose nanocrystal (CNC) matrices by modifying the structural composition of the guests, leading to controlled and colorful host-guest self-assembly processes.
ACS APPLIED NANO MATERIALS
(2022)
Article
Multidisciplinary Sciences
Yuening Zhang, Xujin Qin, Xuefeng Zhu, Minghua Liu, Yuan Guo, Zhen Zhang
Summary: This study investigates the mechanism of chirality transfer in supramolecular self-assembled structures at the air/water interface. Long-range chirality transfer is observed, with the chirality being transferred first to amide groups and then to the anthracene unit through intermolecular hydrogen bonds and -pi stacking. Finally, the chirality is transferred to the end of hydrophobic alkyl chains at the interface.
NATURE COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Masoud Hajiakbari Fini, Mohamad Esmail Hamedani Golshan, Jose R. R. Marti, Abbas Ketabi
Summary: This study proposes an optimization problem to address the issues caused by replacing conventional generating units with inverter-based generation. By increasing the inertia of the grid through virtual inertia, synchronous machines, and fast primary frequency response, it is possible to mitigate frequency deviations and frequency rate of change problems. The proposed method calculates the capacity of ultracapacitors and synchronous condensers, considering both technical and economic metrics.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Chemistry, Physical
Qiwei Wang, Yang Li, Weichan Si, Wenyu Tan, Gao Cheng, Lin Yu, Wei Ran, Jianfang Chen, Yi-Ming Zhao, Chaoling Wu, Wei Liu, Lei Shen, Qiang Wang
Summary: We synthesized self-assembled (4 0 0)-orientation lithium titanate (SA-LTONF) with ultrafine nanoparticles and an organic carbon coating, which exhibited excellent electro-chemical performance. Density functional theory (DFT) calculations provided insights into the orientation-dependent electrochemical mechanism and atomically dynamic mechanism of gas generation and ultrafast lithium-ion transportation in lithium titanate.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Jana Kocabova, Frantisek Vavrek, Stepanka Novakova Lachmanova, Jakub Sebera, Michal Valasek, Magdalena Hromadova
Summary: Self-assembled monolayers (SAMs) of terpyridine-based transition metal (ruthenium and osmium) complexes anchored to gold substrate via tripodal anchoring groups were studied as potential redox switching elements for molecular electronics. The electrochemical study was complemented by atomic force microscopy (AFM) and scanning tunneling microscopy (STM) methods. It was observed that SAMs of Os-tripod molecules had larger adlayer structures compared to SAMs of Ru-tripod molecules, characterized by evenly distributed small islands. Furthermore, upon cyclic voltammetric experimentation, Os-tripod films rearranged to form a smaller number of larger islands, similar to the Ostwald ripening process. Os-tripod SAMs exhibited higher surface molecule concentration and lower conductance compared to Ru-tripod SAMs. The attenuation factor of Os-tripod films changed significantly to a higher value during electrochemical cycling, consistent with previous electron transfer kinetics studies.
Article
Green & Sustainable Science & Technology
Ali Akbar, Jiawen Liu, Sung-Jae Chung, Sukkee Um
Summary: This study presents a robust compression model based on the unit-cell beam bending theory to predict the mechanical behavior of fibrous porous transport layers (PTLs) under various clamping pressures. The model shows good agreement with experimental data and reveals that adding binder/PTFE to fibrous substrates decreases porosity and increases mechanical strength of PTLs. Moreover, detailed three-dimensional microscale deformation simulations indicate that the statistical mean strain of PTLs is exponentially proportional to porosity.
Article
Chemistry, Analytical
Yexuan Mao, Meng Dang, Jianwei Zhang, Xianqing Huang, Mingwu Qiao, Lianjun Song, Qiuyan Zhao, Mingyue Ding, Youyi Wang, Zizhe Li, Ke Song, Qingge Shi, Xiya Zhang
Summary: In this study, a novel strategy was developed to improve the sensitivity of electrochemical sensors for detecting total aflatoxins by using peptide amphiphile C14R5 to inspire the ordered self-assembly of gold nanocomposites. The developed sensor demonstrated a wide linear range and a low limit of detection, making it suitable for food safety applications.
Article
Energy & Fuels
Jayaraman Kalidass, Sambandam Anandan, Thirugnanasambandam Sivasankar
Summary: In this study, high crystalline mesoporous magnetite nanoparticles were successfully synthesized through a one-pot sonoelectrochemical method and structurally anchored into reduced graphene oxide nanosheets. The performance analysis showed significant improvements compared to bare magnetite electrode, making it suitable for high-rate real-time applications in Li-ion batteries.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Spectroscopy
Jing Tang, Zifan Wang, Qishuo Tan, Jun Cao, Xi Ling
Summary: The investigation of twisted stacked few-layer MoS2 has revealed novel properties and requires a noninvasive technique for characterizing the layered architecture. This study proposes a machine learning-assisted low-frequency Raman spectroscopy method to characterize the twist angle of few-layer stacked MoS2 samples. The approach involves a feedforward neural network and provides insight into interlayer interactions.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Materials Science, Ceramics
Daichao Gao, Jiaxin Yang, Dongyun Zhang, Chengkang Chang
Summary: A strategy to enhance the electrochemical performance of a single-crystal LiNixMnyCozO2 (NCM) electrode is proposed, which involves aligning the crystal along the c-axis under a 0.4 T magnetic field. The aligned electrode shows inhibited polarization, increased conductivity, improved cyclability, and better rate performance compared to the electrode without magnetic treatment. This strategy has the potential for application in lithium-ion batteries for electric vehicles.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Xiaoxia Chang, Jing Li, Haocheng Xiong, Haochen Zhang, Yifei Xu, Hai Xiao, Qi Lu, Bingjun Xu
Summary: This study experimentally confirms that the rate-determining step in the electrochemical CO reduction reaction on Cu catalysts is the hydrogenation of CO with adsorbed water, rather than the CC coupling reaction. This finding contributes to a better understanding of the mechanism of the CO reduction reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Xiaoxia Chang, Jing Li, Haocheng Xiong, Haochen Zhang, Yifei Xu, Hai Xiao, Qi Lu, Bingjun Xu
Summary: This study determined CO adsorption isotherms on Cu catalysts in a broad pH range and suggested that the C-C coupling is unlikely to be the rate-determining step in the electrochemical CO reduction reaction. Instead, the hydrogenation of CO with adsorbed water is proposed as the rate-determining step, with site competition between CO and water leading to the observed transition of the CO reaction order.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Ziyu Zhao, Jinxing Liu, Amir Siddiq
Summary: In this study, it was found through molecular dynamics simulations that high-frequency vibration can induce softening in single-crystal aluminum specimens, with the softening increasing as the vibration amplitude increases. Factors such as lattice orientation, tensile strain rate, and a preset notch were considered, showing influences on peak stress and plasticity. The atomic structure evolution revealed insights into dislocation behavior under different strain rates, impacting the resulting strain-stress curves.
Article
Chemistry, Physical
Raju R. Kumal, Srikanth Nayak, Wei Bu, Ahmet Uysal
Summary: Ion adsorption and transfer at charged interfaces are crucial in industrial and environmental processes. This study investigates SeCN- adsorption on a floating charged monolayer, revealing that the orientation and coverage of SeCN- ions change with increasing KSeCN concentration. The reorganization of interfacial ions and water is important for chemical separations of heavy metals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Electrochemistry
Daniel Jun, J. Thomas Beatty, Dan Bizzotto
Article
Electrochemistry
Jan-carlo M. Diaz-Gonzalez, Ricardo A. Escalona-Villalpando, Luis G. Arriaga, Shelley D. Minteer, Jannu R. Casanova-Moreno
ELECTROCHIMICA ACTA
(2020)
Article
Chemistry, Multidisciplinary
Kaylyn K. Leung, Isaac Martens, Hua-Zhong Yu, Dan Bizzotto
Article
Chemistry, Physical
Isaac Martens, Lis G. A. Melo, Marcia M. West, David P. Wilkinson, Dan Bizzotto, Adam P. Hitchcock
Article
Chemistry, Multidisciplinary
Tianxiao Ma, Isaac Martens, Dan Bizzotto
Article
Nanoscience & Nanotechnology
Carlos Luis Gonzalez-Gallardo, Alberto Diaz Diaz, Jannu R. Casanova-Moreno
Summary: Narrow electrode connectors were found to improve the sealing of PDMS to silicon substrates, preventing leaks. Finite element modeling suggests that PDMS deformation under pressure in the channel is responsible for the sharp increase in leak resistance. Therefore, the use of narrow electrode connectors is recommended to ensure no solution leaking while using the simple and widely used plasma bonding method.
MICROFLUIDICS AND NANOFLUIDICS
(2021)
Article
Multidisciplinary Sciences
Daniel Jun, Sylvester Zhang, Adrian Jan Grzedowski, Amita Mahey, J. Thomas Beatty, Dan Bizzotto
Summary: The use of biomacromolecules in clean alternative energies is a developing field, with potential applications in biosensors and biophotovoltaic devices. Research has shown that the assembly of bacterial photosynthetic reaction center (RC) on electrodes and its local environment significantly impact photocurrent generation, with implications for electron transfer of other biomacromolecules in sensor and photovoltaic applications.
Article
Electrochemistry
Zhiguang Liu, Adrian Jan Grzedowski, Yujing Guo, Dan Bizzotto
Summary: Electrodeposited graphene oxide (GO) onto a single crystal gold bead electrode exhibited optimal deposition uniformity, and significant improvement in electrochemical characteristics was achieved through potential pulse treatments. The ERGO modified gold surface prepared using electrodeposition followed by potential pulse treatments resulted in surfaces that are more conductive and electrochemically active.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Isaac Martens, Antonis Vamvakeros, Nicolas Martinez, Raphael Chattot, Janne Pusa, Maria Valeria Blanco, Elizabeth A. Fisher, Tristan Asset, Sylvie Escribano, Fabrice Micoud, Tim Starr, Alan Coelho, Veijo Honkimaki, Dan Bizzotto, David P. Wilkinson, Simon D. M. Jacques, Frederic Maillard, Laetitia Dubau, Sandrine Lyonnard, Arnaud Morin, Jakub Drnec
Summary: The degradation of platinum catalyst in hydrogen fuel cell systems is found to be influenced by nanoscale hydration gradients, resulting in heterogeneous degradation of catalyst nanostructure. This highlights the importance of real-time device-level characterization for assessing the performance and durability of electrocatalysts in complex operating environments.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Analytical
Tianxiao Ma, Dan Bizzotto
Summary: This study investigated methods for improving the thermal stability and homogeneity control of low DNA probe density in DNA SAM-based sensors. It found that low-coverage DNA SAMs prepared using potential-assisted thiol exchange showed better thermal stability and DNA probe mobility compared to those prepared without control over substrate potential. This approach is expected to result in superior DNA hybridization efficiencies and longer shelf-life for advanced sensors.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Daniel Jun, Glenn Sammis, Pouya Rezazadeh-Azar, Erwann Ginoux, Dan Bizzotto
Summary: The opioid overdose crisis in North America worsened during the COVID-19 pandemic, surpassing the death toll of the virus. The rapid and quantitative detection of fentanyl remains a significant challenge. In this study, an electrochemical-based fentanyl analytical detection strategy was developed, which utilized a modified electrode for sensitive detection of fentanyl.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Tianxiao Ma, Adrian Jan Grzedowski, Thomas Doneux, Dan Bizzotto
Summary: In this study, a novel approach combining electrochemical and optical methods was used to investigate the properties of molecular monolayer interfaces, with a focus on detecting DNA hybridization. The results showed that the fluorescence intensity of the surface can be controlled by redox electrochemistry, and it depends on factors such as the potential controlling the oxidation state of the redox tag, the surface density of DNA, the composition ratio of the labeled and unlabeled DNA strands, and the local environment. The electrochemical-fluorescence measurements demonstrated improved detection of hybridized DNA compared to traditional electrochemical measurements, and the method also provided insights into the spatial heterogeneity of electron-transfer kinetics and the influence of the local interfacial environment.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Analytical
L. Navarro-Nateras, Jancarlo Diaz-Gonzalez, Diana Aguas-Chantes, Lucy L. Coria-Oriundo, Fernando Battaglini, Jose Luis Ventura-Gallegos, Alejandro Zentella-Dehesa, Goldie Oza, L. G. Arriaga, Jannu R. Casanova-Moreno
Summary: The performance of second-generation electrochemical enzymatic biosensors for glucose detection in cell culture media is presented in this study. Glutaraldehyde and EGDGE were used as cross-linkers to immobilize glucose oxidase and an osmium-modified redox polymer on carbon electrodes. These sensors showed less vulnerability to complex biological media compared to first-generation sensors. Pencil leads were successfully incorporated as electrodes in a PDMS microfluidic channel, offering a low-cost solution.
Article
Chemistry, Multidisciplinary
Dan Bizzotto, Tianxiao Ma, Adrian Jan Grzedowski, Thomas Doneux
Summary: This study introduces a method that uses redox electrochemistry to control surface-based fluorescence intensity for detecting DNA hybridization and studying the uniformity of the surface response. By introducing fluorescent dyes and redox tags on single-strand DNA, significant changes in fluorescence intensity were observed. Comparing electrochemical-fluorescence measurements to electrochemical measurements showed improved performance in detecting hybridized DNA.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Isaac Martens, Raphael Chattot, Miika Rasola, Maria Valeria Blanco, Veijo Honkimaki, Dan Bizzotto, David P. Wilkinson, Jakub Drnec
ACS APPLIED ENERGY MATERIALS
(2019)