bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adaptation of a Vanadium Redox Flow Battery for Thermal Applications Using a Solid Capacity Booster
Authors: Berling Sabrina , Hidalgo Jose Manuel , Mavrikis Sotirios , Patil Nagaraj , Garcia - Quismondo Enrique , Palma Jesus , Ponce de Leon Carlos 
Published: February 2024

In this work a novel approach for the use of the Vanadium Redox Flow Batteries (VRFB) is made by viewing it as a dual system with the ability to store both electrical and thermal energy. Electrical energy is thanks to the electrochemical reactions of the vanadium ions dissolved in the electrolyte, while thermal energy will use the sensible heat of the electrolyte mass.
The performance of VRFB has been widely studied over the last 40 years and there is an extensive bibliography on the subject regarding the electrochemical performance attending only to the conventional energy storage requirements, but the hybrid electrical-thermal function is a novel subject that has been scarcely explored. One of the most critical aspects is the narrow operating temperature range of these batteries (15-40°C) that strongly limits their thermal energy storage capacity.
Practical vanadium electrolytes operate with electrolytes containing a vanadium concentration between 1.6 and 2.0 M, and usually also employ cooling and heating systems to maintain the temperature between 15 and 40ºC. In particular, at temperatures below 15ºC the slower reaction kinetics, high viscosity and reduced conductivity of the concentrated electrolytes introduce remarkable energy losses in the battery. On the other hand, at temperatures over 35ºC the positive electrolyte is not stable due to the limited solubility of VO2
+ species. High temperatures also boost the kinetics of parasitic reactions such as hydrogen and oxygen evolution, thus increasing energy losses.
In this study, we address these limitations aiming to open up new possibilities of a successful integration of vanadium redox flow batteries into thermal applications. For this, the functionality and stability limits of a diluted vanadium electrolyte are analyzed for an extended operational temperature window from 5ºC to 50ºC and compared to commercial electrolyte formulations. In a second step, the use of a solid capacity booster is investigated to compensate the loss of energy density due to electrolyte dilution.
[1] S. Berling, S. Mavrikis, N. Patil, E. García – Quismondo, J. Palma, C. Ponce de León “Lignin as redox-targeted catalyst for the positive vanadium electrolyte”, Electrochemistry Communications 142 (2022) 107339.
[2] S. Berling, J. M. Hidalgo, N. Patil, E. García - Quismondo, J. Palma, C.Ponce de León, “A mediated vanadium flow battery: Lignin as redox-targeting active material in the vanadium catholyte”. Submitted
Manufacturing Strategies for Engineering Carbon Electrodes Via Non-Solvent Induced Phase Separation
Authors: Jacquemond Remy Richard , Wan Charles Tai-Chieh , Brushett Fikile R. , Forner-Cuenca Antoni 
Published: February 2024

Porous electrodes are at the core of emerging electrochemical systems and tuning the electrode properties is critical to overcome system-specific limitations. To meet the stringent performance and cost requirements, there is a need for tailored microstructures generated through inexpensive and scalable synthesis methods with precursors originating from reliably-sourced, globally-abundant feedstocks. To this end, we recently introduced a manufacturing route using non-solvent induced phase separation (NIPS), yielding porous carbon electrodes with multimodal and interconnected porosity. The synthesized NIPS electrodes demonstrated a beneficial trade-off between transport properties (permeability, mass transfer) and electrochemically active surface area (ECSA) resulting in high performance in iron and all-vanadium redox flow batteries (RFBs)[1,2]. Moreover, NIPS manufacturing offered control over electrode characteristics (pore size, surface area) which are critical parameters for broader electrochemical devices. Besides its use for RFB application, we hypothesize that the electrode morphologies resulting from NIPS could be applied to a broader range of electrochemical systems employing porous electrodes. Consequently, here we focus on extending the library of electrode microstructures achievable via NIPS through the alteration of simple process parameters.
In this presentation, I will discuss our latest advances on the bottom-up manufacturing of porous electrodes using NIPS targeting porosity gradients and high ECSA materials. For the former, we introduce the use of a control layer, casted on top of the NIPS polymer solution at the interface with the coagulation bath, thereby altering the rate of the phase separation process. We investigate various process parameters such as the composition, viscosity, and thickness of the control layer and assess their effect onto the resulting microstructures. The NIPS method assisted by a control layer generates porosity gradients, resulting in a slight increase of the electrode ECSA at the cost of a higher pressure drop. To further increase the ECSA of the prepared electrodes, we also propose nano-patterning approaches to significantly enhance ECSA through addition of nano-scale porosity without compromising the pressure drop through the porous structure. Finally, both porosity gradient and nano-patterned NIPS electrodes are tested in a all-vanadium redox flow cell to extract microstructure-performance relationships. Despite being in its early technological stage, this work illustrates the versatility of NIPS to manufacture porous electrodes through a very broad microstructural design space.

References

[1] R. R. Jacquemond, C. T.-C. Wan, Y.-M. Chiang, Z. Borneman, F. R. Brushett, K. Nijmeijer, A. Forner-Cuenca, Cell Reports Physical Science
2022, 3, 100943.
[2] C. T. Wan, R. R. Jacquemond, Y. Chiang, K. Nijmeijer, F. R. Brushett, A. Forner‐Cuenca, Adv. Mater.
2021, 33, 2006716.
Deposition of Composite Nanoparticle-Based Thin Films for Gas Sensing
Authors: Capek Jiri , Shaji Kalyani , Haviar Stanislav , Zeman Petr 
Published: February 2024

Working principle of conductometric gas sensors is based on modulation in electrical conductivity of the sensing material due to adsorption-desorption reactions between the target gas and the sensor surface. Nano-structuring the sensing material increases the effective surface area for interaction between the target gas and the sensing material thereby enhancing the sensorial response. Metal oxide semiconductors (MOS) have shown remarkable sensing performance to oxidizing and reducing gases. The combination of different MOS has often demonstrated to synergistically improve the gas sensing performance via the formation of highly sensitive heterojunctions at their interface.
In this work, we deposited thin films composed of nanoparticles (NPs) of p-type CuOx and n-type WOx to enhance the effective surface area of the material and to realize the maximum number of nano p-n heterojunctions in the material. The films were prepared using the Nanogen-Trio NP source equipped with three 1′′ magnetrons, mounted on a custom-built deposition chamber and sputtered by a DC power supply. Depositions were executed in Ar+O2 gas mixture. The O2 admixture may significantly enhance the mass flux of NPs. Furthermore, the O2 admixture allows one to tune the desired stoichiometry of the respective metal oxides. On the other hand, the pronounced hysteresis complicates the deposition of WOx NPs. The deposition process was controlled using an in-house developed software to prepare thin films composing a mixture of NPs with a defined volumetric ratio of the individual materials.
This work demonstrates the versatility of our custom-built gas aggregation source that facilitates the preparation of multi-composite NP-based thin film giving the best sensorial response.
Fabrication of a Palladium Hydride pH Microelectrode with an Extended Lifetime
Authors: Li Yuanjiao , Mauzeroll Janine , Perry Samuel Charles 
Published: February 2024

Stable miniaturized pH microelectrodes are crucial in exploring localized pH changes, but most suffer from instability and short lifetimes. Palladium hydride in a mixer phase has been reported to measure the solution pH taking advantage of the interaction between the alloyed hydrogen atoms and hydrogen ions in the solution. However, with the escape of the hydrogen atoms from the palladium lattice, the palladium hydride will transition to single phase and become invalid for pH measurement. The duration of the mixer-phase palladium hydride is even shorter as the sensor is made small. A method to stabilize the mixer-phase is needed for the development of palladium hydride sensors.
A method of synthesizing the mixer-phase palladium hydride in dimethylformamide at an elevated temperature has been reported. The synthesized palladium hydride can be stable under aerobic conditions. We used the stable palladium hydride to fabricate a pH microelectrode. In contrast to electrochemically generated palladium hydride microelectrodes, chemically generated palladium hydride microelectrodes are longer lasting and importantly have good an analytical performance under aerobic conditions. Chemically generated palladium hydride microelectrodes perform best in acid to neutral electrolytes devoid of Cl-. They can readily be produced on 10 µm diameter disk platinum microelectrodes, which makes them attractive candidates for future localized electrochemical studies.
High-Sensitivity Hydrogen Sulfide Electrochemical Gas Sensor Based on CNT/Pt Cluster Electrode
Authors: Kwon JinBeom , Jung Daewoong , Ha Yuntae , Choe SuJi , Baek Soobeen , Jung Dong Geon , Kang Byoungho 
Published: February 2024

Recently, due to the development of industrial technology, harmful gases discharged from industrial sites are gradually increasing, and as a result, inconvenience and civil complaints due to odor in the community are rapidly increasing. Among several types of harmful gases, hydrogen sulfide (H2S) is a colorless representative harmful gas that can cause pain through irritation of the mucous membranes of the eyes and respiratory tract, and can cause central nerve paralysis and suffocation at the same time when exposed to high concentrations. In addition, H2S is not only harmful to the human body, but also can create an unpleasant feeling by causing an odor even in a very small amount. Therefore, in order to manage H2S, research on a gas sensor capable of quickly and stably detecting H2S has been actively conducted. Most of the sensors that have been studied in the past are metal oxide-based semiconductor H2S gas sensors, which have high sensitivity, but have disadvantages in that low selectivity and high-temperature operating conditions are required. On the other hand, the electrochemical gas sensor can measure H2S gas with high selectivity because a chemical reaction occurs with respect to a specific gas depending on the type of electrolyte and electrode, and a potential difference due to electrons generated thereby is measured. Therefore, in this study, a CNT/Pt-based electrochemical H2S gas sensor capable of detecting at room temperature with high selectivity for H2S was developed. After forming a CNT thin film on a PTFE membrane, Pt was deposited through an E-beam to fabricate a working electrode capable of selectively detecting only H2S, and applied to an electrochemical H2S gas sensor using sulfuric acid (H2SO4) electrolyte. H2S was measured at a concentration of 100 to 10 ppm in units of 10 ppm using the manufactured CNT/Pt-based electrochemical H2S gas sensor. As a result, the amount of current change was confirmed to be 100uA at a concentration of 100 ppm, and the response time and recovery time were confirmed to be about 10 seconds.
This work was supported by the Korea Innovation Foundation(INNOPOLIS) grant funded by the Korea government(MSIT) (2020-DD-UP-0348). This study has been conducted with the support of the Korea Institute of Industrial Technology as "Development of a thermal convection-type flow sensor with high-sensitivity for emergency patients breathing monitoring in real-time" (Kitech UI-23-0012).
Understanding Neurotransmission Using Single Vesicle Electrochemistry
Authors: Li Xianchan 
Published: February 2024

Exocytosis is one of the essential steps for chemical signal transmission between neurons. In this process, vesicle docks and fuses with the plasma membrane and release the stored neurotransmitters through exocytotic pore into the extracellular space, and all of these steps are governed with various molecules, such as proteins, ions and even lipids. Quantitatively monitoring vesicular neurotransmitter release in exocytosis and initial neurotransmitter storage in individual vesicles are significant in order to study mechanisms of neurotransmission and malfunction in disease. Recently, we developed new approaches to characterize the contents of mammalian vesicles isolated, in situ or in vivo, termed as intracellular vesicle impact electrochemical cytometry.[1] In this approach, nanoscale mammalian vesicles are allowed to adsorb to electrodes and subsequently rupture thereby expelling their contents eliciting an oxidation current that can be used to quantify the catecholamine contents of the vesicles.[
2-5] Combined with exocytotic release measurements with single cell amperometry, it is a unique technique for understanding neuronal transmission and investigating the pharmacology or toxicology of drugs on chemical signaling related biological functions, for example, learning and memory.[6-15]

References
[1] Li, X.;# Majdi, S.;# Dunevall, J.; Fathali, H.; Ewing, A. G.* Angew. Chem., Int. Ed. 2015, 54, 11978−11982.
[2] Li, X.; Dunevall, J.; Ren, L.; Ewing A. G.* Anal. Chem. 2017, 89, 9416−9423.
[3] Li, X.; Ren, L.; Dunevall, J.; Ye, D.; White, H. S.; Edwards, M. A.; Ewing, A. G.* ACS Nano, 2018, 12, 3010−3019.
[4] Li, X;# Dunevall, J.;# Ewing A. G.* Acc. Chem. Res. 2016, 49, 2347−2354.
[5] Phan, N. T. N.; Li, X.; Ewing A. G.* Nat. Rev. Chem. 2017, 1, 0048.
[6] Li, X.; Dunevall, J.; Ewing, A. G.* Angew. Chem., Int. Ed. 2016, 55, 9041−9044.
[7] Mohammadi, A. S.;# Li, X;# Ewing A. G.* Anal. Chem. 2018, 90, 8509−8516.
[8] Xiao, T.; # Li, X.; # Wei, H.; Ji, W.; Yue, Q.; Yu, P.; Mao, L.*. Anal. Chem. 2018, 90, 13783-13789.
[9] Wang, D.;# Li, X.; #Jiang, Y.; Jiang, Y.; Ma, W.; Yu, P.; Mao, L.*. ACS Chem. Neurosci. 2019, 10, 2576-2583.
[10] Yue, Q.; # Li, X.;# Wu, F.; Ji, W.; Zhang, Y.; Yu, P.; Zhang, M.; Ma, W.; Wang, M.; Mao, L.* Angew. Chem., Int. Ed. 2020, 59, 11061−11065.
[11] Thomen, A.; Najafinobar, N.; Penen, F.; Kay, E.; Upadhyay, P. P.; Li X.; Phan, N. T. N.; Malmberg, P.; Klarqvist, M.; Andersson, S.; Kurczy, M. E.*, Ewing, A. G.* ACS Nano 2020, 14, 4, 4316-4325.
[12] Liu, Y.; Du, J.; Wang, M.; Zhang, J.; Liu, C.*; Li, X.*
Front. Chem. 2021, 8, 591311.
[13] Yue, Q.; # Wang, K.; # Guan, M.; Zhao, Z.; Li, X.;* Yu, P.; Mao, L.* Angew. Chem. Int. Ed. 2022, 61, e202117.
[14] Wang, M.; Liu, Y.; Du, J.; Zhou, J.; Cao, L.; Li, X.*
Electroanalysis, 2022,34, 981–986
[15] Zhou, J.; # Zhang, J.; # Cao, L.; Liu, Y.; Liu, L.; Liu, C.*; Li, X.* Chem. Commun. 2023, 59, 3087-3090.
(Invited) Paper-Based SERS Quantitative Analysis for Cancer Diagnosis and Subtyping
Authors: Li Ming 
Published: February 2024

Paper-based biosensors are typically low-cost and user-friendly, which enable fast and easy detection of biomarkers of pathological significance for disease point-of-care diagnosis and therapeutic monitoring. Quantitative analysis of biomarkers in body fluids provides a good opportunity for early diagnosis, prompt treatment and longitudinal therapeutic surveillance of diseases such as cancer. Surface-enhanced Raman spectroscopy (SERS) is a powerful spectroscopic analytical technique capable of ultrasensitive and nondestructive analysis of biomarkers directly in biological samples with a multitude of advantages, including high sensitivity, molecular specificity, powerful multiplex detection capability, and excellent chemo/photostability. This talk will present our recent work on the development of paper-based SERS biosensing platforms for quantitative analysis of biomarkers. We have successfully innovated a series of paper-based SERS biosensing platforms, including (i) a freestanding SERS biosensor with excellent condensing enrichment capability for quantitative label-free detection of trace fentanyl in biofluids, (ii) a SERS-vertical flow biosensor for multiplexed quantitative profiling of exosomal proteins in clinical serum samples of patients, realizing noninvasive breast cancer subtyping and longitudinal treatment monitoring, and (iii) SERS-lateral flow biosensors for quantification of specific biomarkers (e.g., serum exosomes, proteins) of disease diagnosis and post-operative assessment. We demonstrate exceptional performances of these paper-based SERS biosensors for diverse biosensing applications. We believe that these paper-based SERS biosensors could be promising tools for point-of-care diagnosis in both clinical and field settings.

References:
(1) Xiaoming Su, Xinyu Liu, Yangcenzi Xie, Mingyang Chen, Chao Zheng, Hong Zhong,* Ming Li,* Integrated SERS-vertical flow biosensor enabling multiplexed quantitative profiling of serological exosomal proteins in patients for accurate breast cancer subtyping, ACS Nano
2023, 17(4), 4077–4088.
(2) Xiaoming Su, Xinyu Liu, Yangcenzi Xie, Mingyang Chen, Hong Zhong,* Ming Li,* Quantitative label-free SERS detection of trace fentanyl in biofluids with a freestanding hydrophobic plasmonic paper biosensor, Analytical Chemistry, 2023, 95(7), 3821-3829.
(3) Xiang Pan, Linhu Li, Hangduo Lin, Jiayi Tan, Haitao Wang, Mengling Liao, Caiju Chen, Beibei Shan, Yingfan Chen, Ming Li,* A graphene oxide-gold nanostar hybrid based-paper biosensor for label-free SERS detection of serum bilirubin for diagnosis of jaundice, Biosensors and Bioelectronics, 2019, 145, 111713.
Stretchable Electrodes for Medical Devices
Authors: Saini Matteo , Andreula Stefania , Taveggia Chiara , Groppi Chiara , Trezzi Marco , Spreafico Laura , Gussoni Luca 
Published: February 2024

[Key topics:

Electrodes

Electrodeposition techniques

Electrochemical properties

Structure – physical properties relationships]

The fabrication of electrodes on polymers, and especially on elastomers, is relevant in several fields. Among them, the medical field can benefit a lot from these kinds of electrodes. The human body uses electrical signaling in the muscles as well as in the nervous system to transfer energy and information between the brain and the rest of the body. Cardiac pacemakers, neuromodulation systems, neuromonitoring systems, brain machine interfaces are all examples where electrodes play a key role. Most of the body tissues are soft with unique shapes. When it is required to transfer electrical signals between the soft tissues and hard electronic systems, having soft and conformable interfaces might be particularly advantageous to increase the efficacy of the therapies, the energy consumption of the medical devices and the patient’s quality of life.
We have developed several solutions to obtain metal patterns on elastomers that are stretchable, strongly adhered and with high charge-storage capacity. The methods are based on SCBI (Supersonic Cluster Beam Implantation) that allows to form a nanocomposite made of metal nanoparticles embedded in the elastomer, which acts as seed where thin film electrodes are created either through physical vapor techniques or by electro or electroless deposition.
Here we compare electrodes made of Pt, Pt-Ir, Ir and IrOx obtained via electrochemical and physical vapor techniques. We present how, by tuning the process parameters, is possible to control the electrodes properties such as the charge-storage capacity, the corrosion under electrical stimulation and stability to tensile and compressive stresses. We show how the electrochemical and mechanical properties are correlated to the micro-structure, the grain morphology, and the stoichiometry. It is also shown how obtaining the electrodes with the right specific surface area is essential to guarantee stability against corrosion under high currents input.
Development of an Electrochemical Sensor for Histamine Detection, Based in the Formation of Complexes with Chelating Agents
Authors: Felix Navarro Cinthya Paola , Gallegos Tabanico Amed , Jimenez Canale Jorge , Santacruz Ortega Hisila , Sarabia Sainz Jose 
Published: February 2024

Histamine(β-imidazolylethylamine) (His) is a biogenic amine. It is an important mediator involved in
various physiological and pathological processes, including neurotransmission and numerous brain
functions, secretion of some hormones,regulation of gastrointestinal, circulatory functions, and
inflammatory reactions. However, a high level of histamine in the human body causes an allergy-like
syndrome called histamine intolerance or histamine poisoning (toxic level 50 mg per 100 g of
product). The source of elevated histamine level is due to fermented foods, processed meat, and
spoilage of the foodstuff, in particular seafood,due to uncontrolled microbial growth. Therefore,
monitoring of histamine is a critical task for the food industry and food safety. Also, electrochemical
sensors have received extensive attention researchers in the development of rapid His detection
methods due to their low cost, portability, higher sensitivity, and suitability for on-site screening. The
general objective of this work is to develop an electrochemical sensor for the detection of Histamine
based on the modification of gold screen printed electrodes using L-cysteine (L-Cys) as a quelant agent
for the capture of our analite of interest. To study each step of the modification on the electrode
surface, electrochemical techniques were used: Electrochemical Impedance Spectroscopy (EIS) with
a frequency of 50kHz and Cyclic Voltammetry(CV) with a window potential of -0.6 to 0.6 V and scan
rate of 0.5V/s . As partial conclusions, the modification of the electrode with L-cys/Cu(II) was
demonstrated by electrochemical methods. Thus, the developed sensor has the potential application
for Histamine detection