Jasleen K. Bindra, Pragya R. Shrestha, Sebastian Engmann, Chad D. Cruz, David J. Gundlach, Emily G. Bittle, Jason P. Campbell
{"title":"Non-resonant phase sensitive approach for time resolved microwave conductivity in photoactive thin films","authors":"Jasleen K. Bindra, Pragya R. Shrestha, Sebastian Engmann, Chad D. Cruz, David J. Gundlach, Emily G. Bittle, Jason P. Campbell","doi":"10.1016/j.mtadv.2024.100471","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100471","url":null,"abstract":"Time-resolved microwave conductivity (TRMC) is a contactless technique utilized for the investigation of carrier density, transport properties, trapping phenomena, and recombination parameters in charge transport materials. Traditional TRMC methods rely on resonant cavities or resonators, which impose limitations on the frequency range and accuracy of measurements. In this study, we introduce an innovative approach that employs a non-resonant coplanar transmission line and a microwave interferometric detection scheme to investigate the phase-dependent complex microwave conductivity. Additionally, we demonstrate unique calibration techniques for determining the absolute complex microwave conductivity by combining transient photoconductivity (TPC) and electron spin resonance (ESR) as complementary methods. By utilizing a phase-sensitive microwave interferometer, our detection scheme significantly enhances measurement sensitivity and eliminates the need for a resonant cavity. This broadband detection system enables direct measurement of phase-dependent changes in film conductivity (Δσ). Moreover, it allows us to measure subtle variations in sample photoconductivity upon optical excitation and accommodates greatly restricted volumes (∼nL) consistent with typical device sizes. Here we demonstrate the utility of this technique on a series of poly(3-hexylthiophene) (P3HT) and the electron acceptor [6,6]-phenylC61-butyric acid methyl ester (PCBM) thin films with varying concentrations of PCBM and film thickness.","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"35 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139924991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design, synthesis, and progress of covalent organic frameworks (COFs)-based electrocatalysts for valorisation of biomass-derived platform chemicals","authors":"Changyu Weng, Hongmei Yuan, Lungang Chen, Xinghua Zhang, Qi Zhang, Longlong Ma, Jianguo Liu","doi":"10.1016/j.mtadv.2024.100473","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100473","url":null,"abstract":"The heavy reliance on fossil-based industries for basic chemicals not only contributes to severe global environmental problems but also hampers the sustainable development of the whole society. In addressing this issue, electrocatalysis utilizing biomass-derived platform chemicals provides a promising solution for the directed preparation of high-value chemicals. Among the various electrocatalysts, the remarkable appeal of COFs-based electrocatalysts has engendered great enthusiasm among researchers over the past decade due to the well-defined structure and large surface area of COFs. In this focused review, we highlight vital perspectives on the design, synthesis, and progress of COFs-based electrocatalysts in the electrocatalytic upgrading of biomass-derived platform chemicals. We provide a rational design of COFs-based electrocatalysts by incorporating metal species into the COFs frameworks and then regulate the local coordination environment and microstructure to facilitate efficient access to active centers, mass transportation, and electron transfer. This review offers a comprehensive understanding of the design principles underlying COFs-based electrocatalysts for platform molecules and its derivatives. Specifically, we thoroughly investigate the relationship between structure and performance, as well as synergistic effects within COFs-based electrocatalysts, aiming to shed light on the future design of next-generation electrocatalysts.","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"140 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139924990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ning Zhu, Yaping Zhuang, Wanju Sun, Juan Wang, Fan Wang, Xiaoyu Han, Zeyu Han, Ming Ni, Wenguo Cui, Yan Qiu
{"title":"Multistructured hydrogel promotes nerve regeneration","authors":"Ning Zhu, Yaping Zhuang, Wanju Sun, Juan Wang, Fan Wang, Xiaoyu Han, Zeyu Han, Ming Ni, Wenguo Cui, Yan Qiu","doi":"10.1016/j.mtadv.2024.100465","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100465","url":null,"abstract":"Hydrogels have emerged as promising biomaterials for nerve regeneration due to their adjustable properties, structural resemblance to the extracellular matrix, and ability to promote cell adhesion and proliferation. This comprehensive review discusses the advantages, challenges, and future directions of various functional hydrogels. Advanced technologies for fabricating Multistructured hydrogel, including injectable hydrogels, hydrogel microspheres, fibrous hydrogels, 3D printing hydrogels, nanogels, stem cell-loaded hydrogels, electrical hydrogels, ultrasound hydrogels, and magnetic hydrogels, have been developed and studied for nerve regeneration. These technologies demonstrate the versatility of hydrogels in neural tissue repair. However, challenges such as biocompatibility, degradation rates, and scaffold design need to be addressed. Interdisciplinary research is necessary to develop innovative hydrogel systems that overcome these challenges and realize the potential of hydrogels for nerve regeneration. This review provides valuable insights into advanced hydrogel technologies and highlights their potential in regenerative medicine, particularly in neural regeneration. Researchers can use this knowledge to refine therapeutic approaches involving hydrogels for enhancing nerve regeneration.","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"35 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139925194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hyunsub Shin, Sujeong Kim, Jaehun Lee, Harim Jeong, Sang Woo Joo, Chul-Tae Lee, Sun-Min Park, Misook Kang
{"title":"Dual functionality for hydrogen production and antibacterial activity in Zn-deficient Cu0.1Zn0.9O photocatalyst loaded with Ag nanoparticles of various sizes","authors":"Hyunsub Shin, Sujeong Kim, Jaehun Lee, Harim Jeong, Sang Woo Joo, Chul-Tae Lee, Sun-Min Park, Misook Kang","doi":"10.1016/j.mtadv.2024.100469","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100469","url":null,"abstract":"This study aims to find an eco-friendly dual material to apply toward energy and antibacterial industry, and to identify their active sites. CuZnO nanoparticles (NPs) containing 10 % Cu ions into ZnO framework are synthesized using a facile hydrothermal method, and 10, 20, 30, or 40 nm-sized Ag NPs are loaded to obtain Ag@CuZnO particles. From the time-dependent increase in photocurrent density, it is confirmed that the Ag NPs has a photoelectron harvesting ability. Unlike ZnO and CuZnO, the Ag@CuZnO catalyst well splits water to generate hydrogen. Particularly, the catalyst loaded with 30 nm Ag NPs achieves the highest hydrogen production efficiency of 424.54 μmolg. This proves that the active sites generating hydrogen during water splitting are the Ag NP surfaces grafted onto the conduction band of the CuZnO particles. Contrastingly, antibacterial performances against are expressed in all samples of ZnO, CuZnO, and Ag@CuZnO. The antibacterial performance for the Ag NP-loaded sample slightly increases but it is not significant, indicating that the active site exhibiting the antibacterial activity is the hole of the valence band of CuZnO. In the end, this study revealed that the advantageous photocatalytic activity does not always express effective antibacterial activity because the active sites exhibiting photocatalytic and antibacterial properties may not be the same.","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"139 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139924993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Surface modification of electrospun nitrogen-doped Ge@C fiber with highly porous NiCo2O4 layer as high-performance lithium-ion battery anode","authors":"Ariono Verdianto, Heechul Jung, Sang-Ok Kim","doi":"10.1016/j.mtadv.2024.100472","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100472","url":null,"abstract":"<p>Elemental germanium (Ge) is considered a high-capacity anode material for lithium-ion batteries (LIBs). However, it suffers from severe capacity degradation and inherent material instability owing to inevitable volumetric changes during the alloying/dealloying reactions with lithium. In this study, we report a hierarchical architecture comprising Ge nanoparticles in electrospun carbon fibers (Ge@C) coated with an <em>in situ</em> grown NiCo<sub>2</sub>O<sub>4</sub> (NCO) layer to enhance the structural stability and electrochemical reversibility of Ge. The Ge@C@NCO fibers possess unique features, including well-dispersed Ge in nitrogen-doped porous carbon network that serves as a conductive volumetric buffer. This configuration allows for effective volume accommodation and improved electronic conductivity. Moreover, the porous NCO contributed to enhanced reversible capacity and rapid ionic transfer during electrochemical reactions. As a result, the Ge@C@NCO anode exhibited an ultrahigh specific capacity of 981.7 mAh g<sup>−1</sup> and excellent capacity retention over 200 cycles under a current density of 1 A g<sup>−1</sup>, indicating superior lithium storage properties compared to pure Ge. Additionally, it retained approximately 80 % of initial capacity after 300 cycles even at 5 A g<sup>−1</sup>, demonstrating fast charging capability. The outstanding performance of this hierarchical structure presents a new path for designing alloying-based anodes for high-energy-density LIBs.</p>","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"78 1 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139752929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Additive manufacturing of biomimetic lightweight silicon oxycarbide ceramics with high mechanical strength and low thermal conductivity","authors":"Zhuoqing Zhang, Jinghan Li, Yu Shi, Xiaokun Gu, Shaogang Wang, Rui Yang, Lei Cao, Xing Zhang","doi":"10.1016/j.mtadv.2024.100466","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100466","url":null,"abstract":"<p>Thermal insulation is crucially important to the safety and reusability of aerospace vehicles. Fabrication of thermal insulation materials with light weight, high mechanical strength and low thermal conductivity remains challenging. In this study, porous polymer derived silicon oxycarbide (SiOC) ceramics with hierarchical structures mimicking cuttlebones were prepared through stereolithography additive manufacturing followed by pyrolysis. The compressive strength of SiOC ceramics with ridges (“R” structures) alongside the sinusoidal walls (“S” structures) (RS-SiOC, 13.37 ± 0.86 MPa for 7-RS-SiOC) mimicking those of cuttlebone was much higher than that of SiOC ceramics with just sinusoidal walls (S–SiOC, 8.43 ± 0.81 MPa), while the density of RS-SiOC with 7 ridges (7-RS-SiOC) and S–SiOC were 0.40 g/cm<sup>3</sup> and 0.39 g/cm<sup>3</sup>, respectively. Our results revealed that the tailored “S” and “R” structures of biomimetic 7-RS-SiOC ceramics, together with the amorphous network of SiOC assembled in the layer-by-layer manner, rendered the high mechanical strength. In addition, the 7-RS-SiOC sample exhibited a low thermal conductivity of 0.12 W/(m·K) at room temperature. The back temperature of the 7-RS-SiOC sample was 179.5 °C when exposed to 800 °C for 1200 s, showing excellent thermal insulation capability. The state-of-the-art biomimetic design of lightweight SiOC ceramics likely offers a solution to high-performance thermal insulation for aerospace vehicles.</p>","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"64 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139752928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michael Pedowitz, Daniel Lewis, Jennifer DeMell, Daniel J. Pennachio, Jenifer R. Hajzus, Rachael Myers-Ward, Soaram Kim, Kevin M. Daniels
{"title":"Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates","authors":"Michael Pedowitz, Daniel Lewis, Jennifer DeMell, Daniel J. Pennachio, Jenifer R. Hajzus, Rachael Myers-Ward, Soaram Kim, Kevin M. Daniels","doi":"10.1016/j.mtadv.2024.100467","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100467","url":null,"abstract":"<p>Nanostructured manganese oxides (MnO<sub>x</sub>) have shown incredible promise in constructing next-generation energy storage and catalytic systems. However, it has proven challenging to integrate with other low-dimensional materials due to harsh deposition conditions and poor structural stability. Here, we report the deposition of layered manganese dioxide (δ-MnO<sub>2</sub>) on bilayer epitaxial graphene (QEG) using a simple three-step electrochemical process involving no harsh chemicals. Using this process we can synthesize a 50 nm thick H–MnO<sub>2</sub> film in 1.25s. This synthetic birnessite is inherently water-stabilized, the first reported in the literature. We also confirm that this process does not cause structural damage to the QEG, as evidenced by the lack of D peak formation. This QEG heterostructure enhanced MnO<sub>2</sub>'s redox active gas sensing, enabling room temperature detection of NH<sub>3</sub> and NO<sub>2</sub>. We also report on transforming this δ-MnO<sub>2</sub> to other MnO<sub>x</sub> compounds, Mn<sub>2</sub>O<sub>3</sub> and Mn<sub>3</sub>O<sub>4</sub>, via mild annealing. This is confirmed by Raman spectroscopy of the films, which also confirms limited damage to the QEG substrate. To our knowledge, this is the first synthesis of Mn<sub>2</sub>O<sub>3</sub> and Mn<sub>3</sub>O<sub>4</sub> on pristine graphene substrates. Both methods demonstrate the potential of depositing and transforming multifunctional oxides on single-crystal graphene using QEG substrates, allowing for the formation of nanostructured heterostructures previously unseen. Additionally, the electrochemical nature of the deposition presents the ability to scale the process to the QEG wafer and adjust the solution to produce other powerful multifunctional oxides.</p>","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"59 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139584169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anandapadmanabhan A. Rajendran, Keying Guo, Alberto Alvarez-Fernandez, Thomas R. Gengenbach, Marina B. Velasco, Maximiliano J. Fornerod, Kandeel Shafique, Máté Füredi, Pilar Formentín, Hedieh Haji-Hashemi, Stefan Guldin, Nicolas H. Voelcker, Xavier Cetó, Beatriz Prieto-Simón
{"title":"A new class of porous silicon electrochemical transducers built from pyrolyzed polyfurfuryl alcohol","authors":"Anandapadmanabhan A. Rajendran, Keying Guo, Alberto Alvarez-Fernandez, Thomas R. Gengenbach, Marina B. Velasco, Maximiliano J. Fornerod, Kandeel Shafique, Máté Füredi, Pilar Formentín, Hedieh Haji-Hashemi, Stefan Guldin, Nicolas H. Voelcker, Xavier Cetó, Beatriz Prieto-Simón","doi":"10.1016/j.mtadv.2024.100464","DOIUrl":"https://doi.org/10.1016/j.mtadv.2024.100464","url":null,"abstract":"<p>Carbon-based nanomaterials are key to developing high-performing electrochemical sensors with improved sensitivity and selectivity. Nonetheless, limitations in their fabrication and integration into devices often constrain their practical applications. Moreover, carbon nanomaterials-based electrochemical devices still face problems such as large background currents, poor stability, and slow kinetics. To advance towards a new class of carbon nanostructured electrochemical transducers, we propose the in-situ polymerization and carbonization of furfuryl alcohol (FA) on porous silicon (pSi) to produce a tailored and highly stable transducer. The thin layer of polyfurfuryl alcohol (PFA) that conformally coats the pSi scaffold transforms into nanoporous carbon when subjected to pyrolysis above 600 °C. The morphological and chemical properties of PFA-pSi were characterized by scanning electron microscopy, and Raman and X-ray photoelectron spectroscopies. Their stability and electrochemical performance were investigated by cyclic voltammetry and electrochemical impedance spectroscopy in [Fe(CN)<sub>6</sub>]<sup>3-/4-</sup>, [Ru(NH<sub>3</sub>)<sub>6</sub>]<sup>2+/3+</sup>, and hydroquinone. PFA-pSi showed superior electrochemical performance compared to screen-printed carbon electrodes while also surpassing glassy carbon electrodes in specific aspects. Besides, PFA-pSi has the additional advantage of easy tuning of the electroactive surface area. To prove its potential for biosensing purposes, a DNA sensor based on quantifying the partial pore blockage of the pSi upon target hybridization was built on PFA-pSi. The sensor showed a limit of detection of 1.4 pM, outperforming other sensors based on the same sensing mechanism.</p>","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"8 7 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139461569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yushu Wang, Bin Wang, Kao Li, Maosheng Wang, Haihua Xiao
{"title":"Corrigendum to “Engineered metal and their complexes for nanomedicine-elicited cancer immunotherapy” [Mater. Today Adv., Engineered metal and their complexes for nanomedicine-elicited cancer immunotherapy, 15, (2022), 100276]","authors":"Yushu Wang, Bin Wang, Kao Li, Maosheng Wang, Haihua Xiao","doi":"10.1016/j.mtadv.2023.100457","DOIUrl":"https://doi.org/10.1016/j.mtadv.2023.100457","url":null,"abstract":"Abstract not available","PeriodicalId":48495,"journal":{"name":"Materials Today Advances","volume":"79 1","pages":""},"PeriodicalIF":10.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139093755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}