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1.
Marina Rosebrock Dániel Zámbó Pascal Rusch Denis Pluta Frank Steinbach Patrick Bessel Anja Schlosser Armin Feldhoff Karen D. J. Hindricks Peter Behrens Dirk Dorfs Nadja C. Bigall 《Advanced functional materials》2021,31(41):2101628
In this work, mixing and co-gelation of Au nanoparticles (NPs) and highly luminescent CdSe/CdS core/shell nanorods (NRs) are used as tools to obtain noble metal particle-decorated macroscopic semiconductor gel networks. The hybrid nature of the macrostructures facilitates the control over the optical properties: while the holes are trapped in the CdSe cores, the connected CdSe/CdS NRs support the mobility of excited electrons throughout the porous, hyperbranched gel networks. Due to the presence of Au NPs in the mixed gels, electron trapping in the gold NPs leads to a suppressed radiative recombination, namely, quenches the fluorescence in certain fragments of the multicomponent gel. The extent of fluorescence quenching can be influenced by the quantity of the noble metal domains. The optical properties are monitored as a function of the NR:NP ratio of a model system CdSe/CdS:Au. By this correlation, it demonstrates that the spatial extent of quenching initiated by a single Au NP exceeds the dimensions of one NR, which the Au is connected to (with a length of 45.8 nm ± 4.1 nm) and can reach the number of nine NRs per Au NP, which roughly corresponds to 400 nm of total electron travel distance within the network structure. 相似文献
2.
Shiyong Zhao Guangxu Chen Guangmin Zhou Li‐Chang Yin Jean‐Pierre Veder Bernt Johannessen Martin Saunders Shi‐Ze Yang Roland De Marco Chang Liu San Ping Jiang 《Advanced functional materials》2020,30(6)
Single‐atom catalysts (SACs) are attracting significant attention due to their exceptional catalytic performance and stability. However, the controllable, scalable, and efficient synthesis of SACs remains a significant challenge. Herein, a new and versatile seeding approach is reported to synthesize SACs supported on different 2D materials such as graphene, boron nitride (BN), and molybdenum disulfide (MoS2). This method is demonstrated on the synthesis of Ni, Co, Fe, Cu, Ag, Pd single atoms as well as binary atoms of Ni and Cu codoped on 2D support materials with the mass loading of single atoms in the range of 2.8–7.9 wt%. In particular, the applicability of the new seeding strategy in electrocatalysis is demonstrate on nickel SACs supported on graphene oxide (SANi‐GO), exhibiting excellent catalytic performance for electrochemical CO2 reduction reaction with a turnover frequency of 325.9 h?1 at a low overpotential of 0.63 V and high selectivity of 96.5% for CO production. The facile, controllable, and scalable nature of this approach in the synthesis of SACs is expected to open new research avenues for the practical applications of SACs. 相似文献
3.
Sensors: Pt Nanoparticles Sensitized Ordered Mesoporous WO3 Semiconductor: Gas Sensing Performance and Mechanism Study (Adv. Funct. Mater. 6/2018) 
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下载免费PDF全文 Junhao Ma Yuan Ren Xinran Zhou Liangliang Liu Yongheng Zhu Xiaowei Cheng Pengcheng Xu Xinxin Li Yonghui Deng Dongyuan Zhao 《Advanced functional materials》2018,28(6)
4.
Junhao Ma Yuan Ren Xinran Zhou Liangliang Liu Yongheng Zhu Xiaowei Cheng Pengcheng Xu Xinxin Li Yonghui Deng Dongyuan Zhao 《Advanced functional materials》2018,28(6)
In this study, a straightforward coassembly strategy is demonstrated to synthesize Pt sensitized mesoporous WO3 with crystalline framework through the simultaneous coassembly of amphiphilic poly(ethylene oxide)‐b‐polystyrene, hydrophobic platinum precursors, and hydrophilic tungsten precursors. The obtained WO3/Pt nanocomposites possess large pore size (≈13 nm), high surface area (128 m2 g?1), large pore volume (0.32 cm3 g?1), and Pt nanoparticles (≈4 nm) in situ homogeneously distributed in mesopores, and they exhibit excellent catalytic sensing response to CO of low concentration at low working temperature with good sensitivity, ultrashort response‐recovery time (16 s/1 s), and high selectivity. In‐depth study reveals that besides the contribution from the fast diffusion of gaseous molecules and rich interfaces in mesoporous WO3/Pt nanocomposites, the partially oxidized Pt nanoparticles that chemically and electronically sensitize the crystalline WO3 matrix, dramatically enhance the sensitivity and selectivity. 相似文献
5.
Rongjing Cui Chang Liu Jianming Shen Di Gao Jun‐Jie Zhu Hong‐Yuan Chen 《Advanced functional materials》2008,18(15):2197-2204
A rapid microwave‐hydrothermal method has been developed to prepare monodisperse colloidal carbon nanospheres from glucose solution, and gold nanoparticles (AuNPs) are successfully assembled on the surface of the colloidal carbon nanospheres by a self‐assembly approach. The resulting AuNP/colloidal carbon nanosphere hybrid material (AuNP/C) has been characterized and is expected to offer a promising template for biomolecule immobilization and biosensor fabrication because of its satisfactory chemical stability and the good biocompatibility of AuNPs. Herein, as an example, it is demonstrated that the as‐prepared AuNP/C hybrid material can be conjugated with horseradish peroxidase‐labeled antibody (HRP‐Ab2) to fabricate HRP‐Ab2‐AuNP/C bioconjugates, which can then be used as a label for the sensitive detection of protein. The amperometric immunosensor fabricated on a carbon nanotube‐modified glass carbon electrode was very effective for antibody immobilization. The approach provided a linear response range between 0.01 and 250 ng mL?1 with a detection limit of 5.6 pg mL?1. The developed assay method was versatile, offered enhanced performances, and could be easily extended to other protein detection as well as DNA analysis. 相似文献
6.
Sina Jamalzadegan Sooyoung Kim Noor Mohammad Harshita Koduri Zach Hetzler Giwon Lee Michael D. Dickey Qingshan Wei 《Advanced functional materials》2024,34(31):2308173
Biosensors are analytical tools for monitoring various parameters related to living organisms, such as humans and plants. Liquid metals (LMs) have emerged as a promising new material for biosensing applications in recent years. LMs have attractive physical and chemical properties such as deformability, high thermal and electrical conductivity, low volatility, and low viscosity. LM-based biosensors represent a new strategy in biosensing particularly for wearable and real-time sensing. While early demonstrations of LM biosensors focus on monitoring physical parameters such as strain, motion, and temperature, recent examples show LM can be an excellent sensing material for biochemical and biomolecular detection as well. In this review, the recent progress of LM-based biosensors for personalized healthcare and disease monitoring via both physical and biochemical signaling is survey. It is started with a brief introduction of the fundamentals of biosensors and LMs, followed by a discussion of different mechanisms by which LM can transduce biological or physiological signals. Next, it is reviewed example LM-based biosensors that have been used in real biological systems, ranging from real-time on-skin physiological monitoring to target-specific biochemical detection. Finally, the challenges and future directions of LM-integrated biosensor platforms is discussed. 相似文献
7.
Runshi Xiao Han Yu Mingwang Liu Wentao Xu Ying Qin Rong Tan Yuanxing Chen Jing Wen Xiang Peng Wenling Gu Chengzhou Zhu Liuyong Hu 《Advanced functional materials》2023,33(46):2304915
Non-fullerene acceptors (NFAs) are a crucial component of organic photovoltaics, and they have gained significant attention due to their outstanding photoelectric conversion efficiency. However, the recognition reactions of specific building blocks in NFAs are largely overlooked in the construction of photoelectrochemical (PEC) biosensing platforms. In this study, the potential of Y6, a prototype NFA, is explored to construct a sensitive PEC biosensor for monitoring urease activity due to the selective chemical reactivity of its organic building blocks. The resultant biosensor relies on the urease-mediated enzymatic reaction, which produces OH− anions that act as a nucleophilic reagent for the linkage of C═C in the Y6 moiety. This results in the formation of Y6-OH, which exhibits a depressive photoelectric response due to the destroyed conjugated structure and intramolecular charge transfer. As expected, a linear relationship is observed between the recession of photoelectric performance and the concentration of urease, with good sensitivity and selectivity. Furthermore, urease activity detection is also successfully realized in human saliva samples, suggesting the promising potential of NFA-based PEC biosensors for clinical applications even in the absence of common biological recognition units. 相似文献
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9.
Hainan Sun Xiaomin Xu Yufei Song Wei Zhou Zongping Shao 《Advanced functional materials》2021,31(16):2009779
Electrochemical water splitting is a critical energy conversion process for producing clean and sustainable hydrogen; this process relies on low-cost, highly active, and durable oxygen evolution reaction/hydrogen evolution reaction electrocatalysts. Metal cations (including transition metal and noble metal cations), particularly high-valence metal cations that show high catalytic activity and can serve as the main active sites in electrochemical processes, have received special attention for developing advanced electrocatalysts. In this review, heterogenous electrocatalyst design strategies based on high-valence metal sites are presented, and associated materials designed for water splitting are summarized. In the discussion, emphasis is given to high-valence metal sites combined with the modulation of the phase/electronic/defect structure and strategies of performance improvement. Specifically, the importance of using advanced in situ and operando techniques to track the real high-valence metal-based active sites during the electrochemical process is highlighted. Remaining challenges and future research directions are also proposed. It is expected that this comprehensive discussion of electrocatalysts containing high-valence metal sites can be instructive to further explore advanced electrocatalysts for water splitting and other energy-related reactions. 相似文献
10.
Yazhou Wang Anil Koklu Yizhou Zhong Tianrui Chang Keying Guo Chao Zhao Tania Cecilia Hidalgo Castillo Zhonggao Bu Chengyi Xiao Wan Yue Wei Ma Sahika Inal 《Advanced functional materials》2024,34(15):2304103
The organic electrochemical transistor (OECT) is one of the most versatile building blocks within the bioelectronics device toolbox. While p-type organic semiconductors have progressed as OECT channel materials, only a few n-type semiconductors have been reported, precluding the development of advanced sensor-integrated OECT-based complementary circuits. Herein, green aldol polymerization is uses to synthesize lactone-based n-type conjugated polymers. Fluorination of the lactone-based acceptor endows a fully locked backbone with a low-lying lowest unoccupied molecular orbital, facilitating efficient ionic-to-electronic charge coupling. The resulting polymer has a record-high n-type OECT performance with a high product of mobility and capacitance (µC* = 108 F cm−1 V−1 s−1), excellent mobility (0.912 cm2 V−1 s−1), low threshold voltage (0.02 V), and fast switching speed (τON, τOFF = 336 µs,108 µs). This work demonstrates two types of device architectures and applications enabled by the high performance of this n-type OECT, i.e., an artificial synapse and a complementary amplifier for detecting α-synuclein, a potential biomarker of Parkinson's disease. This study shows that materials that enable high gain and fast speed n-type OECTs can be developed via a green polymerization route, and the diverse form factors that these devices take promise for exploration of other application areas. 相似文献
11.
Jiasen Guo George Yumnam Ashutosh Dahal Yiyao Chen Valeria Lauter Deepak K. Singh 《Advanced Electronic Materials》2021,7(9):2100079
Geometrically frustrated materials, such as spin ice or kagome lattice, are known to exhibit exotic Hall effect phenomena due to spin chirality. For the first time, Hall effect mechanism is explored in an artificial honeycomb spin ice of Nd–Sn element using Hall probe and polarized neutron reflectivity measurements. In an interesting observation, a strong enhancement in Hall signal at relatively higher temperature of T ∼ 20 K is detected. The effect is attributed to the planar Hall effect due to magnetic moment configuration in spin ice state in low field application. In the antiferromagnetic state of neodymium at low temperature, applied field induced coupling between atomic Nd moments and conduction electrons in underlying lattice causes distinct increment in Hall resistivity at very modest field of H ∼ 0.015 T. The experimental findings suggest the development of a new research vista to study the planar and the field induced Hall effects in artificial spin ice. 相似文献
12.
Konstantinos Tsioris Graham E. Tilburey Amanda R. Murphy Peter Domachuk David L. Kaplan Fiorenzo G. Omenetto 《Advanced functional materials》2010,20(7):1083-1089
Silk protein from the silkworm Bombyx mori has excellent chemical and mechanical stability, biocompatibility, and optical properties. Additionally, when the protein is purified and reformed into materials, the biochemical functions of dopants entrained in the protein matrix are stabilized and retained. This unique combination of properties make silk a useful multifunctional material platform for the development of sensor devices. An approach to increase the functions of silk‐based devices through chemical modifications to demonstrate an active optofluidic device to sense pH is presented. Silk protein is chemically modified with 4‐aminobenzoic acid to add spectral‐color‐responsive pH sensitivity. The functionalized silk is combined with the elastomer poly(dimethyl siloxane) in a single microfluidic device. The microfluidic device allows spatial and temporal control of the delivery of analytic solutions to the system to provide the optical response of the optofluidic device. The modified silk is stable and spectrally responsive over a wide pH range from alkaline to acidic. 相似文献
13.
Xiao‐Fei Wang Yi Zhou Jing‐Juan Xu Hong‐Yuan Chen 《Advanced functional materials》2009,19(9):1444-1450
This work describes for the first time signal‐on electrochemiluminescence (ECL) enzyme biosensors based on cadmium sulfide nanocrystals (CdS NCs) formed in situ on the surface of multi‐walled carbon nanotubes (MWCNTs). The MWCNT–CdS can react with H2O2 to generate strong and stable ECL emission in neutral solution. Compared with pure CdS NCs, the MWCNT–CdS can enhance the ECL intensity by 5.3‐fold and move the onset ECL potential more positively for about 400 mV, which reduces H2O2 decomposition at the electrode surface and increases detection sensitivity of H2O2. Furthermore, the ECL intensity is less influenced by the presence of oxygen in solution. Benefiting from these properties, signal‐on enzyme‐based biosensors are fabricated by cross‐linking choline oxidase and/or acetylcholine esterase with glutaraldehyde on MWCNT–CdS modified electrodes for detection of choline and acetylcholine. The resulting ECL biosensors show wide linear ranges from 1.7 to 332 µM and 3.3 to 216 µM with lower detection limit of 0.8 and 1.7 µM for choline and acetylcholine, respectively. The common interferents such as ascorbic acid and uric acid in electrochemical enzyme‐based biosensors do not interfere with the ECL detection of choline and acetylcholine. Furthermore, both ECL biosensors possess satisfying reproducibility and acceptable stability. 相似文献
14.
15.
Sherif A. El‐Safty Deivasigamani Prabhakaran Yoshimichi Kiyozumi Fujio Mizukami 《Advanced functional materials》2008,18(12):1739-1750
The integration of actively‐functional receptors into nanoscale networks outperformed competent detection devices and other ion‐sensing designs. Synthesis of azo chromophores with long hydrophobic tails showed an ecofriendly sensing and an extreme selectivity for divalent mercury analytes. In order to tailor the tip to HgII ion‐sensing functionality, we manipulated the chromophores into nanoscale membrane discs, which led to small, easy‐to‐use optical sensor strips. The design of these hydrophobic probes into ordered pore‐based membranes transformed the ion‐sensing systems into smart, stable assemblies and portable laboratory assays. The nanosensor membrane strips with chemical and mechanical stability allowed for reversible, stable and reusable detectors without any structural damage, even under rigorous chemical treatment for several numbers of repeated cycles. The optical membrane strips provided HgII ion‐sensing recognition for both cost‐ and energy‐saving systems. Indeed, the synthetic strips proved to have an efficient ability for various analytical applications, targeting especially for on‐site and in situ chemical analyses, and for continuous monitoring of toxic HgII ions. On the proximity‐sensing front, these miniaturized nanomembrane strips can revolutionize the consumer and industrial market with the introduction of the probe surface‐mount naked‐eye ion‐sensor strips. 相似文献
16.
Lifeng Wang Mary C. Boyce Cheng‐Yen Wen Edwin L. Thomas 《Advanced functional materials》2009,19(9):1343-1350
Novel lightweight micro‐ and nanostructured materials are being used as constituents in hierarchically structured composites for providing high stiffness, high strength, and energy absorbing capability at low weight. Three dimensional SU‐8 periodic microframe materials with submicrometer elements exhibit unusual large plastic deformations. Here, the plastic dissipation and mechanical response of polymeric microframe structures is investigated using micromechanical modeling of large deformations. Finite element analysis shows that multiple deformation domains initiate, stabilize, and then spread plasticity through the structure; simulated deformation mechanisms and deformation progression are found to be in excellent agreement with experimental observation. Furthermore, the geometry can be used to tailor aspects of 3D behavior such as effective lateral contraction ratios (elastic and plastic) during tensile loading as well as negative normal stress during simple shear deformation. The effects of structural geometry on mechanical response are also studied to tailor and optimize mechanical performance at a given density. These quantitative investigations enable simulation‐based design of optimal lightweight material microstructures for dissipating energy. 相似文献
17.
Michael E. McConney Kyle D. Anderson Lawrence L. Brott Rajesh R. Naik Vladimir V. Tsukruk 《Advanced functional materials》2009,19(16):2527-2544
Bioinspired design is an engineering approach that involves working to understand the design principles and strategies employed by biology in order to benefit the development of engineered systems. From a materials perspective, biology offers an almost limitless source of novel approaches capable of arousing innovation in every aspect of materials, including fabrication, design, and functionality. Here, recent and ongoing work on the study of bioinspired materials for sensing applications is presented. Work presented includes the study of fish flow receptor structures and the subsequent development of similar structures to improve flow sensor performance. The study of spider air‐flow receptors and the development of a spider‐inspired flexible hair is also discussed. Lastly, the development of flexible membrane based infrared sensors, highly influenced by the fire beetle, is presented, where a pneumatic mechanism and a thermal‐expansion stress‐mediated buckling‐based mechanism are investigated. Other areas that are discussed include novel biological signal filtering mechanisms and reciprocal benefits offered through applying the biology lessons to engineered systems. 相似文献
18.
Bettina Tran Samuel Watts Jules D. P. Valentin Nadine Raßmann Georg Papastavrou Madeleine Ramstedt Stefan Salentinig 《Advanced functional materials》2024,34(37):2402257
Bacteriophages have a well-defined nanoscale size, shape, and surface chemistry, making them promising candidates for creating advanced biomaterials for applications including biocatalysis, drug delivery, and biosensing. This study demonstrates the self-assembly of the ≈29 nm diameter bacteriophage Qbeta (Qubevirus durum) with the synthetic polycation, poly [2-(methacryloyloxy)ethyl] trimethylammonium chloride (pMETAC), into compartmentalized colloidal crystals. The pH and the polymer chain length tune their self-assembly and the resulting structure, with the potential for further chemical modification or loading with bioactive molecules. Small angle X-ray scattering (SAXS), multi-angle dynamic light scattering (DLS), and atomic force microscopy (AFM) are used for studying the Qbeta self-assembly into the geometrically ordered aggregates. The suprastructures form at pH > 7.0 and disassemble at pH < 7.0. Zeta potential measurements and X-ray photoelectron spectroscopy (XPS) show pMETAC adsorption onto the negatively charged Qbeta surface. The colloidal crystal formation is achieved without chemically modifying the Qbeta surface. Additionally, the Qbeta/pMETAC suprastructures can be easily separated from the suspension as macroscopic aggregate, maintaining their activity. Their simple preparation allows for large-scale production of advanced materials in food and health science applications and nanotechnology. The insights from this study will further advance the tailored design and production of novel colloidal materials. 相似文献
19.
A simple technique to fabricate integrated crack‐free and crystalline nanostructured titania (ns‐titania) in microsystems devices is presented. In this technique, crack elimination is achieved by oxidizing Ti films, pre‐patterned below a threshold dimension, in aqueous hydrogen peroxide solution. Amorphous ns‐titania with walls of pores having thicknesses and pore diameters ranging from 25 nm–50 nm and 50 nm–200 nm, respectively, is formed after oxidation and transformed to anatase after thermal annealing. We demonstrate the functionality of ns‐titania formed and compatibility of this technique with microsystems device manufacturing practices by fabricating a prototype device for gas sensing using integrated ns‐titania features as sensing elements. 相似文献
20.
Shuilin Wu Zhengyang Weng Xiangmei Liu K.W. K. Yeung Paul. K. Chu 《Advanced functional materials》2014,24(35):5464-5481
As baby boomers age, diabetes mellitus, cancer, osteoarthritis, cardiovascular diseases, and orthopedic disorders are more widespread and the demand for better biomedical devices and functional biomaterials is increasing rapidly. Owing to the good biocompatibility, chemical stability, catalytic efficiency, plasticity, mechanical properties, as well as strength‐to‐weight ratio, titanium dioxide (TiO2) based nanostructured materials are playing important roles in tissue reconstruction and diagnosis of these diseases. Here, recent advance in the research of nanostructured TiO2 based biomaterials pertaining to bone tissue engineering, intravascular stents, drug delivery systems, and biosensors is described. 相似文献