Functional Tailoring of Multi‐Dimensional Pure MXene Nanostructures for Significantly Accelerated Electromagnetic Wave Absorption

Small, Journal Year: 2023, Volume and Issue: 19(41)

Published: June 8, 2023

Transition metal carbide (Ti3 C2 Tx MXene), with a large specific surface area and abundant functional groups, is promising candidate in the family of electromagnetic wave (EMW) absorption. However, high conductivity MXene limits its EMW absorption ability, so it remains challenge to obtain outstanding attenuation ability pure MXene. Herein, by integrating HF etching, KOH shearing, high-temperature molten salt strategies, layered (L-MXene), network-like nanoribbons (N-MXene NRs), porous monolayer (P-MXene ML), layer L) are rationally constructed favorable microstructures states for HF, KOH, KCl/LiCl used functionalize tune microstructure state (F- , OH- Cl- terminals), thereby improving capacity MXene-based nanostructures. Impressively, unique structure, proper electrical conductivity, area, defects, nanostructures achieve good impedance matching, dipole polarization, conduction loss, thus inheriting excellent performance. Consequently, L-MXene, N-MXene NRs, P-MXene ML, L enable reflection loss (RL ) value -43.14, -63.01, -60.45, -56.50 dB matching thickness 0.95, 1.51, 3.83, 4.65 mm, respectively.

Language: Английский

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Machine‐Learning‐Assisted Nanozyme Design: Lessons from Materials and Engineered Enzymes

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(10)

Published: Jan. 26, 2023

Abstract Nanozymes are nanomaterials that exhibit enzyme‐like biomimicry. In combination with intrinsic characteristics of nanomaterials, nanozymes have broad applicability in materials science, chemical engineering, bioengineering, biochemistry, and disease theranostics. Recently, the heterogeneity published results has highlighted complexity diversity terms consistency catalytic capacity. Machine learning (ML) shows promising potential for discovering new materials, yet it remains challenging design based on ML approaches. Alternatively, is employed to promote optimization intelligent application engineered enzymes. Incorporation successful algorithms used enzymes can concomitantly facilitate guided development next‐generation desirable properties. Here, recent progress ML, its utilization enzymes, how emergent applications serve as strategies circumvent challenges associated time‐expensive laborious testing nanozyme research summarized. The examples ML‐aided also highlighted, special focus unified aims enhancing recapitulation substrate selectivity activity.

Language: Английский

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Lignocellulosic Biomass‐Based Carbon Dots: Synthesis Processes, Properties, and Applications

Small, Journal Year: 2023, Volume and Issue: 19(48)

Published: Aug. 3, 2023

Carbon dots (CDs), a new type of carbon-based fluorescent nanomaterial, have attracted widespread attention because their numerous excellent properties. Lignocellulosic biomass is the most abundant renewable natural resource and possesses broad potential to manufacture different composite smart materials. Numerous studies explored using components (such as cellulose, hemicellulose, lignin) in lignocellulosic produce CDs. There are few papers systemically aiming review state-of-the-art works related biomass-derived In this review, significant advances synthesis processes, formation mechanisms, structural characteristics, optical properties, applications biomass-based CDs such cellulose-based CDs, hemicellulose-based lignin-based latest research reviewed. addition, future directions on improvement technology raw materials enhance properties proposed. This will serve road map for scientists engaged exploring more science fields achieve highest material performance goals

Language: Английский

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Iron-Doped Polymer Dots with Enhanced Fluorescence and Dual Enzyme Activity for Versatile Bioassays

Analytical Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 7, 2024

Nanozymes with multiple functionalities endow biochemical sensing more sensitive and efficient analytical performance by widening the modes. Meanwhile, target-oriented design of multifunctional nanozymes for certain biosensing remains challenging. Herein, a constructive strategy doping iron into polymer dots (PDs) to achieve excellent oxidase-mimicking peroxidase-mimicking activity is proposed. Compared Fe-free PDs prepared under same mild condition, Fe-doped (Fe-PDs) exhibit greatly boosted fluorescence at 500 nm. While applying 3,3′,5,5′-tetramethylbenzidine (TMB) as chromogenic substrate, Fe-PDs can be further quenched oxTMB due inner filter effect (IFE). Inspired this, simple but colorimetric fluorometric dual-mode platform developed monitoring reducing substances ascorbic acid (AA), α-glucosidase (α-Glu), its inhibitors (AGIs). We believe that such enzyme-mimic materials will provoke exploration multimode strong practicality serve versatile tool in sensing.

Language: Английский

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Synthesis of 1D LaFeO3 nanofibers/2D MXene heterostructures for formaldehyde detection at low temperature

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 415, P. 136011 - 136011

Published: May 21, 2024

Language: Английский

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Graphene quantum dots as metal-free nanozymes for chemodynamic therapy of cancer

Matter, Journal Year: 2024, Volume and Issue: 7(3), P. 977 - 990

Published: Jan. 10, 2024

Language: Английский

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Bimetallic-MOF Tunable Conductive Hydrogels to Unleash High Stretchability and Sensitivity for Highly Responsive Flexible Sensors and Artificial Skin Applications

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(12), P. 7288 - 7300

Published: June 6, 2024

Metal–organic frameworks (MOFs) are widely applied in various fields, including energy storage, drug delivery, wastewater treatment, and much more. However, their use hydrogels is limited due to low dispersion which causes agglomeration the hydrogel network many properties of sacrifices. Similarly, conductive have emerged as a promising material for skin-like sensors excellent biocompatibility mechanical flexibility. like MOFs, also face challenges such stretchability, toughness, susceptibility fatigue, resulting sensing range large response time-reduced durability sensors. In this study, highly stretchable, tough, antifatigue composite poly(dodecyl methacrylate-acrylamide-2-(acryloyloxy)ethyl trimethylammonium chloride) bimetallic metal–organic framework [p(DA-AM-AETAC)BM-MOF] was developed by integrating BM-MOFs into it. To achieve uniform within network, positively charged surfactant, ethyl hexadecyl dimethylammonium bromide, used. It facilitates formation hydrophobic interactions between matrix surface BM-MOFs. Furthermore, it can interact with surfactant polymer chains through physical interactions, significantly enhancing hydrogel. The BM-MOF-based exhibited impressive stretchability (1588%) toughness (537 kJ m–3), along exceptional properties. Moreover, demonstrated high conductivity 1.3 S/m tensile strain sensitivity ranging from 0.5 700% gauge factor 14.8 at response–recovery 195–145 ms. p(DA-AM-AETAC)BM-MOF displayed sensitive, reliable, repetitive detection wide human activities, wrist elbow rotation, finger bending, swallowing motion, speaking, well handwriting drawing. monitor pressure mimic skin. This highlights potential wearable strain, pressure, artificial skin flexible devices.

Language: Английский

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Product Peroxidation Inhibition in Methane Photooxidation into Methanol

Advanced Science, Journal Year: 2024, Volume and Issue: 11(12)

Published: Jan. 17, 2024

Abstract Methane photooxidation into methanol offers a practical approach for the generation of high‐value chemicals and efficient storage solar energy. However, propensity C─H bonds in desired products to cleave more easily than those methane molecules results continuous dehydrogenation process, inevitably leading peroxidation. Consequently, inhibiting peroxidation is perceived as one most formidable challenges field direct conversion methanol. This review thorough overview typical mechanisms involved radical mechanism active site regulatory methods employed inhibit product photooxidation. Additionally, several perspectives on future research direction this crucial are proposed.

Language: Английский

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Honeysuckle‐Derived Carbon Dots With Robust Catalytic and Pharmacological Activities for Mitigating Lung Inflammation by Inhibition of Caspase11/GSDMD‐Dependent Pyroptosis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Abstract The catalytic activity of carbon dots (CDs) has generated significant interest regarding their potential applications within the biomedical field. However, structure‐activity relationship CDs and pharmacological mechanisms in disease treatment have yet to be comprehensively elucidated. In this study, two distinct types exhibiting superoxide dismutase (SOD)‐like enzymatic activities are synthesized through hydrothermal (Hy‐CDs) carbonization (Ca‐CDs) methods, utilizing Honeysuckle as common material precursor. Through comparative analysis, surface group modifications, theoretical calculations, it is determined that SOD‐like primarily originated from stabilizing influence amino on (•O 2 − ) intermediate its conjugation π‐system, facilitating electron transfer. vitro experiments demonstrated Hy‐CDs effectively alleviated cellular oxidative stress inhibited secretion pro‐inflammatory cytokines. Furthermore, bioactivity properties contribute pronounced therapeutic efficacy acute lung injury (ALI) ischemia/reperfusion (LIRI). Guided by transcriptomic analysis Western blotting, inhibit Caspase11/GSDMD‐dependent non‐classical pyroptosis down‐regulating GBP2 protein expression, thereby contributing inflammation. This study elucidates underlying biological applications.

Language: Английский

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Tuning the Excited-State Intramolecular Proton Transfer in Carbon Dots via Coordination with Metal Ion

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Although carbon dots (CDs) are widely used in the detection of heavy metal ions, rationally designing high-performance CDs for ion remains a significant challenge due to limited understanding their interaction mechanism. Here, we reveal excited-state intramolecular proton transfer (ESIPT) and provide an effective strategy switching ESIPT by coordinating with ions. This work demonstrates that Zn2+ has strong coordination capacity toward CDs, while Mn2+ mildest mode can effectively sense other Reasonable design unique responses ions is achieved doping or regulate process. Therefore, fluorescent sensor array sensitive identification 10 kinds real samples constructed, which shows consistent results ICP-OES. deepens fundamental fluorescence mechanism opens new avenues rational tuning emissive process, provides simple yet reliable platform nanoprobes as well molecules.

Language: Английский

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