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Sustainable Silk‐Derived Multimode Carbon Dots

Multifunctional carbon dots are synthesized using natural sericin proteins as the precursor in a household microwave oven. The carbon dots (CDs) show blue fluorescence in dispersed state, excitation-dependent fluorescence, and excitation-independent phosphorescence in aggregated state. The synthesis mechanism, luminescence properties, and potential...

Zero‐Dimensional Organic–Inorganic Hybrid Copper‐Based Halides with Highly Efficient Orange–Red Emission

This study presents three novel lead-free copper-based halide materials with zero-dimensional structures: ((R)-(+)-α-PEA)4Cu4I4, ((S)-(-)-α-PEA)4Cu4I4, and (β-PEA)4Cu4I4 (PEA=phenethylamine). These materials have a broad orange-red emission at ≈630 nm and a high photoluminescence quantum yield (the highest one is 73.6%), which are due to efficient self-trapped...

Ultrafast, High‐Contractile Electrothermal‐Driven Liquid Crystal Elastomer Fibers towards Artificial Muscles

An electrothermal-responsive liquid metal containing liquid crystal elastomer (LM-LCE) fiber is developed and generated high contraction over 40% with ultrafast contraction rate over 284% s−1 under pulsed voltage. By mimicking human triceps muscle, the fiber actuates an artificial arm to conduct precise ball shooting. It extends the functionality of...

Interface‐Dominated Topological Transport in Nanograined Bulk Bi2Te3

Three dimensional topological insulators are of great interest for technical applications owing to their protected surface carriers. This work characterizes chiral Dirac carriers using nanograined bulk materials. Compacted Bi2Te3 nanoparticles prove evidence of quantum interference transport on a bulk macroscopic sample. Time-domain Terahertz spectroscopy...

Spalling‐Induced Liftoff and Transfer of Electronic Films Using a van der Waals Release Layer

A versatile technique for exfoliating and transferring electronic films and devices is presented. A variety of films as well as complex high-performance devices can be transferred, paving the way for increased system performance and functionality. Film and device characterization reveal unique strain-related challenges and solutions. This technique...

Boron‐Mediated Grain Boundary Engineering Enables Simultaneous Improvement of Thermoelectric and Mechanical Properties in N‐Type Bi2Te3

A facile strategy of adding boron is proposed to induce the grain refinement but simultaneously suppress the donor-like effect in one-step sintered n-type Bi2Te3-based alloys, which results in grain-boundary strengthening and pinning effect for robust mechanical strength and optimization of carrier density and mobility for enhanced thermoelectric performance....

On‐Surface Synthesis of Variable Bandgap Nanoporous Graphene

Nanopores turn semi metallic graphene into semiconducting nanoporous graphene-2 or insulating nanoporous graphene-1. These two nanoporous graphenes with variable structures and band gaps are synthesized via surface-assisted reactions. Nanoporous graphene-1 with a twisted structure shows an insulating bandgap of 5.0 eV, and nanoporous graphene-2 has...

Catalase Nanocrystals Loaded with Methylene Blue as Oxygen Self‐Supplied, Imaging‐Guided Platform for Photodynamic Therapy of Hypoxic Tumors

Catalase nanocrystals (CatCry) are introduced as drug nanocarrier generating oxygen (O2) within hypoxic tumors. A prolonged CatCry catalytic activity enables the decomposition of intratumoral H2O2 for O2 supply, while their nanoporosity allows to soak CatCry with the photosensitizer (PS) methylene blue. Combination of the sustained O2 supply and increased...

NIR‐II Excitation Phototheranostic Nanomedicine for Fluorescence/Photoacoustic Tumor Imaging and Targeted Photothermal‐Photonic Thermodynamic Therapy

Novel second near infrared (NIR-II) light excitation phototheranostic nanomedicine was constructed by coencapsulating semiconducting polymer, heat shock protein (HSP) inhibitor, and azo compound into aptamer AS1411 modified liposomes. Such nanomedicine displays an encouraging therapeutic effect for tumor, benefiting from the NIR-II FI/PAI dual-modal...

Controllable Frontal Polymerization and Spontaneous Patterning Enabled by Phase‐Changing Particles

Herein, it is demonstrated that immersing phase-changing particles with heat absorption capabilities into the resin is a rational route to control the front trajectory, velocity, and temperature in frontal polymerization. The presence of the phase-changing particles can lead to significant and designable physical patterns with different microstructures...

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