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Piezoelectric Nanogenerators: Polarization‐ and Electrode‐Optimized Polyvinylidene Fluoride Films for Harsh Environmental Piezoelectric Nanogenerator Applications (Small 14/2021)

In article number 2007289, Jong Hoon Jung, and co‐workers report a highly stable power source application of piezoelectric nanogenerator in the harsh environmental conditions of cryogenic temperatures, low pressures, large temperature/pressure fluctuations, and strong ultraviolet. The polarization‐ and electrode‐optimized ferroelectric polymer‐based...

Planar and Transparent Memristive Devices Based on Titanium Oxide Coated Silver Nanowire Networks with Tunable Switching Voltage

The authors demonstrate a transparent resistive switching devices entirely fabricated by open‐air approaches, without a deposition chamber. The threshold voltage can be tuned by adjusting the density of AgNWs, while maintaining a high LRS/HRS ratio. They show the effect of oxide thickness on the threshold‐switching phenomenon, thus shedding light on...

Therapeutic Gene Silencing Using Targeted Lipid Nanoparticles in Metastatic Ovarian Cancer

Lipid nanoparticles encapsulating small interfering ribonucleic acids are developed that block two essential pathways for cancer cell survival. Targeting of metastasized ovarian cancer cells is further enhanced by coating nanoparticles with hyaluronan. Robust gene silencing in key tissues involved in ovarian cancer pathophysiology in an advanced ovarian...

The Functional Chameleon of Materials Chemistry—Combining Carbon Structures into All‐Carbon Hybrid Nanomaterials with Intrinsic Porosity to Overcome the “Functionality‐Conductivity‐Dilemma” in Electrochemical Energy Storage and Electrocatalysis

Porous all‐carbon hybrid nanomaterials combining an electrically conductive domain and a highly functional carbon can be used to overcome the “functionality‐conductivity‐dilemma” that remains a huge drawback for single compounds. Such materials show extraordinary performance for many electrochemical applications such as energy storage and electrocatalysis,...

A Versatile Competitive Coordination Strategy for Tailoring Bioactive Zeolitic Imidazolate Framework Composites

A facile competitive coordination strategy enables step‐by‐step evolution of amorphous gel to crystalline MOFs, which serves as an ideal platform for enzyme encapsulation in aqueous solution. The gradient changing chemistry including hierarchical porous structure and hydrophilicity endows the resultant bioactive MOFs composites with tailored catalytic...

1D Mixed‐Stack Cocrystals Based on Perylene Diimide toward Ambipolar Charge Transport

Four 1D mixed‐stack cocrystals using perylene diimide as the acceptor are achieved with tunable charge transporting behaviors from n‐type to ambipolarity. The in‐depth investigation of the relationship among molecular structures, packing arrangements, and charge transport properties can shed light on the design of 1D mixed‐stack cocrystals with excellent...

Artificial Neuron and Synapse Devices Based on 2D Materials

The recent progress on 2D material‐based neuromorphic devices is reviewed. Artificial neuromorphic devices, including synapse and neuron devices, have been classified according to their working principles. The unique properties of 2D materials make it possible to emulate biological neural components, enabling neuromorphic devices that emulate advanced...

A Self‐Ordered Nanostructured Transparent Electrode of High Structural Quality and Corresponding Functional Performance

Highly ordered nanoporous transparent electrodes fabricated via nanosphere lithography and anodization is presented. Perfect hexagonal order over domains of thousands of square micrometer is acheived using self‐assembly methods exclusively. Solar cells made from them reach significantly improve performance compared to their disordered counterparts....

Suspended MoS2 Photodetector Using Patterned Sapphire Substrate

Patterned sapphire substrates (PSS) are proposed to improve the optoelectronic properties of 2D layered materials. An enhanced dynamic distribution of local electric field and concentrated photon excitons across MoS2/PSS interface are revealed by the finite‐difference time‐domain simulation. This work provides a guide for fabricating advanced MoS2‐based...

A Transparent Nanopatterned Chemiresistor: Visible‐Light Plasmonic Sensor for Trace‐Level NO2 Detection at Room Temperature

Transparent and visible light‐activated NO2 sensor that can operate at room temperature is presented. The pattern of Au–SnO2 nanofibers with extremely low coverage fabricated by direct‐write near‐field electrospinning exhibits high transparency (≈93%), ultrahigh response to NO2, and reversible sensing behaviors under visible light or natural sunlight,...

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