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Plasmonic nanoparticles are commonly used as optical transducers in sensing applications. The optical signals resulting from the interaction of analytes and plamsonic nanoparticles are influenced by surrounding physical structures where the nanoparticles are located. This paper proposes inverse opal photonic crystal hydrogel as 3D structure to improve Raman signals from plasmonic staining. By hybridization...
The fabrication and properties of pH‐responsive colloidal particles are reported, which change shape rapidly (less than 200 ms), nearly independent of the diffusion of the pH altering species that trigger their actuation, and far more rapid than their Brownian motion. These particles are mechanically bistable, as revealed by their hysteretic shape response. Finite element analysis (FEA) shows that...
Visible light communication (VLC) simultaneously provides illumination and communication via light emitting diodes (LEDs). Keeping a low bit error rate is essential to communication quality, and holding a stable brightness level is pivotal for illumination function. For the first time, a piezo‐phototronic effect controlled visible light communication (PVLC) system based on InGaN/GaN multiquantum wells...
The fabrication of three‐dimensional metal structures has been a challenging task because of the need for multiple re‐alignment and lithography steps. On page 6013, this challenge is addressed by Z. J. Zheng and co‐workers, who report for the first time the use of 3D polymer brushes as an easy‐make resist to fabricate large‐area 3D gold structures in ambient conditions.
It is demonstrated that the orientation of striped patterns can be reversibly switched between two perpendicular in‐plane orientations upon exposure to electric fields. The results on thin films of symmetric polystyrene‐block‐poly(2‐vinyl pyridine) polymer in the intermediate segregation regime disclose two types of reorientation mechanisms from perpendicular to parallel relative to the electric field...
3D polymer brushes are reported for the first time as ideal resists for the alignment‐free nanofabrication of complex 3D metal structures with sub‐100 nm lateral resolution and sub‐10 nm vertical resolution. Since 3D polymer brushes can be serially fabricated in parallel, this method is effective to generate arbitrary 3D metal structures over a large area at a high throughput.
A one‐step method to produce ≈12 nm hydrodynamic diameter water‐soluble CdSe/ZnS quantum dots (QDs), as well as CdS/ZnS, ZnSe/ZnMnS/ZnS, AgInS2/ZnS, and CuInS2/ZnS QDs, by ligand exchange with a near‐monolayer of organosilane caps is reported. The method cross‐links the surface‐bound silane ligands such that the samples are stable on the order of months under ambient conditions. Furthermore, the samples...
Studies on the self‐assembly of nanoparticles have been a hot topic in nanotechnology for decades and still remain relevant for the present and future due to their tunable collective properties as well as their remarkable applications to a wide range of fields. The novel properties of nanoparticle assemblies arise from their internal interactions and assemblies with the desired architecture key to...
Glyco‐mimicking nanoparticles (glyco‐NPs) with Förster resonance energy transfer (FRET) donor and acceptor groups formed via dynamic covalent bond of benzoboroxole and sugar from two complementary polymers are prepared. The glyco‐NPs are proved to be quite stable under physiological conditions but sensitive to pH. So the glyco‐NPs can be internalized by dendritic cells with integrity and nontoxicity...
Recently discovered tunneling nanotubes (TNTs) are capable of creating intercellular communication pathways through which transport of proteins and other cytoplasmic components occurs. Intercellular transport is related to many diseases and nanotubes are potentially useful as drug‐delivery channels for cancer therapy. Here, we apply fluorescent nanodiamond (FND) as a photostable tracker, as well as...
Advances in the efficient manipulation of terahertz waves are crucial for the further development of terahertz technology, promising applications in many diverse areas, such as biotechnology and spectroscopy, to name just a few. Due to its exceptional electronic and optical properties, graphene is a good candidate for terahertz electro‐absorption modulators. However, graphene‐based modulators demonstrated...
Alloy anodes have shown great potential for next‐generation lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs). However, these applications are still limited by inherent huge volume changes and sluggish kinetics. To overcome such limitations, graphene‐protected 3D Sb‐based anodes grown on conductive substrate are designed and fabricated by a facile electrostatic‐assembling and subsequent...
The hybridization of plasmonic nanoparticles and inverse opal photonic crystal structures is demonstrated by Z. Mu, X. Zhao, Y. Huang, M. Lu, and Z. Gu on page 6036 through plasmonic staining of protein‐modified hydrogels. The SERS signal from the plasmonic‐stained inverse opal photonic crystal hydrogel is about five times those from nonporous hydrogels, by deliberately selecting excitation wavelengths...
Aqueous phase synthesis of small Au–Ag core–shell nanocubes, cuboctahedra, and octahedra is achieved through the deposition of Ag shells on small octahedral Au cores. These nanocrystals show efficient photothermal activity and can assemble into supercrystals.
Upconversion nanocrystals (UCNs) display near‐infrared (NIR)‐responsive photoluminescent properties for NIR imaging and drug delivery. The development of effective strategies for UCN integration with other complementary nanostructures for targeting and drug conjugation is highly desirable. This study reports on a core/shell‐based theranostic system designed by UCN integration with a folate (FA)‐conjugated...
Graphene‐protected 3D Sb‐based anodes are designed and fabricated by Y. Yu and co‐workers using a facile electrostatic assembly and confinement replacement method. On page 6026, in this fabrication, commercial nickel foam is used as both a 3D growth substrate and as a reductant for converting Sb3+ to Sb. When evaluated as binder‐free anodes for Li‐ion and sodium‐ion batteries, the obtained 3D electrodes...
Silicon‐based nanoparticles with unique “nanodandelion” structures are synthesized by a simple and efficient laser ablation method. Such material can be used as a stable anode for Li‐ion batteries with a high capacity of ≈1500 mAh g−1 and for more than 800 electrochemical cycles without obvious capacity decay.
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