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An ingenious strategy is put forward to evaluate accurately the thermoelectric performance of carbon nanotube (CNT) thin films, including thermal conductivity, electrical conductivity, and Seebeck coefficient in the same direction. The results reveal that the as‐prepared CNT interconnected films and CNT fibers possess enormous potential of thermoelectric applications because of their ultrahigh power...
Improving volumetric energy density is one of the major challenges in nanostructured carbon electrodes for electrochemical energy storage device applications. Herein, a simple hydrothermal oxidation process of single‐walled carbon nanotube (SWNT) networks in dilute nitric acid is reported, enabling simultaneous physical densification and chemical functionalization of the as‐assembled randomly‐packed...
Thermoelectric detection of a multi‐subband density of states in semiconducting and metallic single‐walled carbon nanotubes is demonstrated by scanning the Fermi energy from electron‐doped to hole‐doped regions. The Fermi energy is systematically controlled by utilizing the strong electric field induced in electric‐double‐layer transistor configurations, resulting in the optimization of the thermoelectric...
Visible‐near infrared photodetectors are reported with excellent overall device parameters from conjugated polymers with different optical bandgaps by optimal design in device structure and optimizing the thickness of the photoactive layer in nanoscale. The best visible‐near infrared photodetectors show high detectivity (D*) of 1.7 × 1013 Jones at a wavelength of 710 nm, which is among one of the...
An ultimate integration strategy making use of material and geometry is applied in a proof‐of‐concept study. Integrated supercapacitor‐sensor systems with the capability of photodetecting and strain sensing are fabricated based on multifunctional conducting polypyrrole and piezoresistive textile geometry, respectively. This integration strategy enables promising applications for self‐powered smart...
A high‐capacity electrode active material with macrocyclic nanochannels is developed for a negative electrode of lithium batteries. With appropriate design of the molecular and crystal structures, a ubiquitous chemical commonly available in reagent stocks of any chemistry laboratories, naphthalene, was transformed into a high‐performance electrode material for all‐solid‐state lithium batteries.
A new biomimetic surface named nano‐micro binary polymer brushes is fabricated by large‐area bench‐top dip‐pen nanodisplacement lithography technique. It is composed of gelatin‐modified poly(glycidyl methacrylate) nanolines which are spaced by microstripes of poly(N‐isopropylacrylamide). Cells are not only adhered and oriented well on the re‐used surface, but also detachable from the surface with...
Hematite suffers from poor charge transport and separation properties for solar water splitting. This paper describes the design and fabrication of a 3D Fe2O3/Fe2TiO5 heterojunction photoanode with improved charge separation, via a facile hydrothermal method followed by atomic layer deposition and air annealing. A highly crystallized Fe2TiO5 phase forms with a distinct interface with the underlying...
Seed‐mediated syntheses utilizing facet‐selective surface passivation provide the necessary chemical controls to direct noble metal nanostructure formation to a predetermined geometry. The foremost protocol for the synthesis of (111)‐faceted Ag octahedra involves the reduction of metal ions onto pre‐existing seeds in the presence of citrate and ascorbic acid. It is generally accepted that the capping...
Stimuli‐responsive carriers releasing multiple drugs have been researched for synergistic combinatorial cancer treatment with reduced side‐effects. However, previously used drug carriers have limitations in encapsulating multiple drug components in a single carrier and releasing each drug independently. In this work, pH‐sensitive, multimodulated, anisotropic drug carrier particles are synthesized...
The production of structural colors based on graphene oxide (GO) pseudo‐one‐dimensional photonic crystals (p1D‐PhCs) in the visible spectrum is reported on page 3433 by W. Qi and co‐workers. The structural colors could be tuned by simply changing either the volume or concentration of the aqueous GO dispersion. Moreover, GO p1D‐PhCs exhibit visible and rapid responsiveness to humidity.
On page 3344, X.‐Z. Zhang and co‐workers present how versatile bioactive peptides could be constructed to possess multiple capabilities. Mesoporous silica nanoparticles modified with peptides could realize many types of functionalities, including site‐specific targeting, fluorescence imaging, and intracellular diagnosis, especially the controlled release of a drug or gene for tumor treatment.
On page 3381, S. Sato, S. Orimo, H. Isobe, and co‐workers present the first macrocyclic material to be utilized in negative electrodes of all‐solid‐state, rechargeable lithium batteries. Assembled to align the molecular openings, the macrocycle paves paths for lithium to migrate to the π‐stack intercalation sites for the storage. The macrocyclic nanochannel of a nanometer‐scale diameter further provides...
A vertical confocal observation system capable of high‐resolution observation of intracellular structure is demonstrated. The system consists of magnet‐active microplates to rotate, incline, and translate single adherent cells in the applied magnetic field. Appended to conventional confocal microscopes, this system enables high‐resolution cross‐sectional imaging with single‐molecule sensitivity in...
Plasmonic substrates have fixed sensitivity once the geometry of the structure is defined. In order to improve the sensitivity, significant research effort has been focused on designing new plasmonic structures, which involves high fabrication costs; however, a method is reported for improving sensitivity not by redesigning the structure but by simply assembling plasmonic nanoparticles (NPs) near...
Ultra‐lightweight resistive switching memory based on protein has been demonstrated. The memory foil is 0.4 mg cm−2, which is 320‐fold lighter than silicon substrate, 20‐fold lighter than office paper and can be sustained by a human hair. Additionally, high resistance OFF/ON ratio of 105, retention time of 104 s, and excellent flexibility (bending radius of 800 μm) have been achieved.
It is broadly observed that graphene oxide (GO) films appear transparent with a thickness of about several nanometers, whereas they appear dark brown or almost black with thickness of more than 1 μm. The basic color mechanism of GO film on a sub‐micrometer scale, however, is not well understood. This study reports on GO pseudo‐1D photonic crystals (p1D‐PhCs) exhibiting tunable structural colors in...
During the last decade, using versatile, promising, and fascinating mesoporous silica nanoparticles (MSNs) as site‐specific and stimuli‐responsive drug delivery systems (DDSs) has received concentrated research interest. As one of the most attractive surface modification units, peptides have inherent bioactivity, biodegradability and biocompatibility. Recent progresses in the utilization of versatile...
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