Iron-Based Hollow Nanoplatforms for Cancer Imaging and Theranostics.

Over the past decade, iron (Fe)-based hollow nanoplatforms (Fe-HNPs) have attracted increasing attention for cancer theranostics, due to their high safety and superior diagnostic/therapeutic features. Specifically, Fe-involved components can serve as magnetic resonance imaging (MRI) contrast agents (CAs) and Fenton-like/photothermal/magnetic hyperthermia (MTH) therapy agents, while the cavities are able to load various small molecules (e.g.

Single pixel wide gamut dynamic color modulation based on a graphene micromechanical system.

Dynamic color modulation in the composite structure of a graphene microelectromechanical system (MEMS)-photonic crystal microcavity is investigated in this work. The designed photonic crystal microcavity has three resonant standing wave modes corresponding to the three primary colors of red (R), green (G) and blue (B), forming strong localization of light in three modes at different positions of the microcavity. Once graphene is added, it can govern the transmittance of three modes.

Research on the photoluminescence properties of Cu-doped perovskite CsPbCl quantum dots.

CsPbX (X = Cl, Br, and I) quantum dots (QDs) and Cu-doped CsPbCl QDs with different Cu-to-Pb molar ratios were synthesized a solvent-based thermal synthesis method. The photoluminescence (PL) properties of these Cu-doped CsPbCl QDs were also investigated in this study. The results showed that with the increase in the Cl concentration the surface defects of CsPb(Cl/Br) QDs increased, which resulted in an increase in the non-radiative recombination of excitons and weakened the PL intensity.

Triple-band black-phosphorus-based absorption using critical coupling.

Black phosphorus (BP) is an important two-dimensional material that plays a key role in new photoelectric devices. In this work, a triple-band BP-based absorber was proposed, in which a monolayer BP is coupled with the missing angle rectangular structure. Due to the critical coupling of the guided resonance, the BP absorber achieves a triple-band absorption.

Fast Polymerization of Polydopamine Based on Titanium Dioxide for High-Performance Flexible Electrodes.

Dopamine (DA) and its derivatives are promising for the fabrication of functional films and devices with excellent conductivity and long-term stability; nevertheless its polymerization process is typically prolonged. We have proposed the accelerated deposition process using ultraviolet (UV) irradiation with the existence of nanotitanium dioxide (nano-TiO) in order to realize the rapid and stable synthesis of polydopamine (PDA) films. The deposition process of nanostructured coatings such as platinum nanowire (PtNW) was also proposed by reducing the time of polymerization process to less than 1 h.

Outstanding comprehensive performance versus facile synthesis: Constructing core and shell-interchangeable nanocomposites as microwave absorber.

It is still a great challenge to develop high-performance microwave absorption materials (MAMs). Herein, we first proved the excellent synergistic effect of FeO/MoS heterostructure based on the theoretical calculations. To effectively utilize the synergistic effect and morphology, core and shell-interchangeable FeO@MoS and MoS@FeO nanocomposites (NCs) were elaborately constructed.

Enhanced and broadened fluorescence of ZnSe quantum dots enabled by the fluorescence energy transfer system of ZnSe quantum dots and gold nanoparticles.

The enhanced and broadened fluorescence of ZnSe quantum dots (QDs) were studied by using a fluorescence energy transfer system (FETS) of ZnSe QDs and gold nanoparticles (NPs). The FETS were prepared via uniformly dispersing the gold nanoparticles into ZnSe QD solution in the condition of magnetic stirring. Enhanced and broadened fluorescence was observed on the film of the FETS due to the transfer of photo-generated carriers between the ZnSe QDs and the gold NPs, instead of the surface plasma resonance effect.

Preparation of porous FeO nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties.

In this paper, α-FeO nanoparticles (NPs)-reduced graphene oxide (RGO), α-FeOOH nanorods (NRs)-RGO and porous α-FeO NRs-RGO could be selectively synthesized by hydrothermal method. The investigations indicated that the obtained α-FeO NPs, α-FeOOH NRs and porous α-FeO NRs were either attached on the surface of RGO sheets or coated uniformly by the RGO sheets. And the as-prepared nanohybrids exhibited excellent microwave absorption performance, which was proved to be ascribed to the quarter-wavelength matching model.

Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties.

By controlling the pyrolysis temperature, core/shell/shell structured Fe/FeC/carbon nanotube bundles (Fe/FeC/CNTBs), Fe/FeC/helical carbon nanotubes (Fe/FeC/HCNTs) and Fe/FeC/chain-like carbon nanospheres (Fe/FeC/CCNSs) with high encapsulation efficiency could be selectively synthesized in large-scale by water-assisted chemical vapor deposition method. Water vapor was proved to play an important role in the growth process. Because of α-Fe nanoparticles tightly wrapped by two layers, the obtained core/shell/shell structured nanohybrids showed high stabilities and good magnetic properties.

Enhancement effect of defect fluorescence of ZnSe quantum dots on a heterojuction of ZnSe quantum dots and gold nanoparticles.

We studied an enhancement effect of defect fluorescence of ZnSe quantum dots (QDs) on a heterojunction of ZnSe QDs and gold nanoparticles. The photoluminescence (PL) of Au/ZnSe heterojunction is excited by using a 150 nm diameter ultraviolet laser spot of a scanning near-field optical microscope. Owing to the charge transfer of photon-generated carriers from ZnSe QDs, the enhanced PL effect is observed, which results from the increase of the built-in electric field to hinder the electron transfer to gold nanoparticles and is trapped by the defect states of ZnSe QDs.

Enhanced photoluminescence of corrugated AlO film assisted by colloidal CdSe quantum dots.

We present the enhanced photoluminescence (PL) of a corrugated AlO film enabled by colloidal CdSe quantum dots. The colloidal CdSe quantum dots are fabricated directly on a corrugated AlO substrate using an electrochemical deposition (ECD) method in a microfluidic system. The photoluminescence is excited by using a 150 nm diameter ultraviolet laser spot of a scanning near-field optical microscope.

Structures, stabilities and spectral properties of borospherene B and metalloborospherenes MB (M = Li, Na, and K).

Density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations are carried out to study the stabilities, photoelectron, infrared, Raman and electronic absorption spectra of borospherene B and metalloborospherenes MB (M = Li, Na, and K). It is found that all atoms can form stable exohedral metalloborospherenes M&B, whereas only Na and K atoms can be stably encapsulated inside B cage. In addition, relative energies of these metalloborospherenes suggest that Na and K atoms favor exohedral configuration.

Heteronanostructured Co@carbon nanotubes-graphene ternary hybrids: synthesis, electromagnetic and excellent microwave absorption properties.

In order to explore high efficiency microwave absorption materials, heteronanostructured Co@carbon nanotubes-graphene (Co@CNTs-G) ternary hybrids were designed and produced through catalytic decomposition of acetylene at the designed temperature (400, 450, 500 and 550 °C) over CoO/reduced graphene oxide (CoO/RGO). By regulating the reaction temperatures, different CNT contents of Co@CNTs-G ternary hybrids could be synthesized. The investigations indicated that the as-prepared heteronanostructured Co@CNTs-G ternary hybrids exhibited excellent microwave absorption properties, and their electromagnetic and microwave absorption properties could be tuned by the CNT content.

Comparative study on the spectral properties of boron clusters Bn(0/-1)(n = 38-40).

The all-boron fullerenes B40(-1) and B39(-1) discovered in recent experiments are characterized and revealed using photoelectron spectroscopy. Except for the photoelectron spectroscopy, one may identify such boron clusters with other spectroscopic techniques, such as infrared spectra and Raman spectra. Insight into the spectral properties of boron clusters is important to understand the boron clusters and find their potential applications.

Formic acid catalyzed gas-phase reaction of H2O with SO3 and the reverse reaction: a theoretical study.

The formic acid catalyzed gas-phase reaction between H(2)O and SO(3) and its reverse reaction are respectively investigated by means of quantum chemical calculations at the CCSD(T)//B3LYP/cc-pv(T+d)z and CCSD(T)//MP2/aug-cc-pv(T+d)z levels of theory. Remarkably, the activation energy relative to the reactants for the reaction of H(2)O with SO(3) is lowered through formic acid catalysis from 15.97 kcal  mol(-1) to -15.