Porous metal-organic frameworks (MOF) with fluorescent properties provide a unique platform for the adsorptive removal and sensing harmful chemicals. Herein, the fluorescent sensing of nitro-aromatic explosives was demonstrated by the turn-off of MOF's fluorescent. MOFs' porous properties also allow highly selective dye adsorption towards small cationic dyes (methylene blue). More details are available in the article by Kim et al.

Operando small-angle x-ray scattering (SAXS) for battery research is briefly reviewed, to help in understanding the complex behaviors of nano-scaled electrochemical components such as electrodes and electrolytes in secondary batteries, where this advanced analysis method is expected to play a key role in providing useful information for the design and synthesis of prospective materials in energy-storage fields.

The “Water-in-salt” electrolyte (WiSE) is a promising class of electrolyte because of its unique physicochemical properties. This review highlights the recent progress of WiSE and its application to supercapacitors (SCs). Our discussion is primarily focued on operatig mechanisms of non-Lithium based WiSE and how they affect performance. Current challenges and perspectives are also discussed.

We synthesized indium phosphide (InP) tetrapod NCs with the addition of ZnCl₂ and shelling with ZnSe. Consequently, photoluminescence was dramatically enhanced with tetrapodal geometry. Interestingly, we observed suppression of growing arm length and narrower arm length distribution in InP tetrapods with the addition of ZnCl₂. This study offers a great platform to study the role of ZnCl₂ and exciton behavior in tetrapod NCs.

The degradation process of Pt/C was studied using identical-location transmission electron microscopy at multiple-length scales. Various morphological changes in individual Pt nanoparticles were quantitatively analyzed. The formation of Pt single atoms on the carbon support was observed and its effect on the oxygen reduction reaction pathway was studied using rotating ring-disk electrode tests.

This review provides recent progress on novel methods to prepare electrodes and gate dielectrics for 2D material field-effect transistors.

The stilbene ligand-based metal–organic frameworks (MOFs) were used for dye adsorption and nitrobenzene sensing. Despite the low adsorption capacity, the MOFs showed unique selectivity in dye adsorption. In addition, the MOFs also show fluorescence-based sensing ability toward organic analytes. Depending on the structure of MOFs, the MOF shows different selectivity and sensitivity as a sensor.

Herein, a novel AIE-active fluorophore (NI-DB) with electron donor-π bridge-electron acceptor (D-π-A) structure based on the 1,8-naphthalimide was developed. Significantly, after fingerprints fixed by cyanoacrylate glue fuming, NI-DB is capable of detecting and imaging latent fingerprints (LFPs) via its intrinsic fluorescence emission. Accordingly, such an AIE-active fluorophore is expected to be an ideal material that would reach the reliable optical detection and imaging of LFPs.

A density functional theory (DFT) study was carried out to unveil the effect of the protonation and the solvation on the molecular properties of methyl orange (MO) anion. In the gas phase, the sulfonate is the strongest proton acceptor and shows the least energy barrier for the cis-to-trans isomerization, while the protonation at azo N atom is the most stable in both the equilibrium and transition states in the aqueous solution.

A flexible iridium oxide-based nanopillar array pH sensor is fabricated using soft-lithography and electrochemical deposition steps, resulting in high sensitivity, a fast response time, good repeatability, and selectivity. A wearable sweat-sensing system is designed by integrating the pH sensor with a wireless electronic module, demonstrating real-time monitoring of pH dynamics in the sweat of a volunteer during an indoor cycling exercise.