이상엽 교수

Germanium‐filled SiO 2 nanotubes and aligned SiO 2 nanofibers are synthesized via a two‐stage process: thermal evaporation of SiO powder, followed by laser ablation of a Ge target. The nanotubes are either partially filled with Ge nanoparticles/nanorods or completely filled with Ge nanowires, forming Ge/SiO2 nanocables (see Figure). The products were characterized using a variety of spectroscopic techniques.

A comprehensive method to prepare a one-dimensional (1D) metal–organic framework (MOF) has attracted research interest because the 1D MOFs are useful as precursor materials for the preparation of highly porous carbon nanorods with outstanding electrical conductivity and mechanical strength, making them particularly suitable for electrochemical applications. Herein, the synthesis of 1D zeolitic imidazolate framework-8 (ZIF-8) nanorods is reported using the metal-induced self-assembly templates of

The strong bonding at the interface between the metal and the support, which can inhibit the undesirable aggregation of metal nanoparticles and carbon deposition from reforming of hydrocarbon, is well known as the classical strong metal-support interaction (SMSI). SMSI of nanocatalysts was significantly affected by heat treatment and reducing conditions during catalyst preparation.the heat treatment and reduction conditions during catalyst preparation. SMSI can be weakened by the decrement of me

Multidrug resistance (MDR) of cancer cells reduces chemotherapeutic efficacy by preventing drug accumulation in the cells through a drug efflux pump and lysosomal sequestration/exocytosis. Herein, to overcome such anticancer resistance, lysosome-targeted self-assembly of perylene diimide (PDI) derivatives is presented as a powerful strategy for effective and selective anticancer therapy. Stimulated by the lysosomal low pH, the amphiphilic PDI derivatives functionalized with amino acids (PDI-AAs)

Abstract Recently, a new catalyst that mimics carbonic anhydrase (CA) was constructed by the self‐assembly of histidyl bolaamphiphilic molecules and a Zn ion cofactor. The catalytic Zn ion complex in a tetrahedral coordination geometry is composed of self‐organized histidyl imidazoles and a single hydroxide ion. However, the Znhydroxide coordination, the key structure of the catalytic analogue, is disturbed by the pairing anion of the Zn salt. Here, the performances of the CA‐mimicking catalyst

With a high-metal loading of 17.7 wt%, a single-atom Cu( i )N 3 catalyst was prepared using a Cu–benzimidazole complex, exhibiting high reactivity (6.1 mmol g −1 h −1 ) and ∼90% selectivity in methane partial oxidation.

An artificial photosynthesis system coupled with an enzyme was constructed using the nanospherical self-assembly of tyrosyl bolaamphiphiles, which worked as a host matrix exhibiting an antenna effect that allowed enhanced energy transfer to the ZnDPEG photosensitizer. The excited electrons from the photosensitizer were transferred to NAD+ to produce NADH, which subsequently initiated the conversion of an aldehyde to ethanol by alcohol dehydrogenase. Production of NADH and ethanol was enhanced by

Bolaamphiphilic molecules with tyrosyl end groups formed interior-filled spherical self-assemblies, which are distinct from the vesicular or tubular structures of other similar peptidic bolaamphiphile assemblies reported in the literature. In this study, the self-assembly mechanism of these tyrosyl bolaamphiphiles was investigated taking into consideration the solvent effects on the molecular interaction forces using molecular modeling. The dissipative particle dynamics simulation of an aqueous

A horseradish peroxidase (HRP) mimetic catalyst was constructed by tethering hemin to the cysteinyl bolaamphiphile assembly through thiol–Fe bond. The prepared catalyst showed high catalytic activity comparable to HRP even at the high temperature.

Bolaamphiphile, which is a class of amphiphilic molecules, has a unique structure of two hydrophilic head groups at the ends of the hydrophobic center. Peptidic bolaamphiphiles that employ peptides or amino acids as their hydrophilic groups exhibit unique biochemical activities when they self-organize into supramolecular structures, which are not observed in a single molecule. The self-assembled peptidic bolaamphiphiles hold considerable promise for imitating proteins with biochemical activities