Low Temperature Solution Based Synthesis of Stabilized Cs4PbBr6 Particles of High Luminescence
Abstract not provided.
Publications
Self-Assembly of Porphyrin Nanostructures
Abstract not provided.
Superfast assembly and synthesis of gold nanostructures using nanosecond low-temperature compression via magnetic pulsed power
Nature Communications
Gold nanostructured materials exhibit important size- and shape-dependent properties that enable a wide variety of applications in photocatalysis, nanoelectronics and phototherapy. Here we show the use of superfast dynamic compression to synthesize extended gold nanostructures, such as nanorods, nanowires and nanosheets, with nanosecond coalescence times. Using a pulsed power generator, we ramp compress spherical gold nanoparticle arrays to pressures of tens of GPa, demonstrating pressure-driven assembly beyond the quasi-static regime of the diamond anvil cell. Our dynamic magnetic ramp compression approach produces smooth, shockless (that is, isentropic) one-dimensional loading with low-temperature states suitable for nanostructure synthesis. Transmission electron microscopy clearly establishes that various gold architectures are formed through compressive mesoscale coalescences of spherical gold nanoparticles, which is further confirmed by in-situ synchrotron X-ray studies and large-scale simulation. This nanofabrication approach applies magnetically driven uniaxial ramp compression to mimic established embossing and imprinting processes, but at ultra-short (nanosecond) timescales.
Morphology-Controlled Synthesis and Metalation of Porphyrin Nanoparticles with Enhanced Photocatalytic Performance
Nano Letters
The design and engineering of the size, shape, and chemistry of photoactive building blocks enables the fabrication of functional nanoparticles for applications in light harvesting, photocatalytic synthesis, water splitting, phototherapy, and photodegradation. Here, we report the synthesis of such nanoparticles through a surfactant-assisted interfacial self-assembly process using optically active porphyrin as a functional building block. The self-assembly process relies on specific interactions such as π-π stacking and metalation (metal atoms and ligand coordination) between individual porphyrin building blocks. Depending on the kinetic conditions and type of surfactants, resulting structures exhibit well-defined one- to three-dimensional morphologies such as nanowires, nanooctahedra, and hierarchically ordered internal architectures. Specifically, electron microscopy and X-ray diffraction results indicate that these nanoparticles exhibit stable single-crystalline and nanoporous frameworks. Due to the hierarchical ordering of the porphyrins, the nanoparticles exhibit collective optical properties resulted from coupling of molecular porphyrins and photocatalytic activities such as photodegradation of methyl orange (MO) pollutants and hydrogen production.
Software for Quantum Dot Size Measurement
Abstract not provided.
Synthesis of Lead Iodide Perovskites for Solar Cell Application
Abstract not provided.
Self-Assembly of Porphyhrin Nanostructures
Abstract not provided.
Colloidal Lead-Iodide Perovskite Nanocrystals for Solar Cell Applications
Abstract not provided.
Measuring and modeling the electronic structure of explosives at the explosive/air interface
Abstract not provided.
Measuring and modeling the electronic structure of explosives at the explosive/air interface
Abstract not provided.
Pressure dependence of electronic states in secondary explosives: comparison between bulk and air/explosive interface
Abstract not provided.
Pressure dependence of electronic states in secondary explosives: comparison between bulk and air/explosive interface
Abstract not provided.
12 Results