4,218 publications from this institution
Pre-growth pressure control in a solid–vapor process leads to the synthesis of single-crystal ZnO nanosprings at high yield (>50 %). This study demonstrates the possibility of synthesizing nanosprings (see image) of high purity and at high yield, and makes systematic understanding of the properties and exploration of the applications of semiconducting and piezoelectric ZnO nanosprings achievable.
Utilizing the piezoelectric effect of ZnO nanowires, nanogenerators have been fabricated for producing an output of 10–20 V. On page 280, Zhong Lin Wang demonstrates a self-powered system by integrating a nanogenerator with sensors, energy storage units, a data processor, and a wireless transmitter, which can operate without a battery by harvesting mechanical energy from the environment. Such systems have application in biomedical science, environmental monitoring, structural monitoring, and personal electronics.
Self-assembly of FePt and Fe3O4 nanoparticles of different sizes led to various FePt–Fe3O4 nanocomposites. Annealing the composite under reducing atmosphere at 650 and 700 °C induced magnetically hard FePt phase and magnetically soft Fe3Pt phase. The FePt and Fe3Pt phases were either linked by a common interface or coexisted within one grain as domains with sizes <10 nm. This ensures the effective exchange coupling of magnetically hard and soft phases. High-resolution transmission electron microscopy studies provide detailed structural characterization for the FePt based nanocomposites.
We demonstrate the rapid, large-area transformation of bioenabled graphene laminates into multidimensional geometries for pop-up and stretchable applications. Water-vapor annealing facilitates the controlled plasticization of the multilayered silk–graphene morphologies, allowing highly localized kirigami cuts by programmable drag knife with diverse type and depth of cuts. By adjusting drag-knife depth, we can generate a microscale array of full and partial cuts, enabling a purely topological approach toward the control of metastable fold–unfold states and crack fracture paths in kirigami structures. Through orthogonal control over the graphene–silk compositeʼs nanoscale morphology, cut pattern, and semimetal-like conductivity, we showcase bioenabled laminates as a platform for prospective soft and shape-transforming electronics as flexible interconnects and stretchable energy harvesters.
