Single-crystal n-type GaN nanowires have been grown epitaxially on a Mg-doped p-type GaN substrate. Piezoelectric nanognerators based on GaN nanowires are investigated by conductive AFM, and the results showed an output power density of nearly 12.5 mW/m(2). Luminous LED modules based on n-GaN nanowires/p-GaN substrate have been fabricated. CCD images of the lighted LED and the corresponding electroluminescence spectra are recorded at a forward bias. Moreover, the GaN nanowire LED can be lighted up by the power provided by a ZnO nanowire based nanogenerator, demonstrating a self-powered LED using wurtzite-structured nanomaterials.
A nanofluidic device is presented that, enables independent sensing and resensing of a single DNA molecule translocating through two nanopores with sub‐micrometer spacing. The device concept is based upon integrating a thin nitride membrane with microchannels etched in borosilicate glass. Pores, coupled to each microchannel, are connected via a fluid‐filled half‐space on the device backside, enabling translocation of molecules across each pore in sequence. Critically, this approach allows for independent application of control voltage and measurement of trans‐pore ionic current at each of the two pores, leading to 1) controlled assessment of molecular time of flight, 2) voltage‐tuned selective molecule recapture, and 3) ability to acquire two correlated translocation signatures for each molecule analyzed. Finally, the rare cocapture of a single chain threading simultaneously through each of the two pores is reported.
The nonionic, red-emitting complexes [Os(fppz)2L2] (L = PPh2Me (1), PPhMe2 (2)) and [Os(bptz)2L2] (L = PPh2Me (3)) were synthesized, showing
highly intense red phosphorescent emission in CH2Cl2
solution at λmax 617, 632, and 649 nm, respectively. The
electroluminescent properties of these compounds on
OLEDs showed promising device efficiencies required for
future OLED applications.
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