The spectral position of light emission from an individual carbon nanotube is shown to depend on the location of the nanotube within the focal spot, while no such effect is present for macroscopic emitters. In addition, in contrast to macroscopic emitters, the measured line width from the nanotube emitter is independent of spectrometer entrance slit width. The effects are general for any nanosc...

With the advent of high-energy collimators and dual-head coincidence cameras, standard nuclear medicine facilities will soon begin imaging with PET isotopes. The use of 511keV emitters raises new radiation safety concerns for technologists traditionally limited to handling mTc and other low-energy isotopes. This article is a basic review of positron emitters, measurement concerns, exposure rate...

We present a detailed characterization of the Lya properties for 93 emitters (LAEs) at z~3.1 selected from D1 field Canada-France-Hawaii-Telescope Legacy Survey, including 24 members massive protocluster. The median-stacked image shows an extended halo (LAH) surrounding galaxy with exponential scale length 4.9+/-0.7kpc, which accounts roughly half total line flux. Accounting LAH contribution, e...

Using a simple method to interpret the luminosity function of Lyα emitters, we explore properties of Lyα emitters from 5.7 6 z 6 8.8 with various assumptions about metallicity and stellar mass spectra. We constrain a mass-to-“observed light” ratio, Mh/Lband, where Mh refers to the total mass of the host halo, and Lband refers to the observed luminosity of the source. For narrow-band surveys, Lb...

We report on the improved field emission performance of graphene foam (GF) following transient exposure to hydrogen plasma. The enhanced field emission mechanism associated with hydrogenation has been investigated using Fourier transform infrared spectroscopy, plasma spectrophotometry, Raman spectroscopy, and scanning electron microscopy. The observed enhanced electron emissionhas been attribut...

Application of various one-dimensional nanostructure materials as field emission sources has attracted extensive scientific efforts. Elongated structures are suitable for achieving high field-emission-current density at a low electric field because of their high aspect ratio. Area of its application includes a wide range of field-emission-based devices such as flat-panel displays, electron micr...

Single molecule localization based super-resolution imaging techniques require repeated localization of many single emitters. We describe a method that uses the maximum likelihood estimator to localize multiple emitters simultaneously within a single, two-dimensional fitting sub-region, yielding an order of magnitude improvement in the tolerance of the analysis routine with regards to the singl...

We report the design, fabrication, and experimental characterization of an externally-fed, silicon batchfabricated MEMS electrospinning planar array with as many as 9 steady-operating emitters in 1 cm – more than a 7-fold increase in emitter density compared to state-of-the-art MEMS multiplexed electrospinning sources. The device simultaneously generates multiple nanofiber jets at 20 kV or less...