The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Energies of emitted electrons from n-type diamond NEA surface and graphene/n-type diamond junction were measured by combined field emission spectroscopy/ultraviolet photoelectrons spectroscopy (FES/UPS) system. For n-type diamond NEA surface, the energies of emitted electrons indicated that the electrons emitted from conduction band of the diamond. For graphene/diamond junction, electron emission...
Nitrogen-incorporated ultrananocrystalline diamond, (N)UNCD, is an unconventional field emitter that performs in planar thin film configuration and has turn-on fields on the order of 10 V/ m. To shed more light on fundamental field emission properties of (N)UNCD, we have designed and commissioned a field emission microscope (FEM). The microscope can directly image the field emission site distribution...
Needle-like single crystal diamond structures were obtained by combination of the plasma enhanced chemical vapor deposition (CVD) and selective oxidation techniques. Field emission currents and total electron energy distributions were measured for individual diamond needles as functions of extraction voltage and the intensity of the femtosecond laser focused on the needle. Moreover, a new set-up based...
We present experimental results on laser-induced photoemission from nanotips made of different materials, and we compare photoemission from a metal surface (tungsten) to a dielectric (diamond). Ultrashort laser pulses (15–300 fs) are used to trigger electron emission from nanotips with radii < 100nm under a moderate tip bias. We show how different laser parameters as the repetition rate, the mean...
Silicon carbide field emission arrays coated with two different type of nanocrystalline diamond thin film: undoped and highly boron-doped are compared. The last one shows two times lower electric field threshold for electron emission.
In this study, amorphous selenium based photoconductor with different film thicknesses were fabricated and applied to prototype photodetectors. The use of thick photoconductor resulted in higher sensitivity due to carrier multiplication. Advantages and disadvantages of the thick photoconductor were investigated.
We report systematic investigations of the photo- and field induced electron emission from highly doped and highly ordered, flat polycrystalline diamond material by means of photo-field emission spectroscopy. The cathode was operated under pulsed tunable laser illumination (pulse duration tlaser=3.5 ns, photon energy hv=0.5−5.9 eV) in a wide power range of up to 0.7 GW/cm2 und under electrical fields...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.