Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Umesh Palnitkar"'
Autor:
Brajesh S. Yadav, Umesh Palnitkar, Parlapalli V. Satyam, Pawan Tyagi, Lucky Krishnia, Nikhil Koratkar, Bipin Kumar Gupta
Publikováno v:
Applied Surface Science. 443:184-190
The present study aims to demonstrate the application of sugarcane bagasse as an excellent field emitter. Field emission property of as-pyrolyzed sugarcane bagasse (p-SBg) before and after the plasma treatment has been investigated. It has been obser
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bd76e73e38970f11d9e6c00fd7f9621
https://doi.org/10.1016/j.apsusc.2018.02.235
https://doi.org/10.1016/j.apsusc.2018.02.235
Autor:
Artemis Stamboulis, I-Nan Lin, Alexei Zakharov, Umesh Palnitkar, Pagona Papakonstantinou, Peng Wang, Naigui Shang, Ming Chu
Publikováno v:
ACS Nano. 3:1032-1038
We report the growth of ultrathin diamond nanorods (DNRs) by a microwave plasma assisted chemical vapor deposition method using a mixture gas of nitrogen and methane. DNRs have a diameter as thin as 2.1 nm, which is not only smaller than reported one
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f5e29646796984589d21d569ab9d6df
https://doi.org/10.1021/nn900167p
https://doi.org/10.1021/nn900167p
Autor:
Abhinav Pratap Singh, Balakrishnan Sundaravel, Umesh Palnitkar, Huang-Chin Chen, I-Nan Lin, Ravi Kumar Ranade
Publikováno v:
Diamond and Related Materials. 18:164-168
Enhanced field emission is observed in nanocrystalline diamond (NCD) films upon irradiation with 100 MeV Ag9+ ions in the range of fluences from 5 × 1010 to 5 × 1011 ions/cm2. Field emission characteristics monotonically changes with the ion beam f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bda7338ddf9260ce5305193a9e5b1ff0
https://doi.org/10.1016/j.diamond.2008.11.008
https://doi.org/10.1016/j.diamond.2008.11.008
Autor:
Kuei-Hsien Chen, Umesh Palnitkar, Li-Chyong Chen, I.-Nan Lin, Pagona Papakonstantinou, Sekhar C. Ray, W. F. Pong, H. M. Tsai, C. W. Pao
Publikováno v:
Diamond and Related Materials. 18:457-460
Multi-wall nitrogenated carbon nanotubes (N-CNTs) are modified by the chlorine–plasma treatment (N-CNTs:Cl) and hence studied their field emission characteristics. It is observed that the turn-on voltage of N-CNTs is decreased from ~ 1.0 V/µm to ~
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87c45c74deb04279653ea33dbcda787f
https://doi.org/10.1016/j.diamond.2008.07.016
https://doi.org/10.1016/j.diamond.2008.07.016
Publikováno v:
Journal of Nanoscience and Nanotechnology. 8:4198-4201
Different forms of diamond have been shown to have qualities as field emission sources. As a consequence, much effort has been focused on both the synthesis of diamond nanostructures to increase the field enhancement factor and understanding the emis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98d125578edb7b173343161a49f44336
https://doi.org/10.1166/jnn.2008.an49
https://doi.org/10.1166/jnn.2008.an49
Publikováno v:
Diamond and Related Materials. 17:1812-1816
Nitrogen (N) ion implantation induced modification on structural and electron field emission (EFE) properties of ultrananocrystalline diamond (UNCD) films were reported. Low dose ion implantation slightly improved the EFE properties of UNCD films mai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f7d348ad617029b3fcbfa6f11ddc598
https://doi.org/10.1016/j.diamond.2008.03.032
https://doi.org/10.1016/j.diamond.2008.03.032
Autor:
Wei-Chuan Fang, Huan Niu, H.Y. Huang, N.H. Tai, Umesh Palnitkar, I-Nan Lin, P.T. Joseph, Hsiu Fung Cheng
Publikováno v:
Diamond and Related Materials. 17:864-867
Ultra-nanocrystalline diamond (UNCD) films prepared by microwave plasma enhanced chemical vapor deposition were implanted using 0.3 MeV nitrogen ions under a dose of 10 13 , 10 14 , and 10 15 ions cm − 2 . While the surface morphology of the UNCD f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::528a71b10c2c0f5c76e789654f45e5ee
https://doi.org/10.1016/j.diamond.2007.11.008
https://doi.org/10.1016/j.diamond.2007.11.008
Autor:
S.K. Kulshreshtha, F. Le Normand, Manoj K. Singh, D.S. Misra, Abha Misra, Mainak Roy, Padmnabh Rai, Pawan Tyagi, Umesh Palnitkar, K.N. Narayanan Unni
Publikováno v:
Diam. Relat. Mater.
Diam. Relat. Mater., 2006, 15, pp.304-308
Diam. Relat. Mater., 2006, 15, pp.304-308
Single crystal diamond films of varying quality are deposited using microwave plasma chemical vapor deposition (MPCVD) apparatus. Unpolished natural diamond seeds are used as substrates in the temperature (Ts) range 850–1200 °C. The gas mixture of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6af9a65673b08f447f4e96fbd8836d1a
https://doi.org/10.1016/j.diamond.2005.08.054
https://doi.org/10.1016/j.diamond.2005.08.054
Autor:
S.K. Kulshreshtha, Mainak Roy, Manoj K. Singh, Abha Misra, N. Ali, Elby Titus, D.S. Misra, Pawan Tyagi, José Grácio, G. Cabral, Umesh Palnitkar
Publikováno v:
Thin Solid Films. :127-130
Carbon nanotubes (CNTs) filled with ferromagnetic materials have the potentials for use in magnetic scanning probe microscopy and as an assembly of aligned high density magnetic nanocores for future magnetic data storage devices. Highly ordered and u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48f2332c5c8aa8252580c0e8293647a6
https://doi.org/10.1016/j.tsf.2004.08.070
https://doi.org/10.1016/j.tsf.2004.08.070
Autor:
Elby Titus, Manoj K. Singh, K.N. Unni, D.K. Avasthi, Pawan Tyagi, P. Ayuub, V. S. Shirodkar, D. S. Misra, Umesh Palnitkar
Publikováno v:
Diamond and Related Materials. 12:1771-1775
The self-supported diamond sheets were deposited at various deposition pressure (Pd) using HFCVD technique. The sheets were characterized using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM). XRD shows the growth of c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aad72324a91c56eb9b8bac38d6ee93f5
https://doi.org/10.1016/s0925-9635(03)00287-5
https://doi.org/10.1016/s0925-9635(03)00287-5