@article{barletta_berkman_moody_el-masry_emara_reed_bedair_2007, title={Development of green, yellow, and amber light emitting diodes using InGaN multiple quantum well structures}, volume={90}, ISSN={["0003-6951"]}, DOI={10.1063/1.2721133}, abstractNote={The authors present optical and electrical data for long wavelength (573–601nm) InGaN∕GaN multiple quantum well light emitting diodes (LEDs) grown by metal organic chemical vapor deposition. These results are achieved by optimizing the active layer growth temperature and the quantum well width. Also, the p-GaN is grown at low temperature to avoid the disintegration of the InGaN quantum wells with high InN content. A redshift is observed for both the green and yellow LEDs upon decreasing the injection current at low current regime. In the case of the yellow LED, this shift is enough to push emission into the amber (601nm).}, number={15}, journal={APPLIED PHYSICS LETTERS}, author={Barletta, Philip T. and Berkman, E. Acar and Moody, Baxter F. and El-Masry, Nadia A. and Emara, Ahmed M. and Reed, Mason J. and Bedair, S. M.}, year={2007}, month={Apr} }
 @article{moody_barletta_el-masry_roberts_aumer_leboeuf_bedair_2002, title={Effect of H-2 on nitrogen incorporation in the metalorganic chemical vapor deposition of GaAs1-yNy (0 <= y <= 0.08)}, volume={80}, ISSN={["0003-6951"]}, DOI={10.1063/1.1464225}, abstractNote={The effect of hydrogen on the incorporation of nitrogen in GaAs1−yNy grown by metalorganic chemical vapor deposition (MOCVD) is reported. Nitrogen content as high as y=0.081 has been achieved when the use of H2 is completely avoided in the MOCVD growth of GaAs1−yNy. When H2 is added to the growth ambient, the value of y in GaAs1−yNy decreases as the relative percent of H2 in the carrier gas increases. We will report on the properties of these GaAsN films and discuss the nature of the effect that H2 has on modulating the N content in these films.}, number={14}, journal={APPLIED PHYSICS LETTERS}, author={Moody, BF and Barletta, PT and El-Masry, NA and Roberts, JC and Aumer, ME and LeBoeuf, SF and Bedair, SM}, year={2002}, month={Apr}, pages={2475–2477} }
 @article{hyun_barletta_koh_yoo_oh_aspnes_cuomo_2000, title={Effect of Ar+ ion beam in the process of plasma surface modification of PET films}, volume={77}, ISSN={["0021-8995"]}, DOI={10.1002/1097-4628(20000822)77:8<1679::AID-APP4>3.0.CO;2-F}, abstractNote={In general, plasma modified polymer surfaces tend to show short aging time and rapid hydrophobic recovery after treatment. To prevent reorientation from the surface to the bulk, appropriate crosslinking is necessary among the polymer chains. In this work, an Ar+ ion beam was used to provide crosslinking to the surface. Crosslinking was shown by spectroscopic ellipsometry, AFM, and FTIR. Contact angle measurements were performed to see the aging of the modified surfaces. The surface modified with Ar+ ion beam followed by RF plasma treatment exhibited reduced chain mobility and a highly stable hydrophilic surface. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 1679–1683, 2000}, number={8}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Hyun, J and Barletta, P and Koh, K and Yoo, S and Oh, J and Aspnes, DE and Cuomo, JJ}, year={2000}, month={Aug}, pages={1679–1683} }
 @article{park_camphausen_myers_barletta_sakhrani_bergman_nemanich_cuomo_1999, title={Raman scattering of tetrahedrally-bonded amorphous carbon deposited at oblique angles}, volume={41}, ISSN={["1873-4979"]}, DOI={10.1016/S0167-577X(99)00135-4}, abstractNote={Amorphous carbon (txa-C1−x) films were prepared by filtered cathodic arc deposition (FCAD). The films were deposited on p-type Si (111). The angle of beam incidence was varied from 0° to 75° with respect to the substrate normal. Micro-Raman spectroscopy, electron energy loss spectroscopy (EELS), and transmission electron microscopy (TEM) were carried out for sample analysis. It was found that the position of the G peak shifts to a higher wave number region as the angle of incidence increases. This means that the sp2/sp3 ratio increases with increasing angle. This conclusion is supported by EELS. The film deposited at an angle of 75° exhibits a columnar structure with alternating high and low carbon density regions.}, number={5}, journal={MATERIALS LETTERS}, author={Park, M and Camphausen, SM and Myers, AF and Barletta, PT and Sakhrani, V and Bergman, L and Nemanich, RJ and Cuomo, JJ}, year={1999}, month={Dec}, pages={229–233} }