Thesis

Physics Ph.D. Thesis
Ferroelectricity in Free Niobium Clusters
Georgia Institute of Technology, (2003)
Thesis at the Georgia Tech Library

Papers

  1. All-dielectric Metasurfaces and Their Applications in the Terahertz Range
    Danni Hao, Jinwei Liu, Pinggen Zou, Yi Zhang, Ramiro Moro, and Lei Ma
    Laser and Photonics Reviews, 2301210 (2024)

  2. Simple high-resolution Bradbury–Nielsen mass gate
    Zezhao Jia, Zhaojun Liu, Xiaohan Wang, Runyu Wang, Tianjie Ma, Ziwen Zhou,
    Ramiro Moro, Bernd von Issendorff, and Lei Ma
    AIP Advances, 14, 035312 (2024)

  3. Ultrahigh-mobility semiconducting epitaxial graphene on silicon carbide
    Jian Zhao, Peixuan Ji, Yaqi Li, Rui Li, Kaimin Zhang, Hao Tian, Kaicheng Yu, Boyue Bian,
    Luzhen Hao, Xue Xiao, Will Griffin, Noel Dudeck, Ramiro Moro, Lei Ma, Walt A. de Heer
    Nature 625, 60-65 (2024)

  4. Dual-frequency switchable bandpass filter in the terahertz range based on enhanced trapped-mode resonances
    Yi Zhang, Dongxun Yang, Dan Zhao, Danni Hao, Pinggen, Yanmei Ren, Rui Li, Xiaodong Zhu, Fei Fan, Shengjiang Chang, Ramiro Moro, Lei Ma
    Chem. Phys. Lett. 826, 140637 (2023)

  5. Design of a simple and low-cost solid-state ultra-fast high-voltage switch
    Ziwen Zhou, Yifan Li, Zhaojun Liu, Runyu Wang, Tianjie Ma, Zezhao Jia, Guangjia Yin, Ramiro Moro, Lei Ma
    Rev. Sci. Instrum. 94, 064709 (2023)

  6. Structural evolution, electronic and magnetic properties investigation of V3Sin− (n=14–18) clusters
    based on photoelectron spectroscopy and density functional theory calculations
    Kai Wang, Guang-Jia Yin, Ze-Zhao Jia, Lin Miao, Hong-Yuan Zhao, Ramiro Moro, Bernd von Issendorff, Lei Ma
    Chem. Phys. Lett. 820, 140423 (2023)

  7. Role of temperature and Ar flow on the uniformity of epitaxial graphene grown on SiC
    Zhenzhen Zhang, Dongxun Yang, Gang Dong, Rui Li, Yi Zhang, Ramiro Moro, Yanqing Ma & Lei Ma
    Bull Mater Sci 46, 60 (2023)

  8. La-doped BiFeO3 junction based random access multilevel nonvolatile memory
    Dong Li, Xiaodong Zhu, Yanan Wu, Jian Zhao, Kaimin Zhang, Rui Li, Danni Hao,Yanqing Ma, Ramiro Moro, Lei Ma
    Microelectronic Engineering 267–268 111908 (2023)

  9. Fourth generation cryogenic neutral cluster beam apparatus for studying fundamental properties of metallic clusters
    Lin Miao, Zhaojun Liu, Zeyang Chen, Xiaohan Wang, Ziwen Zhou, Jinbo Zhao, Shaozheng Fang, Guangjia Yin,
    Zezhao Jia, Jin Liu, Ramiro Moro, Walt A. deHeer, and Lei Ma
    Rev. Sci. Instrum. 93, 113310 (2022)

  10. Silicon bowtie structure based adjustable nonrigid all-nonmetal metamaterial terahertz filter
    Danni Hao, Yi Zhang, Dongxun Yang, Rui Li, Dan Zhao, Zhenzhen Zhang, Shuai Wang, Wei Jin, Hao Tian,
    Jiaying Duan, Fei Fan, Shengjiang Chang, Ramiro Moro, and Lei Ma
    Opt. Lett. 47(23), pp. 6101-6104 (2022)

  11. Reconciliation of the Theoretical and Experimental Value of the Static Electric Polarizability of the Aluminum Atom
    Kai Wang, Shao‑Zheng Fang, Zheng Fan, Hong‑Yuan Zhao, Lin Miao, Guang‑Jia Yin, Ramiro Moro, Lei Ma
    Journal of Cluster Science 34 2147-2151 (2023)

  12. Structural evolution and electronic properties of pure and semiconductor atom doped In clusters
    Inn, InnSi, and InnGe (n=3-16)
    Kai Wang, Lin Miao, Zezhao Jia, Runyu Wang, Guangjia Yin, Xiaodong Zhu, Ramiro Moro, Lei Ma
    J. Comput. Chem. 2022, 43(29), 1978 (2022)

  13. TMGe8-17− (TM = Ti, Zr, Hf, V, Nb, Ta) clusters: group determined properties
    Kai Wang, Ze-Zhao Jia, Run-Yu Wang, Xiao-Dong Zhu, Ramiro Moro, Lei Ma
    Eur. Phys. J. Plus 137, 949 (2022)

  14. Anion photoelectron spectroscopy and density functional theory study of TM2Sin (TM = V, Cr; n = 14–20) clusters
    Kai Wang, Guang-Jia Yin, Ze-Zhao Jia, Lin Miao, Ramiro Moro, Bernd von Issendorff and Lei Ma
    Phys. Chem. Chem. Phys. 24, 18321-18330 (2022)

  15. Hydrogen etching of 4H–SiC(0001) facet and step formation
    Rui Li, Kaimin Zhang, Yi Zhang, Zhenzhen Zhang, Peixuan Ji, Chengqian Shi, Danni Hao, Yipeng Zhang, Ramiro Moro, Yanqing Ma, Lei Ma
    Materials Science in Semiconductor Processing 149, 106896 (2022)

  16. Chiral biosensing using terahertz twisted chiral metamaterial
    Min Zhang, Danni Hao, Shuai Wang, Rui Li, Shou Wang, Yanqing Ma, Ramiro Moro, and Lei Ma
    Opt. Express 30 Issue 9, pp. 14651-14660 (2022)

  17. Structures and electronic properties of VSin-(n = 14–20) clusters:
    a combined experimental and density functional theory study
    Kai Wang, Ze-Zhao Jia, Zheng Fan, Hong-Yuan Zhao, Guang-Jia Yin,
    Ramiro Moro, Bernd von Issendorff and Lei Ma
    Phys. Chem. Chem. Phys. 24, 8839-8845 (2022)

  18. A general strategy for polishing SiC wafers to atomic smoothness with arbitrary facets
    Peixuan Ji, Kaimin Zhang, Zhenzhen Zhang, Mei Zhao, Rui Li, Danni Hao, Ramiro Moro, Yanqing Ma,Lei Ma
    Materials Science in Semiconductor Processing 144, 106628 (2022)

  19. Photoelectron Spectroscopy and Density Functional Investigation of the Structural Evolution, Electronic,
    and Magnetic Properties of CrSin− (n = 14−18) Clusters
    Kai Wang, Hong-Yuan Zhao, Lin Miao, Ze-Zhao Jia, Guang-Jia Yin, Xiao-Dong Zhu, Ramiro Moro,
    Bernd von Issendorff, and Lei Ma
    J. Phys. Chem. A. (2022), 126, 8, 1329–1335

  20. Recent Advances in Graphene-Based Field-Effect-Transistor Biosensors: A Review on Biosensor Designing Strategy
    Shuo Wang, Xin Qi, Danni Hao, Ramiro Moro, Yanqing Ma and Lei Ma
    J. Electrochem. Soc. 169, 027509 (2022)

  21. Real-time size tuning and measuring of silver nanoparticles by cyclic voltammetry and Raman spectroscopy
    Shuo Wang, Xin Yan, Min Zhang, Gang Dong, Ramiro Moro, Yanqing Ma, and Lei Ma
    Materials Letters 310, 131420 (2021)

  22. Static dipole polarizabilities of atoms and ions from Z=1 to 20 calculated within a single theoretical scheme
    Kai Wang, Xiaohan Wang, Zheng Fan, Hong-Yuan Zhao, Lin Miao, Guang-Jia Yin, Ramiro Moro, and Lei Ma
    Eur. Phys. J. D. 75, 46 (2021)
    Reprint

  23. A simple Field Programmable Gate Array (FPGA) based high precision low-jitter delay generator
    Zeyang Chen, Xiaohan Wang, Ziwen Zhou, Ramiro Moro, and Lei Ma
    Rev. Sci. Instrum. 92, 024701 (2021)
    Reprint

  24. High Sensitive Biosensors Based on the Coupling Between Surface Plasmon Polaritons on Titanium Nitride and a Planar Waveguide Mode
    Junior Asencios, Ramiro Moro, Clemente Luyo, and Arturo Talledo
    Sensors 2020, 20(6), 1784 (2020)

  25. High-Performance UV-Assisted NO2 Sensor Based on Chemical Vapor Deposition Graphene at Room Temperature
    Xin Yan, Yanan Wu, Rui Li, Chengqian Shi, Ramiro Moro, Yanqing Ma, and Lei Ma
    ACS Omega 2019, 4, 14179−14187 (2019)

  26. Spectral and Angular Responses of High Sensitivity Refractive Index Sensors Based on Titanium Nitride
    Junior Asencios, Arturo Talledo, Brayan Atoccsa, Ruben Puga, Héctor Loro, and Ramiro Moro
    2019 PhotonIcs & Electromagnetics Research Symposium, Spring, Rome, Italy pp.4285-4291, (2019)

  27. Improved Subsalt Images with Shot Patch-based Angle Gather Illumination Weighting
    Qingqing Sun, Ramiro Moro, Weiping Gou and Nicolas Chazalnoel
    77th EAGE Conference and Exhibition 2015, Madrid, Spain, volume 2015, p.1-5

  28. Measured atomic ground-state polarizabilities of 35 metallic elements
    Lei Ma, John Indergaard, Baiqian Zhang, Ilia Larkin, Ramiro Moro, and Walt A. de Heer
    Phys. Rev. A. 91, 01050(R) (2015)

  29. Multiferroic Rhodium Clusters
    Lei Ma, Ramiro Moro, John Bowlan, Andrei Kirilyuk, and Walt A. de Heer
    Phys. Rev. Lett. 113, 157203 (2014)

  30. Metastability of Free Cobalt and Iron Clusters: A Possible Precursor to Bulk Ferromagnetism
    Xiaoshan Xu, Shuangye Yin, Ramiro Moro, Anthony Liang, John Bowlan, and Walt A. de Heer
    Phys. Rev. Lett. 107, 057203 (2011)
    Preprint

  31. Electric dipole moments of nitric acid-water complexes measured by cluster beam deflection
    Ramiro Moro, Jonathon Heinrich, and Vitaly V. Kresin
    Proceedings of The Fourth International Symposium on Atomic Cluster Collisions, ISACC 2009
    AIP Conf. Proc. 1197, 57-64 (2009)
    Preprint

  32. Distribution of magnetization of a cold ferromagnetic cluster beam
    Xiaoshan Xu, Shuangye Yin, Ramiro Moro, and Walt A. de Heer
    Phys. Rev. B. 78, 054430 (2008)

  33. Electron pairing in ferroelectric niobium and niobium alloy clusters
    Shuangye Yin, Xiaoshan Xu, Anthony Liang, John Bowlan, Ramiro Moro, and Walt A. de Heer
    Journal of Superconductivity and Novel Magnetism 21(5), 265-269 (2008)

  34. Orientation of dipole molecules and clusters upon adiabatic entry into an external field
    J. Bulthuis, J. A. Becker, R. Moro, and V. V. Kresin
    J. Chem. Phys. 129, 024101 (2008)
    Preprint

  35. Changing the fragmentation pattern of molecules in helium nanodroplets by co-embedding with water
    Yanfei Ren, Ramiro Moro, and Vitaly V. Kresin
    Eur. Phys. J. D. 43, 109 (2007)

  36. Magnetic Enhancement in Cobalt-Manganese Alloy Clusters
    Shuangye Yin, Ramiro Moro, Xiaoshan Xu, and Walt A. de Heer
    Phys. Rev. Lett. 98, 113401 (2007)

  37. Nonclassical dipoles in cold niobium clusters
    Xiaoshan Xu, Shuangye Yin, Ramiro Moro, Anthony Liang, John Bowlan, and Walt A. de Heer
    Phys. Rev. B. 75, 085429 (2007)
    Preprint

  38. Electrostatic deflection of the water molecule: A fundamental asymmetric rotor
    Ramiro Moro, Jaap Bulthuis, Jonathon Heinrich, and Vitaly V. Kresin
    Phys. Rev. A. 75, 013415 (2007)
    Preprint

  39. Electric Dipole Moments of Water Clusters from a Beam Deflection Measurement
    Ramiro Moro, Roman Rabinovitch, Chunlei Xia, and Vitaly V. Kresin
    Phys. Rev. Lett. 97, 123401 (2006)

  40. Surface-impact ionization of alkali nanoparticles
    Chunlei Xia, Roman Rabinovitch, Ramiro Moro, and Vitaly V. Kresin
    International Journal of Mass Spectrometry 252, 142-144 (2006)

  41. Loss of chlorine in mass spectra of DCl picked up by water clusters in a beam
    Ramiro Moro, Roman Rabinovitch, and Vitaly V. Kresin
    J. Chem. Phys. 124, 146102 (2006)

  42. Measurement of magnetic moments of free BiNMnM clusters
    Shuangye Yin, Xiaoshan Xu, Ramiro Moro, and Walt A. de Heer
    Phys. Rev. B. 72, 174410 (2005)

  43. Pick-up cell for cluster beam experiments
    Ramiro Moro, Roman Rabinovitch, and Vitaly V. Kresin
    Rev. Sci. Instrum. 76, 056104 (2005)

  44. Amino-acid and water molecules adsorbed on water clusters in a beam
    Ramiro Moro, Roman Rabinovitch, and Vitaly V. Kresin
    J. Chem. Phys. 123, 074301 (2005)

  45. Magnetic Moments and Adiabatic Magnetization of Free Cobalt Clusters
    Xiaoshan Xu, Shuangye Yin, Ramiro Moro, and Walt A. de Heer
    Phys. Rev. Lett. 95, 237209, (2005)

  46. Spin Uncoupling in Free Niobium Clusters: Support for Nascent Superconductivity
    Ramiro Moro, Shuangye Yin, Xiaoshan Xu, Walt A. de Heer
    Phys. Rev. Lett. 93, 086803, (2004)

  47. Ferroelectricity in Free Niobium Clusters
    Ramiro Moro, Xiaoshan Xu, Shuangye Yin, Walt A. de Heer
    Science 300, 1265-1269, (2003)

Posters

  1. A Versatile Molecular Beam Machine
    Ramiro Moro, Patrice Keghelian, Philippe Poncharal, Walt A. de Heer
    ISSPIC-10 Conference, Atlanta, GA 2000
    Abstract

  2. Magnetic Deflections in a Molecular Beam
    Ramiro Moro, Patrice Keghelian, Walt A. de Heer
    ISSPIC-10 Conference, Atlanta, GA 2000
    Aluminum Atom as a Temperature Probe in a Molecular Beam
    Abstract

  3. Electric dipole moments of water clusters from a beam deflection measurement
    Ramiro Moro, Roman Rabinovitch, Chunlei Xia, Vitaly Kresin
    ISSPIC-13 Conference, Goteborg, Sweden 2006

  4. Tight binding model of nanopatterned graphene
    David Mutala, Matthew McLauglin, Ramiro Moro
    Oklahoma Research Day, Edmond, OK 2008

  5. Scaled-up diffraction of crystals and helixes
    Kyle Adams, William Clark, Ramiro Moro
    Oklahoma Research Day, Lawton, OK 2010

  6. Electrical polarizability of a few electrons in a parabolic potential in the presence of a pairing interaction
    Matthew McLaughlin, Ramiro Moro
    Oklahoma Research Day, Lawton, OK 2010