Byrne DO, Ciston J, Allen FI. Probing Defectivity Beneath the Hydrocarbon Blanket in 2D hBN Using TEM-EELS. Microscopy and Microanalysis. 2024: ozae064. doi:10.1093/mam/ozae064
Allen FI, De Teresa JM, Onoa B. Focused Helium Ion and Electron Beam-Induced Deposition of Organometallic Tips for Dynamic Atomic Force Microscopy of Biomolecules in Liquid. ACS Appl Mater Interfaces. 2024;16: 4439–4448. doi:10.1021/acsami.3c16407
Höflich K, Hobler G, Allen FI, Wirtz T, Rius G, McElwee-White L, Krasheninnikov AV, Schmidt M, Utke I, Klingner N, Osenberg M, Córdoba R, Djurabekova F, Manke I, Moll P, Manoccio M, De Teresa JM, Bischoff L, Michler J, De Castro O, Delobbe A, Dunne P, Dobrovolskiy OV, Freese N, Gölzhäuser A, Mazarov P, Kölle D, Möller W, Pérez-Murano F, Philipp P, Vollnhals F, Hlawacek G. Roadmap for focused ion beam technologies. Applied Physics Reviews. 2023;10: 041311. doi:10.1063/5.0162597
Allen FI, Blanchard PT, Lake R, Pappas D, Xia D, Notte JA, Zhang R, Minor AM, Sanford NA. Fabrication of Specimens for Atom Probe Tomography Using a Combined Gallium and Neon Focused Ion Beam Milling Approach. Microscopy and Microanalysis. 2023;29: 1628. doi:10.1093/micmic/ozad078
Redjem W, Amsellem AJ, Allen FI, Benndorf G, Bin J, Bulanov S, Esarey E, Feldman LC, Ferrer Fernandez J, Garcia Lopez J, Geulig L, Geddes CR, Hijazi H, Ji Q, Ivanov V, Kanté B, Gonsalves A, Meijer J, Nakamura K, Persaud A, Pong I, Obst-Huebl L, Seidl PA, Simoni J, Schroeder C, Steinke S, Tan LZ, Wunderlich R, Wynne B, Schenkel T. Defect engineering of silicon with ion pulses from laser acceleration. Communications Materials. 2023;4: 1–10. doi:10.1038/s43246-023-00349-4
Jin L, Shi Y, Allen FI, Chen L-Q, Wu J. Probing the Critical Nucleus Size in the Metal-Insulator Phase Transition of VO2. Phys Rev Lett. 2022;129: 245701. doi:10.1103/PhysRevLett.129.245701
Kolasinski RD, Wong C-S, Engel A, Whaley JA, Allen FI, Buchenauer DA. Deciphering the influence of high-flux helium plasma exposure on tungsten nanostructure growth using real-time, in situ spectroscopic ellipsometry. J Appl Phys. 2022;131: 063303. doi:10.1063/5.0077458
Balooch M, Allen FI, Popovic MP, Hosemann P. Mechanical and structural transformations of tungsten implanted with helium ions. J Nucl Mater. 2022;559: 153436. doi:10.1016/j.jnucmat.2021.153436
Allen FI, Pekin TC, Persaud A, Rozeveld SJ, Meyers GF, Ciston J, Ophus C, Minor AM. Fast Grain Mapping with Sub-Nanometer Resolution Using 4D-STEM with Grain Classification by Principal Component Analysis and Non-Negative Matrix Factorization. Microsc Microanal. 2021;27: 794–803. doi:10.1017/S1431927621011946
Allen FI. A review of defect engineering, ion implantation, and nanofabrication using the helium ion microscope. Beilstein J Nanotechnol. 2021;12: 633–664. doi:10.3762/bjnano.12.52
Yang Y, Wang SY, Xiang B, Yin S, Pekin TC, Li X, Zhang R, Yano K, Hwang D, Asta M, Grigoropoulos CP, Minor AM. Evaluating the effects of pillar shape and gallium ion beam damage on the mechanical properties of single crystal aluminum nanopillars. J Mater Res. 2021;36: 2515–2528. doi:10.1557/s43578-021-00125-5
Velez NR, Allen FI, Jones MA, Donohue J, Li W, Pister K, Govindjee S, Meyers GF, Minor AM. Nanomechanical testing of freestanding polymer films: in situ tensile testing and Tg measurement. J Mater Res. 2021;36: 2456–2464. doi:10.1557/s43578-021-00163-z
Liu J, Jin L, Allen FI, Gao Y, Ci P, Kang F, Wu J. Selective Gas Permeation in Defect-Engineered Bilayer Graphene. Nano Lett. 2021;21: 2183–2190. doi:10.1021/acs.nanolett.0c04989
Allen FI. Branched High Aspect Ratio Nanostructures Fabricated by Focused Helium Ion Beam Induced Deposition of an Insulator. Micromachines (Basel). 2021;12. doi:10.3390/mi12030232
Velez NR, Allen FI, Jones MA, Govindjee S, Meyers GF, Minor AM. Extreme Ductility in Freestanding Polystyrene Thin Films. Macromolecules. 2020;53: 8650–8662. doi:10.1021/acs.macromol.0c01387
Jin L, Zeltmann SE, Choe HS, Liu H, Allen FI, Minor AM, Wu J. Disorder recovers the Wiedemann-Franz law in the metallic phase of VO2. Phys Rev B Condens Matter. 2020;102: 041120. doi:10.1103/PhysRevB.102.041120
Thayer RC, Allen FI, Patel NH. Structural color in Junonia butterflies evolves by tuning scale lamina thickness. Elife. 2020;9. doi:10.7554/eLife.52187
Allen FI, Hosemann P, Balooch M. Key mechanistic features of swelling and blistering of helium-ion-irradiated tungsten. Scr Mater. 2020;178: 256–260. doi:10.1016/j.scriptamat.2019.11.039
Holz M, Allen FI, Reuter C, Ahmad A, Hofmann M, Reum A, Ivanov Tsv, Rangelow IW. Tip-based electron beam induced deposition using active cantilevers. J Vac Sci Technol B. 2019;37: 061812. doi:10.1116/1.5123287
Choe HS, Prabhakar R, Wehmeyer G, Allen FI, Lee W, Jin L, . Ion Write Microthermotics: Programing Thermal Metamaterials at the Microscale. Nano Lett. 2019;19: 3830–3837. doi:10.1021/acs.nanolett.9b00984
Choe HS, Li J, Zheng W, Lee J, Suh J, Allen FI, Liu H, Choi HJ, Walukiewicz W, Zheng H, Wu J. Anomalously high electronic thermal conductivity and Lorenz ratio in Bi2Te3 nanoribbons far from the bipolar condition. Appl Phys Lett. 2019;114: 152101. doi:10.1063/1.5092221
Allen FI, Velez NR, Thayer RC, Patel NH, Jones MA, Meyers GF, Minor AM. Gallium, neon and helium focused ion beam milling of thin films demonstrated for polymeric materials: study of implantation artifacts. Nanoscale. 2019;11: 1403–1409. doi:10.1039/c8nr08224c
Ho SP, Chen L, Allen FI, Hsi RS, Shimotake AR, Wiener SV, Kang M, Minor AM, Stoller ML. Architecture-Guided Fluid Flow Directs Renal Biomineralization. Sci Rep. 2018;8: 14157. doi:10.1038/s41598-018-30717-x
Saremi S, Xu R, Allen FI, Maher J, Agar JC, Gao R, Hosemann P, Martin LW. Local control of defects and switching properties in ferroelectric thin films. Phys Rev Mater. 2018;2: 084414. doi:10.1103/PhysRevMaterials.2.084414
Archanjo BS, Vasconcelos TL, Oliveira BS, Song C, Allen FI, Achete CA, Ercius P. Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas. ACS Photonics. 2018;5: 2834–2842. doi:10.1021/acsphotonics.8b00125
Kim E, Lee Y, Ko C, Park Y, Yeo J, Chen Y, Choe HS, Allen FI, Rho J, Tongay S, Wu J, Kim K, Grigoropoulos CP. Tuning the optical and electrical properties of MoS2 by selective Ag photo-reduction. Appl Phys Lett. 2018;113: 013105. doi:10.1063/1.5022705
Allen FI, Kim E, Andresen NC, Grigoropoulos CP, Minor AM. In situ TEM Raman spectroscopy and laser-based materials modification. Ultramicroscopy. 2017;178: 33–37. doi:10.1016/j.ultramic.2016.06.011
Calafiore G, Koshelev A, Darlington TP, Borys NJ, Melli M, Polyakov A, Cantarella G, Allen FI, Lum P, Wong E, Sassolini S, Weber-Bargioni A, Schuck PJ, Cabrini S, Munechika K. Campanile Near-Field Probes Fabricated by Nanoimprint Lithography on the Facet of an Optical Fiber. Sci Rep. 2017;7: 1651. doi:10.1038/s41598-017-01871-5
In JB, Kwon H-J, Yoo J-H, Allen FI, Minor AM, Grigoropoulos CP. Laser welding of vertically aligned carbon nanotube arrays on polymer workpieces. Carbon. 2017;115: 688–693. doi:10.1016/j.carbon.2017.01.050
Tunuguntla RH, Chen X, Belliveau A, Allen FI, Noy A. High-Yield Synthesis and Optical Properties of Carbon Nanotube Porins. J Phys Chem C. 2017;121: 3117–3125. doi:10.1021/acs.jpcc.6b11658
Wang Z-J, Allen FI, Shan Z-W, Hosemann P. Mechanical behavior of copper containing a gas-bubble superlattice. Acta Mater. 2016;121: 78–84. doi:10.1016/j.actamat.2016.08.085
Pekin TC, Allen FI, Minor AM. Evaluation of neon focused ion beam milling for TEM sample preparation. J Microsc. 2016;264: 59–63. doi:10.1111/jmi.12416
Calafiore G, Koshelev A, Allen FI, Dhuey S, Sassolini S, Wong E, Lum P, Munechika K, Cabrini S. Nanoimprint of a 3D structure on an optical fiber for light wavefront manipulation. Nanotechnology. 2016;27: 375301. doi:10.1088/0957-4484/27/37/375301
Koshelev A, Calafiore G, Piña-Hernandez C, Allen FI, Dhuey S, Sassolini S, Wong E, Lum P, Munechika K, Cabrini S. High refractive index Fresnel lens on a fiber fabricated by nanoimprint lithography for immersion applications. Opt Lett. 2016;41: 3423–3426. doi:10.1364/OL.41.003423
Hong J, Hadjikhani A, Stone M, Allen FI, Safonov V, Liang P, Bokor J, Khizroev. The Physics of Spin-Transfer Torque Switching in Magnetic Tunneling Junctions in Sub-10 nm Size Range. IEEE Trans Magn. 2016;52: 1–4. doi:10.1109/TMAG.2016.2530622
Tunuguntla RH, Allen FI, Kim K, Belliveau A, Noy A. Ultrafast proton transport in sub-1-nm diameter carbon nanotube porins. Nat Nanotechnol. 2016;11: 639–644. doi:10.1038/nnano.2016.43
Ryu S, Kim E, Allen FI, Hwang DJ, Minor AM. Incubation behavior of silicon nanowire growth investigated by laser-assisted rapid heating. J Phys D Appl Phys. 2016. doi:10.1063/1.4961374
Guo C, Allen FI, Lee Y, Le TP, Song C, Ciston J, Minor AM, Gomez, ED. Probing local electronic transitions in organic semiconductors through energy-loss spectrum imaging in the transmission electron microscope. Adv Funct Mater. 2015;25: 6071–6076. doi:10.1002/adfm.201502090
Paeng D, Lee D, Yeo J, Yoo J-H, Allen FI, Kim E, So H, Park HK, Minor AM, Grigoropoulos CP. Laser-Induced Reductive Sintering of Nickel Oxide Nanoparticles under Ambient Conditions. J Phys Chem C. 2015;119: 6363–6372. doi:10.1021/jp512776p
Allen FI, Comolli LR, Kusoglu A, Modestino MA, Minor AM, Weber AZ. Morphology of Hydrated As-Cast Nafion Revealed through Cryo Electron Tomography. ACS Macro Lett. 2015;4: 1–5. doi:10.1021/mz500606h
Geng J, Kim K, Zhang J, Escalada A, Tunuguntla R, Comolli LR, Allen FI, Shnyrova AV, Cho KR, Munoz D, Wang YM, Grigoropoulos CP, Ajo-Franklin CM, Noy A. Stochastic transport through carbon nanotubes in lipid bilayers and live cell membranes. Nature. 2014;514: 612–615. doi:10.1038/nature13817
Lee D, Rho Y, Allen FI, Minor AM, Ko SH, Grigoropoulos CP. Synthesis of hierarchical TiO2 nanowires with densely-packed and omnidirectional branches. Nanoscale. 2013;5: 11147–11152. doi:10.1039/c3nr02584e
Waldmann O, Persaud A, Kapadia R, Takei K, Allen FI, Javey A, Schenkel T. Effects of palladium coating on field-emission properties of carbon nanofibers in a hydrogen plasma. Thin Solid Films. 2013;534: 488–491. doi:10.1016/j.tsf.2013.02.053
Modestino MA, Paul DK, Dishari S, Petrina SA, Allen FI, Hickner MA, Karan K, Segalman RA, Weber AZ. Self-Assembly and Transport Limitations in Confined Nafion Films. Macromolecules. 2013;46: 867–873. doi:10.1021/ma301999a
Allen FI, Ercius P, Modestino MA, Segalman RA, Balsara NP, Minor AM. Deciphering the three-dimensional morphology of free-standing block copolymer thin films by transmission electron microscopy. Micron. 2013;44: 442–450. doi:10.1016/j.micron.2012.09.010
Watanabe M, Allen FI. The SmartEFTEM-SI method: Development of a new spectrum-imaging acquisition scheme for quantitative mapping by energy-filtering transmission electron microscopy. Ultramicroscopy. 2012;113: 106–119. doi:10.1016/j.ultramic.2011.10.014
Allen FI, Watanabe M, Lee Z, Balsara NP, Minor AM. Chemical mapping of a block copolymer electrolyte by low-loss EFTEM spectrum-imaging and principal component analysis. Ultramicroscopy. 2011;111: 239–244. doi:10.1016/j.ultramic.2010.11.035
Allen FI, Biedermann C, Radtke R, Fussmann G, Fritzsche S. Energy dependence of angular momentum capture states in charge exchange collisions between slow highly charged argon ions and argon neutrals. Phys Rev A. 2008;78: 032705. doi:10.1103/PhysRevA.78.032705
Allen FI, Biedermann C, Radtke R, Fussmann G. Charge exchange of highly charged argon ions as a function of projectile energy. J Phys Conf Ser. 2007;58: 188. doi:10.1088/1742-6596/58/1/038
Allen FI, Persaud A, Park SJ, Minor A, Sakurai M, Schneider DH, Schenkel T. Transport of multiply and highly charged ions through nanoscale apertures in silicon nitride membranes. Nucl Instrum Methods Phys Res B. 2006;244: 323–326. doi:10.1016/j.nimb.2005.10.029
Allen FI, Biedermann C, Radtke R, Fussmann G. Extraction of highly charged ions from the Berlin Electron Beam Ion Trap for interactions with a gas target. Rev Sci Instrum. 2006;72: 03B903. doi:10.1063/1.2162847
Persaud A, Allen FI, Gicquel F, Park SJ, Liddle JA, Schenkel T, Ivanov Tzv, Ivanova K, Rangelow, IW, Bokor, J. Single ion implantation with scanning probe alignment. J Vac Sci Technol B. 2004;22: 2992–2994. doi:10.1116/1.1802891
Park SJ, Liddle JA, Persaud A, Allen FI, Bokor J, Schenkel T. Formation of 15nm scale coulomb blockade structures in silicon by electron beam lithography with a bilayer resist process. J Vac Sci Technol B. 2004;22: 3115. doi:10.1116/1.1825012
Persaud A, Park SJ, Liddle JA, Rangelow IW, Bokor J, Keller R, Allen FI, Schneider DH, Schenkel T. Quantum Computer Development with Single Ion Implantation. Quantum Inf Process. 2004;3: 233–245. doi:10.1007/s11128-004-3879-1