Article
Chemistry, Physical
Mohammed K. Abdel-Rahman, Patrick M. Eckhert, D. Howard Fairbrother
Summary: Ion-beam-induced deposition using Me3PtCpMe was studied through a combination of UHV surface science research and SEM data. The experiments showed that ion-induced deposition reaction cross sections are approximately two orders of magnitude greater, resulting in deposits with PtC5 stoichiometry. Ion-induced deposition also led to bimolecular methyl radical coupling to produce ethane.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Utkarsh Anand, Tanmay Ghosh, Zainul Aabdin, Siddardha Koneti, XiuMei Xu, Frank Holsteyns, Utkur Mirsaidov
Summary: Researchers have found that the wetting process of water on a surface patterned with a dense array of nanopillars occurs in two stages: first, an ultra-thin precursor water film forms on the surface, and then capillary action by the nanopillars pulls the water, increasing the overall thickness of the water film.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Nanoscience & Nanotechnology
Jo-Chi Yu, Mohammed K. Abdel-Rahman, D. Howard Fairbrother, Lisa McElwee-White
Summary: FEBID and FIBID are direct-write fabrication techniques using focused beams of charged particles. Ultra high vacuum surface science studies provide mechanistic information on electron and ion-induced processes, aiding in the design of custom precursors for these techniques. Minimizing contamination in nanostructures is crucial for many applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Wenqi Zhang, Peidong Chao, Donglei Chen, Zhan Yang, Lixin Dong
Summary: A hybrid core-shell structured nanowire is proposed for a long-term stable electron source based on an isolated platinum/multi-walled carbon nanotube (Pt/MWCNT). The hybrid nanowire is prepared by growing a Pt shell on a metallic MWCNT through a field-emission-induced deposition (FEID) method. It demonstrates good stability and tolerance to poor working conditions, with a lifetime hundreds of times longer than that of the pristine bare MWCNT.
Article
Multidisciplinary Sciences
Marc Hanefeld, Peter Gruszka, Michael Huth
Summary: Nano-granular metals, specifically nano-granular Platinum with Pt nano-grains embedded in amorphous carbon, exhibit frequency-dependent conductivity dominated by temperature-dependent tunneling effects. The study focuses on the transport regime before the insulator metal transition, where polarization contributions are small and correlation effects in free charge transport are pronounced. The findings reveal a universal behavior in frequency dependence, contrasting with previous research on nano-granular metals in weak coupling regimes, with potential applications in impedance spectroscopy of dielectric materials.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Angus Gale, Johannes E. Froch, Mehran Kianinia, James Bishop, Igor Aharonovich, Milos Toth
Summary: The study introduces a method called recoil implantation, which successfully fabricates nitrogen-vacancy color centers in diamond using gas-phase precursors. This approach expands the applicability of recoil implantation to a larger portion of the periodic table and practical applications where thin film deposition/removal is impractical.
Article
Chemistry, Physical
Deepa Thakur, Pawan Kumar, Arjun Barwal, Deep Jariwala, Erich Stach, Viswanath Balakrishnan
Summary: We present a method of selectively tuning the optical properties of 2D materials by using electron-beam induced deposition to create patterned carbon nanostructures on materials such as WS2 and MoS2. The size and intensity of the patterns can be controlled by adjusting the e-beam parameters. We demonstrate optical encryption by integrating carbon structures to modulate the optical emission of WS2.
Article
Chemistry, Multidisciplinary
Sergi Plana-Ruiz, Alejandro Gomez-Perez, Monika Budayova-Spano, Daniel L. Foley, Joaquim Portillo-Serra, Edgar Rauch, Evangelos Grivas, Dominique Housset, Partha Pratim Das, Mitra L. Taheri, Stavros Nicolopoulos, Wai Li Ling
Summary: Structural characterization is crucial for understanding protein function. Though electron crystallography can be performed on nanometer-sized crystals and provide additional information, its widespread use has been limited due to the fragility of such crystals. This work demonstrates a methodology to preserve these nanocrystals in their natural environment at room temperature for electron diffraction experiments.
Article
Nanoscience & Nanotechnology
Alexey Prosvetov, Alexey V. Verkhovtsev, Gennady Sushko, Andrey Solov'yov
Summary: This paper presents a detailed computational protocol for atomistic simulation of the formation and growth of metal-containing nanostructures during FEBID, providing valuable insights into the fundamental mechanisms of electron-induced precursor fragmentation and nanostructure formation. The developed methodology is general and can be adjusted for different precursor molecules and nanofabrication techniques. Simulation results offer valuable reference data for experimental characterization of nanostructures grown by FEBID.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2021)
Article
Optics
Ali Kamali, Will G. Carden, Jodie V. Johnson, Lisa McElwee-White, O. Ingolfsson
Summary: Appreciable effort is being made to design suitable organometallic precursors for metallic nanostructure fabrication using focused electron beam induced deposition (FEBID), which has great potential for 3D patterning. The initial interaction of the potential precursor with low energy electrons is crucial for determining the composition of the resulting deposits. This study explores the low energy electron-induced fragmentation of CF3AuCNC(CH3)(3) in the gas phase and compares it with the composition of deposits formed under FEBID conditions.
EUROPEAN PHYSICAL JOURNAL D
(2023)
Article
Nanoscience & Nanotechnology
Takashi Masuda, Masahiro Mori
Summary: This study synthesized liquid Si as a precursor for fabricating Si devices, achieving the conversion from liquid to solid Si without heating and directly depositing size-controllable Si nanodots through liquid-phase electron-beam-induced deposition. The processing resolution of this technique is potentially 1 nm or less, allowing for direct writing of Si nanostructures with minimal contamination compared to typical techniques.
Article
Nanoscience & Nanotechnology
John Lasseter, Philip D. Rack, Steven J. Randolph
Summary: In this study, a method for selectively depositing 3D nanostructures using photothermal transport is reported. The ability to initiate the process on sub-diffraction-limit nanoscale features is demonstrated. Thermal simulations show that the geometric shape and optical and thermal properties of the nanostructures are crucial for controlling the CVD reaction.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Jian Xu, Shang Yang, Yayi Wei
Summary: This paper demonstrates a simple method for correcting the proximity effect (PEC) by modifying the point spread function (PSF) and iteratively solving for the optimum incident dose. The results show a significant reduction in line width deviation and improved critical dimension (CD) uniformity.
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Masaki Takeguchi, Xiaoguang Li, Kazutaka Mitsuishi
Summary: The dynamics of Pt nanoparticles in water were observed by high-resolution scanning transmission electron microscopy. At low dose rates, Pt nanoparticles with a diameter smaller than 2 nm exhibit slow motion, attachment, and detachment behavior. The increase in dose rate leads to particle aggregation and the formation of chain network structures.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Shaozhong Ou, Jianguo Wang, Yuan'an Zhao, Xiaofeng Liu, Zhichang Mo, Kun Wang, Chunxian Tao
Summary: This paper presents a comparative study on the optical, morphological, and laser-induced damage characteristics of rubbed polyimide, SiO2 thin films by glancing angle deposition, and the corresponding liquid crystal (LC) retarders. The results show that the SiO2 thin films have good transmittance and resistance to laser damage, with transmittance above 92% in the wavelength range of 400-1200 nm. The laser-induced damage threshold of SiO2 thin films is 32.6 J/cm(2), surpassing that of traditional polyimide (PI) alignment films.
MODERN PHYSICS LETTERS B
(2023)
