کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8037892 | 1518314 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mapping the electrostatic potential of Au nanoparticles using hybrid electron holography
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کلمات کلیدی
MIPHRTEMAuNPs - AuNP هاTem - این استMean inner potential - متوسط پتانسیل درونیTransmission electron microscope - میکروسکوپ الکترونی انتقالhigh-resolution transmission electron microscope - میکروسکوپ الکترونی با وضوح بالا با وضوح بالاNanoparticles - نانوذراتGold nanoparticles - نانوذرات طلاoff-axis electron holography - هولوگرافی الکترونی خارج از محور
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Mapping the electrostatic potential of Au nanoparticles using hybrid electron holography Mapping the electrostatic potential of Au nanoparticles using hybrid electron holography](/preview/png/8037892.png)
چکیده انگلیسی
Electron holography is a powerful technique for characterizing electrostatic potentials, charge distributions, electric and magnetic fields, strain distributions and semiconductor dopant distributions with sub-nm spatial resolution. Mapping internal electrostatic and magnetic fields within nanoparticles and other low-dimensional materials by TEM requires both high spatial resolution and high phase sensitivity. Carrying out such an analysis fully quantitatively is even more challenging, since artefacts such as dynamical electron scattering may strongly affect the measurement. In-line electron holography, one of the variants of electron holography, features high phase sensitivity at high spatial frequencies, but suffers from inefficient phase recovery at low spatial frequencies. Off-axis electron holography, in contrast, can recover low spatial frequency phase information much more reliably, but is less effective in retrieving phase information at high spatial frequencies when compared to in-line holography. We investigate gold nanoparticles using hybrid electron holography at both atomic-resolution and intermediate magnification. Hybrid electron holography is a novel technique that synergistically combines off-axis and in-line electron holography, allowing the measurement of the complex wave function describing the scattered electrons with excellent signal-to-noise properties at both high and low spatial frequencies. The effect of dynamical electron scattering is minimized by beam tilt averaging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 165, June 2016, Pages 8-14
Journal: Ultramicroscopy - Volume 165, June 2016, Pages 8-14
نویسندگان
Cigdem Ozsoy-Keskinbora, Chris B. Boothroyd, Rafal E. Dunin-Borkowski, Peter A. van Aken, Christoph T. Koch,