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利用磁力显微镜对单个磁性纳米粒子的磁矩进行定量测量。

Quantitative measurement of the magnetic moment of individual magnetic nanoparticles by magnetic force microscopy.

机构信息

Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.

出版信息

Small. 2012 Sep 10;8(17):2675-9. doi: 10.1002/smll.201200420. Epub 2012 Jun 22.

DOI:10.1002/smll.201200420
PMID:22730177
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3561699/
Abstract

The quantitative measurement of the magnetization of individual magnetic nanoparticles (MNPs) using magnetic force microscopy (MFM) is described. Quantitative measurement is realized by calibration of the MFM signal using an MNP reference sample with traceably determined magnetization. A resolution of the magnetic moment of the order of 10(-18) A m(2) under ambient conditions is demonstrated, which is presently limited by the tip's magnetic moment and the noise level of the instrument. The calibration scheme can be applied to practically any magnetic force microscope and tip, thus allowing a wide range of future applications, for example in nanomagnetism and biotechnology.

摘要

本文描述了使用磁力显微镜（MFM）对单个磁性纳米粒子（MNPs）的磁化进行定量测量的方法。通过使用具有可追溯确定磁化的 MNPs 参考样品对 MFM 信号进行校准，实现了定量测量。在环境条件下，演示了分辨率约为 10(-18) A m(2)的磁矩，目前该分辨率受到探针磁矩和仪器噪声水平的限制。该校准方案可应用于几乎任何磁力显微镜和探针，因此可以实现广泛的未来应用，例如在纳米磁学和生物技术中。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/41580c4ac9ca/smll0008-2675-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/6c27cbf33817/smll0008-2675-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/e79bae1e35ec/smll0008-2675-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/7c6b8c346ae1/smll0008-2675-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/41580c4ac9ca/smll0008-2675-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/6c27cbf33817/smll0008-2675-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/e79bae1e35ec/smll0008-2675-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/7c6b8c346ae1/smll0008-2675-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce07/3561699/41580c4ac9ca/smll0008-2675-f4.jpg

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本文引用的文献

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Measuring spectroscopy and magnetism of extracted and intracellular magnetosomes using soft X-ray ptychography.使用软X射线叠层成像术测量提取的和细胞内磁小体的光谱学和磁性。
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Removal of electrostatic artifacts in magnetic force microscopy by controlled magnetization of the tip: application to superparamagnetic nanoparticles.通过控制针尖磁化去除磁力显微镜中的静电伪像：应用于超顺磁性纳米颗粒
Sci Rep. 2016 May 19;6:26293. doi: 10.1038/srep26293.
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Magnetic Properties of Strontium Hexaferrite Nanostructures Measured with Magnetic Force Microscopy.用磁力显微镜测量的六方锶铁氧体纳米结构的磁性
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Magnetic force microscopy: quantitative issues in biomaterials.磁力显微镜：生物材料中的定量问题。
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