⊥Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States.
¶Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States.
Nano Lett. 2015 May 13;15(5):3383-90. doi: 10.1021/acs.nanolett.5b00716. Epub 2015 Apr 9.
We demonstrate a new nanoimaging platform in which optical excitations generated by a low-energy electron beam in an ultrathin scintillator are used as a noninvasive, near-field optical scanning probe of an underlying sample. We obtain optical images of Al nanostructures with 46 nm resolution and validate the noninvasiveness of this approach by imaging a conjugated polymer film otherwise incompatible with electron microscopy due to electron-induced damage. The high resolution, speed, and noninvasiveness of this "cathodoluminescence-activated" platform also show promise for super-resolution bioimaging.
我们展示了一种新的纳米成像平台，其中利用超薄膜中的低能电子束产生的光学激发作为一种非侵入性的、近场光学扫描探针来探测下方的样品。我们获得了分辨率为 46nm 的 Al 纳米结构的光学图像，并通过对由于电子诱导损伤而与电子显微镜不兼容的共轭聚合物膜进行成像，验证了这种方法的非侵入性。这种“电子激发发光激活”平台的高分辨率、速度和非侵入性也为超分辨率生物成像带来了希望。
