Multiprobe NSOM fluorescence

Nanophotonics

article

Shirly Berezin¹  Basanth S. Kalanoor²  Hesham Taha³  Yuval Garini¹  Yaakov R. Tischler² 

[1] Bar-Ilan Institute of Nanotechnology and Advanced Materials, and Department of Physics, Bar-Ilan University;Bar-Ilan Institute of Nanotechnology and Advanced Materials, and Department of Chemistry, Bar-Ilan University;Nanonics Imaging Ltd.

关键词: multiprobe;    NSOM;    SPM;    lumogen;    FRET;    tuning fork probe;   

DOI  :  10.1515/nanoph-2014-0008

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

In this paper, we demonstrate simultaneous AFM/NSOM using a dual-tip normal tuning-fork based scanning probe microscope. By scanning two SPM probes simultaneously, one dedicated for AFM with a standard tip diameter of 20 nm, and the second having a 150 nm aperture NSOM fiber with 200 nm thick gold coating, we combine the benefits of ∼20 nm spatial resolution from the AFM tip with the spectral information of a near-field optical probe. The combination of simultaneous dual-tip scanning enables us to decouple the requirements for high resolution topography and probe functionality. Our method represents a marked shift from previous applications of multi-probe SPM where essentially a pump-probe methodology is implemented in which one tip scans the area around the second. As a model system, we apply dual-tip AFM/NSOM scanning to a sample of spin-cast nano-clustered Lumogen dyes, which show remarkable brightness and photochemical stability. We observe morphology features with a resolution of 20 nm, and a near-field optical resolution of 150 nm, validating our approach.

【 授权许可】

CC BY