Magnetically Assembled Ni@Ag Urchin‐Like Ensembles with Ultra‐Sharp Tips and Numerous Gaps for SERS Applications

[email protected] urchin-like assemblies are synthesized. The tips of these products are as tiny as 10 nm, arm apex angles are 39°, and a large amount of “crossing areas” between urchin-like particles are produced due to peculiar magnetically induced assembling. These advantages make them powerful SERS probes for chemical and biological analyses. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.