{'fraction_non_alphanumeric': 0.03527481542247744, 'fraction_numerical': 0.004922067268252666, 'mean_word_length': 5.354166666666667, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Tailored Microcrystal Growth: A Facile Solution‐Phase Synthesis of Gold Rings

Hollow metallic nanoand microsystems (i.e., cages, frames, rings, and shells) represent an area of intense research interest because of their unique morphologies and applications ranging from diagnostics to therapeutics. [ 1 ] There are now a variety of strategies for solution-phase synthesis of hollow spheres, cubes, frames (i.e., rings), and rods. [ 2 , 3 ] In particular, Xia and co-workers have utilized a galvanic replacement reaction to epitaxially deposit Au on Ag nanostructures and to hollow the resultant substructure by oxidation, leaving a Au nanostructure. [ 3 ] Although the galvanic exchange reaction is an interesting synthetic method to achieve hollow nanostructures, this method requires preforming the Ag template structure prior to deposition and oxidation. More importantly, two or more components with differing reduction potentials must be used, and technically, it has not been easy to obtain completely pure Au hollow nanostructures with complete oxidation (removal) of the other components. Amphiphilic polymeric surfactants have been used as structure directing agents to prepare 3D mesoporous structures. [ 4 ]