You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Chemical"].

Please return the output as a JSON object of the format: {"Chemical": ["Arsenic", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Evaporation-Induced Coating of Hydrous Ruthenium Oxide on Mesoporous Silica Nanoparticles to Develop High-Performance Supercapacitors. An efficient evaporation-induced coating method combining microwave-assisted hydrothermal transformation and annealing is developed to fabricate an ideal electrode material from composites with a layer of hydrous RuO2 on mesoporous silica nanoparticles (MSNs), for a high-performance supercapacitor. Total and RuO2 -based specific capacitances are as high as 1125 and 2000 F g(-1) , respectively.
{"Chemical": ["RuO2", "Hydrous Ruthenium Oxide", "hydrous RuO2", "silica", "Silica"]}