title: Facile assembly of oppositely charged silver sulfide nanoparticles into photoluminescent mesoporous nanospheres.
abstract: Inorganic mesoporous materials have been attracting increasing attention during the past decade. In the present work, photoluminescent Ag2S nanospheres with mesoporous structures were prepared by assembling Ag2S nanoparticles with opposite charges in aqueous phase. Without structure-directing templates, mesoporous Ag2S with well-ordered face-centered cubic superlattice structures and high specific surface area was obtained. The mesoporous Ag2S nanospheres had the same crystal phase as their precursors Ag2S nanoparticles. Different from their near-infrared emitting precursors, the mesoporous Ag2S nanospheres exhibited cyan emission under ultraviolet excitation. The large number of sulfur-related defects existing in the mesostructures is most likely responsible for the photoluminescence. This work provides new insights into fabricating photoluminescent mesostructured materials via scale-up strategy.
authors.affiliation: †Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine, Ministry of Education, Collaborative Innovation Center of Systems Biomedicine, and Bio-ID Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China.
authors.forename: Lianjiang
authors.initials: L
authors.lastname: Tan
authors.forename: Shuiping
authors.initials: S
authors.lastname: Liu
authors.affiliation: †Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine, Ministry of Education, Collaborative Innovation Center of Systems Biomedicine, and Bio-ID Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China.
authors.forename: Qinglai
authors.initials: Q
authors.lastname: Yang
authors.affiliation: †Shanghai Center for Systems Biomedicine, Key Laboratory of Systems Biomedicine, Ministry of Education, Collaborative Innovation Center of Systems Biomedicine, and Bio-ID Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai 200240, China.
authors.forename: Yumei
authors.initials: Y
authors.lastname: Shen
mesh_terms: D053758:Nanoparticles / Q000737:chemistry*; D054118:Nanospheres / Q000737:chemistry*; D018030:Silver Compounds / Q000737:chemistry*
chemical_list: D018030:Silver Compounds; C013251:silver sulfide