title: Mesoporous gold sponges: electric charge-assisted seed mediated synthesis and application as surface-enhanced Raman scattering substrates.
abstract: Mesoporous gold sponges were prepared using 4-dimethylaminopyridine (DMAP)-stabilized Au seeds. This is a general process, which involves a simple template-free method, room temperature reduction of HAuCl4·4H2O with hydroxylamine. The formation process of mesoporous gold sponges could be accounted for the electrostatic interaction (the small Au nanoparticles (~3 nm) and the positively charged DMAP-stabilized Au seeds) and Ostwald ripening process. The mesoporous gold sponges had appeared to undergo electrostatic adsorption initially, sequentially linear aggregation, welding and Ostwald ripening, then, they randomly cross link into self-supporting, three-dimensional networks with time. The mesoporous gold sponges exhibit higher surface area than the literature. In addition, application of the spongelike networks as an active material for surface-enhanced Raman scattering has been investigated by employing 4-aminothiophenol (4-ATP) molecules as a probe.
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621900, China.|Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Zao
authors.initials: Z
authors.lastname: Yi
authors.affiliation: Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Jiangshan
authors.initials: J
authors.lastname: Luo
authors.affiliation: Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Xiulan
authors.initials: X
authors.lastname: Tan
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621900, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yi
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621900, China.
authors.forename: Weitang
authors.initials: W
authors.lastname: Yao
authors.affiliation: Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Kang
authors.affiliation: Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Ye
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621900, China.
authors.forename: Wenkun
authors.initials: W
authors.lastname: Zhu
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621900, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Duan
authors.affiliation: College of Physics and Electronics, Central South University, Changsha 410083, China.
authors.forename: Yougen
authors.initials: Y
authors.lastname: Yi
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621900, China.|Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Yongjian
authors.initials: Y
authors.lastname: Tang