title: Thermoporometry characterization of silica microparticles and nanowires.
abstract: We present the results of a systematic study on the porosity of silica microparticles and nanowires prepared by glancing angle deposition-metal-assisted chemical etching (GLAD-MACE) and interference lithography-metal-assisted chemical etching (IL-MACE) techniques using the thermoporometry (TPM) method. Good agreement was obtained between our TPM results and published data provided by the suppliers of silica microparticles. TPM characterization of the GLAD-MACE and IL-MACE nanowires was carried out on the basis of parameters obtained from TPM experiments on microparticles. Our nanowires showed a similar trend but lower values of the pore volume and surface area than nanowires prepared by MACE with AgNO3 solution. We attribute the enhanced bioanalysis performance of the GLAD-MACE nanowires based devices to the increased pore volume and total surface area of the nanowires.
authors: NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , Singapore 117456.
authors: Jiaxin
authors: J
authors: Wu
authors: Han
authors: H
authors: Zheng
authors: He
authors: H
authors: Cheng
authors: L
authors: L
authors: Zhou
authors: K C
authors: KC
authors: Leong
authors: R
authors: R
authors: Rajagopalan
authors: H P
authors: HP
authors: Too
authors: W K
authors: WK
authors: Choi
mesh_terms: D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D012822:Silicon Dioxide / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012822:Silicon Dioxide; D012835:Silver Nitrate