Highly ordered silicon nanorod（Si NR） arrays with controllable geometry are fabricated via nanosphere lithography and metal-assisted chemical etching. It is demonstrated that the key to achieving a high-quality meta...Highly ordered silicon nanorod（Si NR） arrays with controllable geometry are fabricated via nanosphere lithography and metal-assisted chemical etching. It is demonstrated that the key to achieving a high-quality metal mask is to construct a non-close-packed template that can be removed with negligible damage to the mask. Hydrophobicity of Si NR arrays of different geometries is also studied. It is shown that the nanorod structures are effectively quasi-hydrophobic with a contact angle as high as 142°, which would be useful in self-cleaning nanorod-based device applications.展开更多
One-dimensional silicon nanorod（Si NR） has attracted considerable interest because of its unique morphology and electronic-optical properties that render Si NRs suitable for a broad spectrum of applications, such as...One-dimensional silicon nanorod（Si NR） has attracted considerable interest because of its unique morphology and electronic-optical properties that render Si NRs suitable for a broad spectrum of applications, such as fieldeffect transistor, drug carrier, solar cell, nanomechanical device, and lithium-ion battery. However, studies aiming to identify a new synthetic method and apply Si NR in the biomedical field remain limited. This study is the first to use an ethylene glycol-mediated synthetic route to prepare Si NR as a multicolor fluorescent probe and a new photodynamic therapy（PDT） agent. The as-prepared Si NR demonstrates bright fluorescence, excellent storage and photostability, favorable biocompatibility, excitation-dependent emission, and measurable quantity of-1O2（0.24）. On the basis of these features,we demonstrate through in vitro studies that the Si NR can be utilized as a new nanophotosensitizer for fluorescence imaging-guided cancer treatment. Our work leads to a new production process for Si NRs that can be used not only as PDT agents for therapy of shallow tissue cancer but also as excellent, environment-friendly, and red light-induced photocatalysts for the degradation of persistent organic pollutants in the future.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.51272246)the Scientific and Technological Research Foundation of Anhui Province,China(Grant No.12010202035)
文摘Highly ordered silicon nanorod（Si NR） arrays with controllable geometry are fabricated via nanosphere lithography and metal-assisted chemical etching. It is demonstrated that the key to achieving a high-quality metal mask is to construct a non-close-packed template that can be removed with negligible damage to the mask. Hydrophobicity of Si NR arrays of different geometries is also studied. It is shown that the nanorod structures are effectively quasi-hydrophobic with a contact angle as high as 142°, which would be useful in self-cleaning nanorod-based device applications.
基金supported by the National NaturalScience Foundation of China (51472252 and 51572269)the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB17030400)
文摘One-dimensional silicon nanorod（Si NR） has attracted considerable interest because of its unique morphology and electronic-optical properties that render Si NRs suitable for a broad spectrum of applications, such as fieldeffect transistor, drug carrier, solar cell, nanomechanical device, and lithium-ion battery. However, studies aiming to identify a new synthetic method and apply Si NR in the biomedical field remain limited. This study is the first to use an ethylene glycol-mediated synthetic route to prepare Si NR as a multicolor fluorescent probe and a new photodynamic therapy（PDT） agent. The as-prepared Si NR demonstrates bright fluorescence, excellent storage and photostability, favorable biocompatibility, excitation-dependent emission, and measurable quantity of-1O2（0.24）. On the basis of these features,we demonstrate through in vitro studies that the Si NR can be utilized as a new nanophotosensitizer for fluorescence imaging-guided cancer treatment. Our work leads to a new production process for Si NRs that can be used not only as PDT agents for therapy of shallow tissue cancer but also as excellent, environment-friendly, and red light-induced photocatalysts for the degradation of persistent organic pollutants in the future.
