Please use this identifier to cite or link to this item:
Volltext verfügbar? / Dokumentlieferung
doi:10.22028/D291-33147
Files for this record:
There are no files associated with this item.
Title: | A MACEing silicon: Towards single-step etching of defined porous nanostructures for biomedicine |
Author(s): | Alhmoud, Hashim Brodoceanu, Daniel Elnathan, Roey Kraus, Tobias ![]() Voelcker, Nicolas H. |
Language: | English |
In: | |
Title: | Progress in materials science |
Volume: | 116 |
Publisher/Platform: | Elsevier |
Year of Publication: | 2021 |
Publikation type: | Journal Article |
Abstract: | Metal-assisted chemical etching (MACE) affords porous silicon nanostructures control over size, shape, and porosity in a single step. Simplicity and flexibility are potential advantages over more traditional silicon bulk micromachining techniques. MACE-generated porous micro- and nanostructures are suitable as biomaterials through their length scales and biocompatibility. This work provides a comprehensive overview of the MACE reaction mechanism that yields biomedically relevant silicon nanostructures – from nanowires, nanopillars, to sub-micrometer holes and pores. We discuss their biomedical applications in biosensors, cell capture and transfection arrays, and drug delivery vectors. We assess the reported benefits of the various nanostructures and discuss whether MACE provides clear and distinct advantages over other techniques. The flexibility and simplicity of MACE comes at a cost. The reaction parameters are many and inter-related, and we lack a full model of the etching mechanism. While the cathode reaction is well understood, the anode reaction involving dissolution of the silicon remains controversial. Such uncertainties impede rational design of specific structures that address biomedical requirements. We summarize current understanding to provide design guidelines for structures used in biomedicine and review the effects of key parameters on the morphological attributes of the etched features. |
DOI of the first publication: | 10.1016/j.pmatsci.2019.100636 |
URL of the first publication: | https://www.sciencedirect.com/science/article/abs/pii/S0079642519301185 |
Link to this record: | hdl:20.500.11880/30466 http://dx.doi.org/10.22028/D291-33147 |
ISSN: | 1873-2208 0048-5500 |
Date of registration: | 27-Jan-2021 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Chemie |
Professorship: | NT - Prof. Dr. Tobias Kraus |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Items in SciDok are protected by copyright, with all rights reserved, unless otherwise indicated.