Patterned porous silicon photonic crystals with modular surface chemistry for spatial control of neural stem cell differentiation

Huang, Tiffany; Pei, Yutao; Zhang, Douglas; Li, Yanfen; Kilian, Kristopher A.

doi:10.1039/c5nr08327c

Cited by 14 publications

(8 citation statements)

References 43 publications

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“…Indeed, the patterning of BFs themselves can be of interest for the precise patterning of polymer films or materials to generate controlled templates by the BF method. − Potential applications are textured surfaces, , responsive surfaces, filtration, or catalysis . Patterned BFs could also find utilizations in patterned chemistry for biomedical utilizations, , in aqueous media. For the generation of a controlled BF pattern, 0.2 μL of water droplets was deposited on a silicon wafer surface in the shape of a ring, then condensation was performed after complete evaporation.…”

Section: Resultsmentioning

confidence: 99%

Memory Re-Condensation

2023

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This paper reveals a phenomenon of memory in dropwise condensation in open air. After a first condensation process and complete evaporation of the condensed droplets, further condensations proceed with droplets nucleating at the very places where former droplets evaporated. The origin of this phenomenon is due to the incorporation of airborne salts during the first droplet condensation and its further concentration during droplet evaporation. Salts act as preferential nucleation sites and humidity sinks. The potential impact of this phenomenon on controlled breath figure patterns and plant metabolism is discussed.

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Section: Resultsmentioning

confidence: 99%

Memory Re-Condensation

2023

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“…For example, their long-range ordered structures provide a stable code that can direct the growth of nerve cells according to changes in the refractive index. Huang et al presented that lithographically patterned microporous silicon photonic crystals, which are functionalized with different bioactive peptide-doped surfaces, could be used as a spatial guidance for NSC differentiation and that NSCs can be spatially specified to suffer astrogenesis or neurogenesis as a multifunction of peptide identity as well as surface properties [58]. In addition, these crystals have found applications in the field of biomedical optics, and it has been shown that adsorbing proteins to the surface of a photonic crystal changes the refractive index which can be used to detect neurotransmitters and neural markers.…”

Section: The Application Of Photonic Crystals In Neuroengineeringmentioning

confidence: 99%

Designs of Biomaterials and Microenvironments for Neuroengineering

et al. 2018

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Recent clinical research on neuroengineering is primarily focused on biocompatible materials, which can be used to provide electroactive and topological cues, regulate the microenvironment, and perform other functions. Novel biomaterials for neuroengineering have been received much attention in the field of research, including graphene, photonic crystals, and organ-on-a-chip. Graphene, which has the advantage of high mechanical strength and chemical stability with the unique electrochemical performance for electrical signal detection and transmission, has significant potential as a conductive scaffolding in the field of medicine. Photonic crystal materials, known as a novel concept in nerve substrates, have provided a new avenue for neuroengineering research because of their unique ordered structure and spectral attributes. The “organ-on-a-chip” systems have shown significant prospects for the developments of the solutions to nerve regeneration by mimicking the microenvironment of nerve tissue. This paper presents a review of current progress in the designs of biomaterials and microenvironments and provides case studies in developing nerve system stents upon these biomaterials. In addition, we compose a conductive patterned compounded biomaterial, which could mimic neuronal microenvironment for neuroengineering by concentrating the advantage of such biomaterials.

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“…The last two decades have witnessed the increasing application of PSi in drug delivery, bio‐imaging, bio‐sensing, tissue engineering, and immunotherapy [11,12]. In addition, PSi has been widely used in many fields including optoelectronic devices [13,14], chemical sensors [15–18], energy conversion and storage [19–24], etc.…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon Fabrication and Surface Cracking Behavior Research Based on Anodic Electrochemical Etching^▴

Yang

Chen

et al. 2020

Fuel Cells

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Porous silicon (PSi) was fabricated based on anodic electrochemical etching, and the relationship between preparation conditions, nanostructure and PSi surface crack behavior were systematically studied. The effects of silicon wafer resistivity (doping concentration), etching time, and etching current density on nanostructure of PSi were investigated. Results indicated that lower resistivity was beneficial to etching process and led to higher porosity with uniform nano‐channels, and surface crack was more intense during drying process. Thickness and porosity of the porous layer are both initially increased and then decreased with increasing etching time. Direction of capillary stress depended on pore geometry, which further affected crack shape (shrinkage or crimp) of surface layer of PSi. Cracking extent was controlled by porosity, that the surface cracking layer began to peel off when the porosity exceeded 70%. Finally, a geometry and porosity‐controlled model was proposed to describe the cracking behaviors of PSi surface layer.

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Patterned porous silicon photonic crystals with modular surface chemistry for spatial control of neural stem cell differentiation

Cited by 14 publications

References 43 publications

Memory Re-Condensation

Memory Re-Condensation

Designs of Biomaterials and Microenvironments for Neuroengineering

Porous Silicon Fabrication and Surface Cracking Behavior Research Based on Anodic Electrochemical Etching^▴

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Patterned porous silicon photonic crystals with modular surface chemistry for spatial control of neural stem cell differentiation

Cited by 14 publications

References 43 publications

Memory Re-Condensation

Memory Re-Condensation

Designs of Biomaterials and Microenvironments for Neuroengineering

Porous Silicon Fabrication and Surface Cracking Behavior Research Based on Anodic Electrochemical Etching▴

Contact Info

Product

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Porous Silicon Fabrication and Surface Cracking Behavior Research Based on Anodic Electrochemical Etching^▴