Porous Silicon Mac-imprint
Porous Silicon Mac-imprint - Related Videos
01:22
Imprinting
0 Views •
2019
Behavioral imprinting is observed in some newborn animals and occurs when they develop strong and specific attachments to another animal (usually a parent) following brief, early-life exposures. Offspring imprint onto parents within a brief period after birth or hatching; this time window is called the critical period. Once imprinting occurs, the bond established between the parents and their offspring is usually long-lasting. Survival Mother sheep imprint onto the scent of their lambs within...
01:44
Sustained Delivery of Nerve Growth Factor Using a Porous Silicon Film in Rat Pheochromocytoma 12 Cells
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2025
Source: Rosenberg, M., et al. Designing Porous Silicon Films as Carriers of Nerve Growth Factor. J. Vis. Exp. (2019).This video demonstrates the use of a degradable nanostructured porous silicon (PSi) film for the sustained release of nerve growth factor (NGF) to support PC12 cell differentiation. NGF is adsorbed onto the film’s pores through electrostatic interactions and is gradually released into the media by diffusion and scaffold degradation. This controlled delivery promotes PC12 cell...
08:31
Porous Silicon Microparticles for Delivery of siRNA Therapeutics
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Cited by 34 •
2015
Delivery remains the main challenge for the therapeutic implementation of small interfering RNA (siRNA). This protocol involves the use of a multifunctional and biocompatible siRNA delivery platform, consisting of arginine and polyethylenimine grafted porous silicon microparticles.
02:30
Genomic Imprinting and Inheritance
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2020
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes. The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
10:12
Designing Porous Silicon Films as Carriers of Nerve Growth Factor
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Cited by 3 •
2019
Here, we present a protocol to design and fabricate nanostructured porous silicon (PSi) films as degradable carriers for the nerve growth factor (NGF). Neuronal differentiation and outgrowth of PC12 cells and mice dorsal root ganglion (DRG) neurons are characterized upon treatment with the NGF-loaded PSi carriers.
FAQs
The patterned mold establishes the surface geometry that the silicon must reproduce, while the subsequent etching develops pores within the imprinted regions. This division of roles links the external three-dimensional form to the porous internal structure. As a result, researchers can design feature dimensions and pore arrangement together rather than treating surface patterning and porosity as unrelated steps.
Localized electrochemical or chemical etching develops porosity where the process is controlled, helping reproduce the mold geometry through the silicon material. The etching stage therefore does more than remove silicon: it contributes to the three-dimensional structure and affects the resulting pore arrangement, feature dimensions, and available surface area. These characteristics are important when tailoring devices for specific engineering functions.
Pore arrangement and surface area determine how much structured silicon is available for interactions within an engineered device. Their control allows the patterned material to be adapted for photonic devices, chemical and biological sensors, microfluidic platforms, and energy-related components. In each case, the ability to coordinate pore structure with the imprinted geometry supports compact designs with specialized functionality.
A typical workflow begins by placing or using a patterned mold to define the intended geometry on the silicon surface. The pattern is then transferred through imprinting, followed by controlled localized electrochemical or chemical etching. The etching develops pores and reproduces the imprint through the material, producing a three-dimensional porous structure whose dimensions and pore arrangement reflect the fabrication design.
The essential elements are a silicon substrate, a patterned mold, and an etching process selected as electrochemical or chemical. The mold supplies the target geometry, whereas controlled localization during etching develops the porous regions. Managing these elements together enables adjustment of pore arrangement, feature dimensions, and surface area without separating the porous structure from its patterned engineering form.
The approach can support several engineering device categories, including photonic devices, chemical and biological sensors, microfluidic platforms, and energy-related components. Its value comes from combining patterned three-dimensional features with controllable porosity and surface area. That combination can help integrate porous silicon into compact, multifunctional systems where geometry and material structure must operate together.
Scalable patterning can help extend controlled porous silicon structures beyond isolated demonstrations toward compact device integration. Because the process combines mold-defined geometry with controlled pore development, it offers a route to reproduce designed features while retaining adjustable pore arrangement and surface area. This is particularly relevant for multifunctional systems that combine photonic, sensing, fluidic, or energy-related roles.