How is porous silicon made?

Anodic etching, which is also called electrochemical etching, has been the most common method for the fabrication of porous silicon over the last 60 years. During these years, three electrochemical cell configurations have been utilized for the formation of porous silicon: lateral cell, single cell, and double cell.

What is porous silicon nanoparticles?

Porous silicon nanoparticles (PSiNPs) have attracted increasing interest as biomedical probes for drug delivery and imaging. Overall, the promising characteristics of PSiNPs encourage further exploration for biomedical research and translational medical platforms, particularly in biomedical imaging.

Where the porous silicon is used?

In this work, porous silicon has been used for the fabrication of multilayers for optical applications, using the photonic bandgap characteristic of these multilayers for the formation of filters, microcavities, omnidirectional mirrors and waveguides.

Is silicon nitride porous?

Open-Porous Silicon Nitride-Based Ceramics in Tubular Geometry Obtained by Slip-Casting and Gelcasting.

Is rubber a porous material?

Sponges, wood, rubber, and some rocks are porous materials. In contrast, marble, glass, and some plastics are not porous and contain very few open pockets of air (or pores).

Which of the following can lead to broken porous silicon samples?

Which of the following can lead to broken porous silicon samples? Explanation: An inappropriate design of the cell can lead to broken samples, leaky set-ups and corroded contacts.

Is silicon nitride toxic?

When heated to decomposition, silicon nitride may emit toxic fumes of ammonia and ozone. Contact with acids may generate flammable hydrogen gas.

What are 5 examples of porous materials?

Paper, cardboard, sponges, pumice stones, untreated wood, and cork are a few examples of porous materials. Nonporous hard-surface substances such as stainless steel, hard covering, and the rigid synthetic element or other generally utilized substances.

What are 2 examples of porous materials?

Sponges, wood, rubber, and some rocks are porous materials. In contrast, marble, glass, and some plastics are not porous and contain very few open pockets of air (or pores). A rock with good porosity is an important characteristic for an oil well.

Which is non destructive test among following?

Which among the following is not a type of Non-destructive testing? Explanation: Compression test is a type of destructive testing. This test is used to determine behavior of metals under compressive load. Visual testing, ultrasonic testing, eddy current testing are types of non-destructive testing.

What principle defines eddy current inspection?

What principle defines eddy current inspection (ECI)? Explanation: ECI is based on the principle of electromagnetic induction. In this eddy currents are induced within metal as a coil carrying AC is brought in proximity.

How is the synthesis of dibenzalacetone carried out?

Synthesis of Dibenzalacetone by Aldol Condensation. 1. To carry out a mixed aldol condensation reaction. 2. To study the mechanism of aldol condensation reaction. The reaction of an aldehyde with a ketone employing sodium hydroxide as the base is an example of a mixed aldol condensation reaction, the Claisen-Schmidt reaction.

How is aldol condensation used to make dibenzalacetone?

Condensation is a process which joins two or more molecules usually with the loss of a small molecule such as water or an alcohol. Aldol condensation (Claisen-Schmidt reaction) definitely is a process which join two carbonyl groups with a loss of water molecule in order to form β-hydroxyketone.

How to recrystallize dibenzalacetone as a solid?

Dibenzalacetone will crash out of the solution as a solid during the course of the reaction. Collect this solid via Hirsch filtration and wash it several times with small portions of cold water. Allow the solid to air dry by continuing to apply the vacuum for 2-3 min. Recrystallize the solid by dissolving in 2 mL of hot ethanol.

What is the molar mass of dibenzalacetone?

H3C C CH3 O 1 Acetone molar mass: 58 g/mol density: 0.79g/mL limiting reagent + 12 C H O Benzaldehyde molar mass: 106 g/mol density: 1.04 g/mL an excess will be used NaOH, H2O, CH3CH2OH CC O C H H H H original acetone carbons Dibenzalacetone molar mass: 234 g/mol melting point: somewhere between 80 and 120ºC H3C C C H2 O H OH H3C C CH2