Silicon Definition and 199 Threads

I was reading a paper [Appl. Phys. Lett. 91, 181910 (2007)] that has fabricated a Palladium (Pd) based sensor for hydrogen. One of the key points is that it is known that Pd is quite sensitive to hydrogen which is why the paper utilized a Pd array that may act as a sensor for detecting hydrogen...

I have included the resulting histogram that emerges when I do this procedure and it does not look as expected. I am using CASTEP and have read the .bands file as a txt file into python where i have extracted the relevant data.

I'm having trouble finding in the literature specifically about the porous silicon process using the dry method instead of the more common wet method that is used. wet process Using porous silicon to promote wet thermal oxidation uses the process electrochemically will allow water molecules to...

Ekaterina Magg, Maria Bergemann and colleagues have published results of new calculations concerning the composition of the sun. https://phys.org/news/2022-05-solar-spectrum-decade-long-controversy-sun.html As part of the work on her Ph.D. in that group, Ekaterina Magg set out to calculate in...

Can Silicon and Germanium semiconductors mixture (chemical reaction) with some other chemical elements (if required) assist in creating new and existing robust electronic components? Si + Ge + ? + ? = Can this assist in quantum computing?

I am learning about designing semiconductors but I had some issues understanding some things about the structure of Si. About lattice structure: 1) Why does an FCC has 8 atoms per cell? Doesnt has 14? About wafers 1) I know you can have wafers along different surfaces. What information can I...

https://www.researchgate.net/figure/1-Silicon-crystallographic-structure-It-has-the-diamond-structure-which-is-two-fcc_fig4_34172659 the fcc silicon lattice is shown. My question is: Since the silicon atom has 4 valence electrons and requires 4 more to be completed, why are so many atoms shown...

Hi, everyone. I just finished studying the principle on which a transformer works. It relies on Faraday's law of induction. And my high school physics book uses the following picture for illustration: Roughly speaking, the...

I have gotten access to a large bare silicon die (almost 1" across, 14nm process) that my company gets from a fab. I've been monkeying around with an ohmmeter placed at the top of the die, with the test leads placed at various points around the die, and I almost always measure the same value...

I still not understand about this, i found so many formulas but I don't know which one i should use for this question

Does the Silicon Nitride Waveguide (Si3N4) has a cladding ?! I read an article that they use the evanescent field of silicon-nitride waveguide.. If the answer yes it doesn't has a cladding then can I say that the evanescent field length in the surrounding medium is the mode field portion in that...

Dear All! I want to synthesize silicon allotrope. Not just cubic silicon, but orthorhombic. But in the first step, I need to synthesize Li7Si12. Is it possible or not? Any ideas about how to do it? The main idea can be found at this...

After lengthy process of "deep learning" and back propagation of information; would we get static coefficients for the thousand of nodes; for example for playing game of chess, would that state be good to hard-wire on the silicon cheep and this way we would have perfect chess player? Or the...

Will silicon be replaced by a new material in order to open up new possibilities in the world of microprocessors? I believe I read that a graphene processor will allow processors to run at speeds of hundreds of GHz.

Both the cz (Czochralski Process), and Float-zone refining of silicon require an inert atmosphere, usually argon. How pure does the argon atmosphere have to be? How high of a vacuum has to be pulled before releasing argon into the tank?

I’m using an inductive heater to try to melt some 99.85% polycrystalline silicon, as would occur in the Czochralski process, but the silicon workpiece is not melting let alone even getting hot. The silicon workpiece is about the size of a playing dice. It becomes conductive at 200 F and becomes...

Hi folks is there anyone who could help me with si02 please

is there any sci-fi that would rerate a life based on ammonia or silicon or any other type of life?

Silicon Band Structure for both ibrav 0 and ibrav 2 I did scf and bands for silicon using both ibrav=0 and ibrav 2 After running the two bands separately I noticed that the band structures for the two (ibrav 0 and ibrav 2) were totally difference but in literature i read that the two (both ibrav...

I’m using a zvs inductive heater to try to melt some 99.85% polycrystalline silicon, as would occur in the Czochralski process, but the silicon workpiece is not melting let alone even getting hot. The silicon workpiece is about the size of a playing dice, and becomes fully conductive after...

Hi there, it is commonly accepted that the lifespan of crystalline silicon solar cells is about 20-30years. And they define the lifespan as when the solar cells efficiency drop to about lower than 10%. However, what are the possible reasons for the degradation? I can only find research papers...

Homework Statement I am asked to discuss the band structure of diamond. I saw the band structure of diamond has 4 filled valence bands and then 4 conduction bands. Silicon, the same. Homework Equations --- The Attempt at a Solution I'm feeling really silly because I don't understand why it is...

I'm looking for a table of data in electronic format, for optical transmission of Si in the mid infrared at say a wavelength range of 1-15um. Something like a text file or CSV file from a public source? Also looking for Germanium - the same spectrum. Any suggestions where I could get this?

I volunteer in an 8th grade classroom and I wanted to bring in some silicon wafers for the students to examine for a "show and tell" session, in order to get them interested in technology. Are there any dangers to the students if they are allowed to handle a wafer? I don't really care if the...

Transistors are tiny crystal of silicon. Transistor switch and it's support component are memory cell. A single memory chip can hold up to 4 transistor ? What is the shrinking bit ? Can you please explain?

Hello, Not sure really where to ask this but I couldn't find a good answer so why not a physics forum, because well this involves physics. I just got a gopro for my fpv drone and I am wondering what type of case to get for it, either a plastic or silicone one. If I am going 30+ mph and smack...

Hi everyone. I came across the following article on Wired about physicists (or I should say, physics graduates) playing an increasingly prominent role in Silicon Valley, specifically in the field of machine learning/data science...

I'm trying to determine how much energy it takes to melt down sand into silicon, and convert it to solar panels. any info would be great. Thanks.

We conducted an experiment in which we found the variation in the resistance of a fairly pure silicon sample between temperatures of about 400K to 600K, and we found a value for the energy gap of silicon of our sample. We were comparing the resistance variation with the model...

So we are doing Radioactivity lab at second year undergraduate. I am confused about the workings of the silicon radiation detects we are using even though the demonstrators tried to explain. We are detecting beta and gamma radiations by placing sources above a silicon detector that have a small...

I'm taking a module in solid state electronics and I'm a bit confused with the energy band diagrams. I was told that the region between the top of VB and and the bottom of the CB is the "forbidden gap". However after learning about N-type semiconductors(silicon), I see that the extra electron...

An exciton is a bound electron-hole pair (in a semiconductor). For this problem, think of an exciton as a hydrogen-like atom, with a negatively charged electron and positively charged hole orbiting each other. The permittivity of free space (ε0) is replaced with permittivity of the...

I modified an employer's patented device,in order to treat bulk silicon carbide grit.It became crystal clear resembling clear silica grainsThe resultant was not analyzed.This was a low-temperature process.Is there any potential application for this type of process?

Good day everyone I'm doing a homework and stuck on the parts ii, iv and v. In fact I don't know the formula to calculate them Could someone help me to solve them, please

I read on a table by Dr Lynn Fuller on sputtering various materials and there was a table relating RF sputtering power to stress, with a sweet spot at around 300 watts per square inch or roughly 500 milliwatts per square millimeter on the target. The material in question is Silicon Carbide...

Hello, I'm working on simulation of hydrogenated amorphous and microcristalline silicon solar cells. The software I use is AMPS 1D So, I need (n,k) of hydrogenated amorphous silicon carbide (a-SiC:H) Thank you

I'm doing independent study on semiconductors to prepare for a future class and I'm having problems with some problems that concern finding the n and p of doped Silicon given only a temperature, NA, ND, and Ni. I understand that n*p=Ni^2, but, given that this means that n does not equal ND (and...

Hello, I have a silicon wafer with a 50nm layer of copper sputtered on it. I coated it with a 1µm of positive photo resist and patterned it with a UV laser stepper. Then I developed it and washed it thoroughly. The pattern has a surface area which measures appx 1300µm x 8µm. What I want to do...

most STM images of graphite have been acquired using a bias voltage of ? Or in the range ? Same thing for graphene and Silicon carbide

In the research paper, a piezoresistive pressure sensor is designed. My question is if we look at table 1 in column 1 the values of deformation of diaphragm for single crystal silicon n type is used If we interchange n type and p type the values for 1000,2000 Kpa are same and then the values...

Let's say I have an amount of freshly-isolated silicon in the bottom of a jar of water. I have heard it is usable for water filtration; but how else could I use this element, and with it could I make silicone? I have searched google on making silicone, but all I have found are subjects about...

In glass, the elements that make it up, like silicon, and sodium. Does the electron eV levels change as these elements become molecules [PLAIN]http://www.chemicalforums.com/Smileys/classic/grin.gif, and become solid glass. To put it another way, if silicon, sodium, and calcium atoms which have...

I am trying to create a conductive Silicon Carbide (SiC) heating element. The US patent 650234 "Process of making carborundum articles", filed in 1899 states essentially that crushed SiC crystals can be be glued together (using diluted glue) then sintered. It states that the addition of 15-20%...

Hi I have been drawing pi bands, silicon nanoribbons. But I can't draw sigma bands. Can help me for plotting sigma bands, silicon nanoribbons in Matlab.

Homework Statement Describe the process of creating a bulk heterojunction and an ordered heterojunction Homework Equations n/a The Attempt at a Solution I understand that each heterojunction has a cathode, anode, acceptor, and donor along with a indium tin oxide coating but I am unsure...

Regarding the anisotropic etching of the (110) silicon wafer, why will the (110) oriented wafers form perpendicular trenches with the (111)?

Hello Forum, I would like to understand why silicon, specifically, is used to make wafers (substrates) to make integrated circuits. ICs are small and dense electric circuits. Are the various gates, resistors, capacitors, transistors and other components made by doping different regions of the...

Hi guys, Please give me some suggestions about etching TiO2 TiO2, MgF2, and Cr2O3 are sputtered on silicon substrate. The top pattern is TiO2 with the linewidth of 346nm. I would use E-beam to transfer pattern. The photoresist is PMMA. The possible etchant I have searched for is hydrogen...

I want to know spatial distribution (concentration) of hydrogen and phosphorus in silicon oxide film with thickness of 1 micrometer. What is the simplest possible way to obtain such distributions with adequate resolution (~50 nm)?

Good day, many articles used sillicon wafer as substrate over others (like:platinum, glass, sapphire and etc) to grow Zinc oxide thin films, but I'm don't know the real reason they choose silicon wafer as substrate compare to others. so I'm asking what are the advantages of using Silicon wafers...