SKU: 98900995524

Thin Layer WS2 Dispersion

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Description

Thin Layer WS2 DispersionProduct Name NameThin Layer WS2 Dispersion 1 mg mL Product Overview Tungsten disulfide (WS2) is a type of transition metal sulfide (TMDC) with a graphene like layered structure, where the layers are stacked together by weak van der Waals forces. Single layer WS2 is composed of three layers of atoms, with the atomic planes of W and S arranged in a hexagonal array. The W atoms are sandwiched between the two layers of S atoms, forming an S W S atomic

Product Name

Name:Thin Layer WS2 Dispersion 1 mg/mL

Product Overview

Tungsten disulfide (WS2) is a type of transition metal sulfide (TMDC) with a graphene like layered structure, where the layers are stacked together by weak van der Waals forces. Single layer WS2 is composed of three layers of atoms, with the atomic planes of W and S arranged in a hexagonal array. The W atoms are sandwiched between the two layers of S atoms, forming an S-W-S atomic layer structure with a "sandwich" structure. Multi layer or block WS2 is composed of single layers stacked together. Depending on the stacking method of the single layers, WS2 has three crystal structures: 1T, 2H, and 3R.

The synthesis methods of WS2 are mainly divided into two categories: "top-down" stripping method and "bottom-up" method. The "top-down" exfoliation method includes micro mechanical exfoliation, liquid-phase exfoliation, and lithium-ion intercalation, mainly using physical means to exfoliate the bulk WS2 into a single-layer or few layer layered structure. The "bottom-up" method includes chemical vapor deposition, hydrothermal method, and high-temperature thermal decomposition method, mainly using chemical means to grow atoms and molecules into nanoscale thin films and granular WS2 under certain environmental conditions.

The WS2 provided by Xianfeng is prepared by lithium intercalation method, using n-butyl lithium as intercalation agent to insert lithium ions into the interlayer of WS2, forming LixWS2 intercalation compound. The intercalation compound reacts violently with solvent water to generate a large amount of H2, thereby increasing the interlayer spacing of WS2 and weakening the van der Waals forces between layers. After ultrasonic treatment, thin and few layer WS2 dispersions are obtained. The WS2 nanosheets obtained by lithium intercalation method have a 1T-2H phase hybrid structure. According to XPS calculation, the fitting ratio of 1T phase is about 60% (the values may vary between different batches).


Technical Parameter

 

Diameter:.1-4 μm

Thickness:-5 nm

Stablizer:LiOH

 

Product Features

1. Good dispersibility: Dispersions of different types of solvents are available (water, ethanol, isopropanol), as well as WS2 powder obtained by freeze-drying the dispersion.

2. Multiple active sites: It has good catalytic performance and a large specific surface area that can be used to load other catalysts to improve catalytic efficiency.

3. Excellent light absorption ability: It has strong absorption ability for near-infrared light and can be used for photocatalytic water splitting to produce hydrogen, organic pollutant degradation, etc.

4. Adjustable size and thickness: Different diameters and thicknesses of nanosheets can be customized to meet the experimental needs of different researchers.


Application Fields

 

1. Electronic and optoelectronic devices: The band structure is closely related to the thickness of the material layers, and the adjustability of WS2 thickness can give it different optoelectronic properties. Single layer WS2 has the advantages of high electron mobility, large on/off current ratio, and current carrying capacity, and can be used in the manufacturing of electronic devices such as transistors.

2. Electrochemical biosensors: WS2 exhibits excellent electrochemical sensing performance due to its large specific surface area, good electron mobility, and high electron density of states,

It can be used to detect biomolecules such as DNA and glucose, and has excellent selectivity for some organic molecules such as formaldehyde, ethanol, and benzene.

3. Biomedical: WS2 has good light absorption ability in the near-infrared region, which can convert light energy into heat energy. The high temperature generated can cause tumor cell apoptosis, and it also has good biocompatibility, making it an excellent photothermal conversion material.

4. Energy storage: WS2, due to its unique layered structure, can provide certain adsorption sites for energy storage; Meanwhile, WS2 has good stability and can be reused for cyclic charging and discharging, and is widely used in fields such as fuel cells, supercapacitors, and lithium batteries.

5. Catalyst: WS2, due to its light weight and large specific surface area, can be used as a photocatalyst. After visible light irradiation, WS2 can absorb photons, undergo electron transitions to form electron hole pairs, and react with water to generate hydroxyl radicals with high reactivity and strong oxidizing properties, which degrade organic matter into small molecules and inorganic ions.


INSTRUCTION FOR USE

Attention: When taking TEM images, it is necessary to use micro grids (with the thinnest possible thickness) to prepare samples, which makes it easy to observe their layered structure; Dispersed liquid is prone to oxidation when exposed to air, and its color will fade over time. When storing, inert gas can be introduced to remove oxygen and extend the use time; The dispersion liquid will contain lithium hydroxide, which acts as a stabilizer to aid dispersion and can be removed by centrifugal washing; The powder is obtained by freeze-drying the dispersion, and its dispersibility is slightly worse than that of the original solution.


Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

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SKU: 98900995524

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4.1 ★★★★★
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Verified Purchase
Lyla Mae
Grantham, US
★★★★★ 5
WOW! This printer has been VERY impressive thus far *UPDATE*
Color: Black, Style: ET-2800-B, Pattern Name: Printer
My old printer broke (sooner than I would have liked) so I did A LOT of research before deciding to buy this Epson EcoTank printer for home office use. This is my honest review of it this far and I will definitely update my review if I run into any issues. So far, this printer has been pretty impressive (I've been using it for about a month). The price was pretty average for a printer... but I personally think all printers are overpriced so it was a bit more than I would have liked to spend. It is smaller and more lightweight than I was expecting which is a plus because it takes up less desk space than my previous HP printer. It is very easy to set up, comes with step-by-step easy instructions and guided instructions through the app. It only took me about 10 minutes (Mostly just waiting for the printer to initialize on its own). It is very easy and surprisingly satisfying to fill the ink tank. I like the idea that this ink might last longer than traditional cartridges and won't have as much plastic waste that went along with my old HP Inkjet. I have printed plain black and white documents as well as photos. I print all my photos at home, which is most of the printing that I do, so quality was important to me. The photos came out with pretty good quality! No ink smudges or off colors, colors are bright/vivid, and it is easy to modify what paper you're using with automatic prompts on the printer. Now for the negatives and the reason I'm giving this 4 stars... app to printer connection issues. This was a big issue with my old printer as well. I'm pretty tech savvy and I just have no idea why this is still always an issue for me. There is an extra Epson app that you are supposed to download for printing. Sometimes it can find my printer, sometimes it can't. Sometimes it gives me printer errors or won't let me print documents. And now every time I go to print something it says the paper being used doesn't match the paper settings so I have to bypass that error message (even though it does match in settings and the app, and this happens for both regular paper and photo paper). I've turned everything off and back on again, but the issues with consistent connection and error messages are still an issue. Usually with some fiddling around, I can get the documents/pictures to print but sometimes it feels like I'm jumping through unnecessary hoops. I'm still working out the kinks so if I find some magic solution I'll update my review. Considering this is an issue with most home printers I've used, it's not a deal breaker. All in all, if you are looking for a new home printer, I would definitely recommend this one. The quality has been great for me and I am pleased with my purchase (so far). Hope this helps! *UPDATE*: I have now printed HUNDREDS of photos, they are all excellent quality, and my ink tanks are still mostly full. This is WAY better than my HP printer as far as ink longevity. Changing my review to 5 stars just based on how long this ink lasts. User interface is still a tad annoying but so worth it regardless.
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Reviewed in the United States on May 10, 2024
D
Verified Purchase
Diana Crossman
Alexandria, US
★★★★★ 5
Quality Printer
Color: Black, Style: ET-2800-B, Pattern Name: Printer
Wonderful multi purpose printer. I bought this months ago and finally got it set up. Set up was easy. Love that the printer is so light weight and fairly compact that I can move it wherever if needed. The supply of ink that came with it was awesome. The ink goes a long way. I have printed out a lot of photos on this printer and the quality has been very good. I have not encountered any paper jams. The photo printing has not been smudged nor has the color been uneven. From documents to photos this little printer does it all and does it very well. When my work printer dies I will be replacing it w another Epson Eco Tank for sure.
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Reviewed in the United States on May 15, 2026
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Verified Purchase
Joy
Fort Morgan, US
★★★★★ 1
0 STARS!! DO NOT BUY!! HORRIBLE!!
Color: Black, Style: ET-2800-B, Pattern Name: Printer, Color: Black, Style: ET-2800-B, Pattern Name: Printer
DO NOT BUY! 0 STARS -I would give 0 stars if I could. This EPSON ET-2800 is the worst printer I have ever owned. -I work from home where I need to do small print jobs throughout the month. I didn’t need a printer that is super fast or had a lot of bells and whistles. I searched many, many, many reviews and this Epson ET-2800 kept coming up as a really good option for my purposes. It had great reviews and it supposedly uses less ink. -I went ahead and bought it and it was delivered Dec. 28. -Throughout the month of January I did a few print jobs here and there. Everything seemed ok. Toward the end of January I noticed that there was black shadowing behind a whole horizontal line on one of my print jobs. The shadow went the whole width of the paper. Thought it was a one-off and didn’t think about it too much since I had so much going on at the time. I also never dreamed that I would need to clean my printer since I hadn’t even owned it for a month at this point. -February 2 I started printing some things for work again and the lettering had lines through the center of the page. Even though I had just had the printer for a month and hadn’t printed that much stuff so I really shouldn’t have to clean it already, I used the “clean nozzle” tool on the printer. **I had to do the cleaning cycle 8 times before it was printing correctly meaning there were no missing segments on the sheet that is printed after the cleaning. ** This was a huge waste of my time and ink and paper!!! -February 16 I attempted to print some pages and again there were lines throughout the papers!! -February 17 I called Amazon to try to get a refund and they said I was outside of the return window. So -I called Epson. I explained what was happening and the lady told me before they would do anything I had to go through some “detailed instructions” on how to clean the printer. Only AFTER I completed all the steps would they even think about helping me. -So first step is to perform a nozzle cleaning per the instructions. Did this. -Instructions say to wait 12 hours before doing anything else. So I waited 12 hours and did another cleaning. Did this twice. The printer showed no broken/missing segments. -So I printed some pages and several of the pages had black smudges/lines/dots on the tops of the pages and most of them had black ink all over the bottom right corners of the papers. -Did the print nozzle cleaning and had broken/missing segments again. -Instructions say to do a head cleaning. Did head cleaning twice I think, and no broken/missing segments. -Printed a few pages and several of the pages had the shadows behind the whole horizontal line again and also some random black dots sprinkled throughout several pages. -Ran a Power Cleaning which is the last step of this process. This process by the way uses up A LOT of ink! My black ink is now less than half!! All the colors are down by ¼! They were full obviously when I started using the printer and the black was only down a smidge at the beginning of this whole cleaning process. -Now I have to wait 12 hours to see if the quality improves. -This is absolutely ridiculous!!! This whole process has wasted my time (each cleaning takes at least 3 minutes to do. The Power Cleaning takes 12 minutes). This whole process has used up a TON of my ink! This whole process has used up a ton of paper!! I shouldn’t have to clean my printer head or nozzle every single time I need to print! I have only had this printer for 7 weeks!!! DO NOT BUY THIS PRINTER! It is junk! I only hope I can get a refund after all this...
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Reviewed in the United States on February 18, 2025
S
Verified Purchase
Sam
Alexandria, US
★★★★★ 5
Almost a year after purchase and this printer has not let me down!
Color: Black, Style: ET-2800-B, Pattern Name: Printer
I wanted to wait to write a review on this printer to see how it held up over time. Happy to report, after almost a year, it is still working perfectly! I was very nervous about purchasing a printer since it was my first time having to shop for one and almost every printer I looked at had something negative to say about the product. After extensive research, I decided to take a leap with the Epson EcoTank 2800. I was looking for a printer to use for recreational use. Something with decent print quality and longevity as well as something on a reasonable budget. I normally print full pages of color and have been using it regularly for around a year and I have about half of the ink that came with the printer left. Safe to say, the ink lasts a while. The quality may not be the top of the line quality you can get with a more expensive printer, but for the price and just everyday use, the quality is satisfactory. It was easy to set up and walked you through the instructions to connect to devices and configure it. The screen is a little small but if you can overlook that, it really is a nice printer. I have used regular printer paper, card stock, and sticker paper with this printer and I try to load only a few sheets at a time to avoid a jam but I haven't had any issues with it so far. Overall, I am extremely happy with my purchase. It can be extremely difficult to find a decent printer and some reviews can be misleading or leave you with questions on if the product is for you. If you are looking for something for printing everyday with decent quality and ink consumption that won't cost you a fortune, this printer is definitely worth taking a chance on!
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Reviewed in the United States on April 24, 2026
S
Verified Purchase
Scott
Phoenix, US
★★★★★ 4
Printing is great, wifi is a problem (I figured out how to make it work!)
Color: White, Style: ET-2800-W, Pattern Name: Printer
I was on the fence about buying this printer because most of the 1 star reviews all said the same thing... "The Wifi would not work" So I followed the instructions, Turned on the print, downloaded the IOS app, connected to the printer via Bluetooth, installed the ink, initialized the printheads. While that was going on, the app asked me to setup the wifi. a List of SSID's came up and I selected the one I wanted. I put in the password and it connected and the icon on the printer turned blue. I have a Unifi setup and I could see that the printer connected to access point #3 @ 2.4ghz and got an ip address. I locked the IP address to the printer. (For my instructions to work for you, you need to make a reservation or lock the ipaddress that your DHCP server provided to the printer. ) If you don't do this, you will get a different address every time you turn the printer on and the computer and app will not be able to find the printer. When the initialization was complete, the app on my phone said it could not connect to the printer. I decided to try to connect to a computer and come back to the phone app. I downloaded the software package from Epson and ran it. When it went to connect to the printer it could not find it and brings up a list of troubleshooting steps that are not likely to do anything. There are videos about this problem and they are all useless. I am an IT professional with 26 years of experience. I am not going to unplug the printer and wait five minutes, I am not going to re-boot my router, I have a Unifi network environment with over 150 devices connected... (I have great wifi coverage, I am not moving my printer anywhere) My network works just fine, this printer is the issue! So at this point, I know that the printer IS connected to my wifi and it got an IP address. This is not a wifi problem as everyone seems to think it is. It is an issue with the Epson software. I decided to try to install it via the windows printer installer. I selected install via TCP/IP and put the ipaddress that my Unifi system provided to the printer. Windows found the printer and since the Epson app had already installed the drivers... just asked me what drivers I wanted to use. The ET-2800 showed up on the right hand side of the screen. I selected it, it installed and I was able to try a test print. It worked fine. I can print from my computer to the printer via the network. Next was the phone app. The phone app has the option to find the printer via the IP address. I put the IP address in and it found the printer. The phone app works now too. So, It took me some time to get this working, it should not have taken any time at all if the software worked correctly. The printer is really nice, it is a shame that the software is so bad when it comes to connecting to the printer. So if you decide to buy one of these printers, save yourself the headache and just install using the ip address, it is quick and easy that way and it just works. I would have just purchased an HP printer, but I did not want to deal with all the issues of their subscription ink service. I feel like the cost of ink makes this printer worth the hassle of getting it to work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 2, 2024

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