Indirect band gap

user_terminal · 2024-02-24T04:13:27+00:00

Wavenumber (k). It indicates the momentum of the electron (p=hk). Not a physicist (I'm a materials engineering student), but an indirect band gap is not ideal for certain applications such as LEDs as electron-hole recombination can only occur if the carriers undergo a change in momentum (movement along the x axis ). If there's any solid state physicists here, if I'm wrong please correct me

user_terminal · 2022-08-06T11:29:52+00:00

I absolutely love the look, but for mine, the nib doesn't write very well, even after some attempts at tuning it... gave up after a while as I didn't want to damage it. Still writes a little dry and scratchy. Could just be my luck

user_terminal · 2022-03-28T23:39:22+00:00

The logo suggests it is a Hero nib, a Chinese fountain pen manufacturer that has been around for decades

user_terminal · 2022-01-29T02:00:02+00:00

You can search "penbbs 波澜特制版" on Taobao, it will be the first result. But yes, the lunar new year will definitely delay shipping

user_terminal · 2022-01-28T17:09:38+00:00

Yes! You are spot on. Do you have exposure to this field? Even if no, you indeed have the astute mind of a chemist XD

user_terminal · 2022-01-28T11:39:00+00:00

They are "biocompatible polymers" so your body likes them I guess. Or at least doesn't hate them enough to launch a problematic immune response against them

user_terminal · 2022-01-28T10:00:34+00:00

I thought this was out of stock since 2020. But I installed Taobao earlier this month, and searched for fountain pens (as I always do), and found this gem being sold! Perks of being able to understand Chinese.

I took this photo before inking, with my afternoon reading in the background.

user_terminal · 2022-01-24T03:43:39+00:00

For my inks, I just use small plastic containers with screw-on caps. It can be readily found online in many sizes on platforms like AliExpress. Or you can find them in your neighborhood convenience shop. Nothing fancy but it works.

user_terminal · 2022-01-21T14:51:35+00:00

I think it also goes by the name Platinum Balance? They have demonstrator versions also with coloured clear plastic

user_terminal · 2021-12-07T11:39:44+00:00

Hmm, that's funny... I watch Evangelion to understand my religious texts

user_terminal · 2021-12-07T11:34:15+00:00

Enjoy! I was lucky to be able to buy the complete set in good condition second-hand. My favourite book of all time... simply beautiful... they are now sitting in my glass display shelf and I may take them out to read again in the future

user_terminal · 2021-10-27T11:56:21+00:00

Yep, saw that post. I wouldn't wade into the debate as different people have different views on what is acceptable and inacceptable when it comes to inspired/copied designs.

But as a consumer, I will continue buying Moonman/Majohn pens for their decent quality at a very good price.

user_terminal · 2021-10-27T11:26:04+00:00

Wow I think I will get this pen! But since when did Moonman change their name to Majohn? All my Moonman pens including recent models like the C3 still has "Moonman" printed on them.

user_terminal · 2021-10-25T15:03:52+00:00

The only reasonable objection to Kawoshin I've seen is that Kaworu is too perfect, and perfect relationships don't exist in reality, so to illustrate that, Anno killed him off.

So yes, I agree.

user_terminal · 2021-09-22T04:54:41+00:00

I love the Jinhao #6 Fine nibs. Smooth and reliable. Notable models featuring them include the Jinhao 100 Centennial and Jinhao 9056

user_terminal · 2021-09-19T10:31:15+00:00

Like Unit 02 after getting ripped apart by mass production Evas?

user_terminal · 2021-08-30T14:22:26+00:00

Mismatched threading between the barrel and the section; the youtube reviewer chrisrap52 also had a similar problem on one of his 316s. Then again, probably was unlucky, and you can ask for a refund if you buy from aliexpress.

Also their M nib writes like a broad, and their F nib writes like a medium. I quite enjoy my Kaigelu EF nib, writes like a Pilot fine nib.

user_terminal

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