to deconstruct 萌 into hiragana, it's もえ (mo-e) but I'm sorry, I do not know the meaning of it as 萌 As もえ I think it means something like "burn" but as 萌え I think it means... "fetish" o_o sorry if I'm wrong, I just done some quick research to help you!

I don't use もえ(萌え,Moe ) . But culture is always change the words & world. Don't hasitate use it. Otaku is a one of a Japanese culture.^^

萌=Moe（もえ） This is a slang. The meaning is same as Chinese, cute. Well, we don't usually use this word in our conversation. This word is often used among "Otaku" in Japan.