pomozcie napisac formal letter :)

i need your help , i'm writing emails to some guys because i need some
articles, i think mail should be short :) thanks from mountain ;P
this is my first version :

Dear sir,
I am a student of Materials Ingeeniering on Jagiellonian University and I am
interested in your researches about NanoFib. I'm asking if You could send me a
copy of your article "..." , i would be gratefull.
Yours faithfully,

Dear Sir, (lepiej wpisz nazwisko, jeśli prosisz o artykul, to chyba wiesz do kogo piszesz?)

I am a Materials Engineering student at Jagiellonian University in Cracow, Poland. I am writing to you because I am interested in your research on NanoFib. I would really appreciate it if you could please send me a copy of your article "...." Thank you.

nonono bardzo ladnie i bardzo zgrabnie :) dzieki z gory :)