{"id":11998,"date":"2020-12-07T10:07:19","date_gmt":"2020-12-07T12:07:19","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/?p=11998"},"modified":"2023-01-05T14:32:34","modified_gmt":"2023-01-05T17:32:34","slug":"new-era-for-cnt","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/pl\/new-era-for-cnt\/","title":{"rendered":"Nowa era dla CNT: Nowe podej\u015bcie do uprawy las\u00f3w CNT"},"content":{"rendered":"

Nanorurki w\u0119glowe (CNT) to alotropy w\u0119gla o cylindrycznym kszta\u0142cie plastra miodu i \u015brednicy nano. <\/p>\n\n\n\n

Istniej\u0105 liczne w\u0142a\u015bciwo\u015bci CNT, takie jak wytrzyma\u0142o\u015b\u0107 mechaniczna, elastyczno\u015b\u0107, lekko\u015b\u0107, przewodno\u015b\u0107 elektryczna i cieplna, kt\u00f3re sprawiaj\u0105, \u017ce jest to najbardziej obiecuj\u0105cy materia\u0142. <\/p>\n\n\n\n

Wiele bran\u017c, w tym elektronika, medycyna, magazynowanie energii, czujniki i wiele innych, wykorzystuje CNT w du\u017cych ilo\u015bciach. Rosn\u0105cy popyt wywiera ci\u0105g\u0142\u0105 presj\u0119 na zwi\u0119kszenie skali produkcji CNT. <\/p>\n\n\n\n

Produkcja CNT na du\u017c\u0105 skal\u0119 sta\u0142a si\u0119 g\u0142\u00f3wnym wyzwaniem, kt\u00f3re utrudnia ich zastosowanie. <\/p>\n\n\n\n

Podj\u0119cie wyzwania :<\/p>\n\n\n\n

Zazwyczaj naukowcy wol\u0105 hodowa\u0107 lasy CNT ni\u017c hodowa\u0107 je pojedynczo. Lasy CNT to pionowo ustawione tablice CNT, kt\u00f3re s\u0105 samoorganizuj\u0105ce si\u0119. <\/p>\n\n\n\n

Zwykle odbywa si\u0119 to poprzez proces chemicznego osadzania z fazy gazowej w obecno\u015bci sta\u0142ego katalizatora na pod\u0142o\u017cu, kt\u00f3re jest p\u00f3\u017aniej oddzielane od lasu CNT w celu uzyskania materia\u0142u o wysokiej czysto\u015bci. <\/p>\n\n\n\n

Chocia\u017c proces ten ma wiele zalet, jedynym powa\u017cnym problemem jest jego d\u0142ugo\u015b\u0107. <\/p>\n\n\n\n

Do tej pory naukowcy byli w stanie wyhodowa\u0107 las CNT o d\u0142ugo\u015bci do 2 cm przy u\u017cyciu katalizator\u00f3w, takich jak \u017celazo (Fe) na no\u015bniku z tlenku glinu (Al2O3) (d\u0142ugo\u015b\u0107 CNT odgrywa kluczow\u0105 rol\u0119, je\u015bli chodzi o ich w\u0142a\u015bciwo\u015bci, dlatego konieczne jest uwzgl\u0119dnienie tego aspektu). <\/p>\n\n\n\n

Wp\u0142ywa to na jego warto\u015b\u0107 przemys\u0142ow\u0105, ograniczaj\u0105c poda\u017c i zwi\u0119kszaj\u0105c koszt materia\u0142u. <\/p>\n\n\n\n

Dokonano rewolucyjnego odkrycia, kt\u00f3re ca\u0142kowicie zmieni\u0142o zasady gry. <\/p>\n\n\n\n

Niedawno zesp\u00f3\u0142 naukowc\u00f3w z Japonii zarejestrowa\u0142 d\u0142ugo\u015b\u0107 lasu CNT do 14 cm dzi\u0119ki nowatorskiemu podej\u015bciu. Ich badania zosta\u0142y niedawno opublikowane w czasopi\u015bmie Carbon. <\/p>\n\n\n\n

Hisashi Sugime, adiunkt na Uniwersytecie Waseda, i jego zesp\u00f3\u0142 odkryli, \u017ce CNT przesta\u0142y rosn\u0105\u0107 z powodu stopniowej zmiany strukturalnej katalizatora (Fe-Al2Ox), kt\u00f3ry by\u0142 u\u017cywany wcze\u015bniej. <\/p>\n\n\n\n

Zasadniczo g\u0119sto\u015b\u0107 CNT, kt\u00f3ra zale\u017cy od liczby aktywnych katalizator\u00f3w, jest niewystarczaj\u0105ca do utrzymania samono\u015bnej struktury, a wzrost lasu ko\u0144czy si\u0119. <\/p>\n\n\n\n

Dlatego zastosowany katalizator musi pozosta\u0107 strukturalnie i chemicznie stabilny.  <\/p>\n\n\n\n

Ich podej\u015bcie polega\u0142o na zmianie techniki w celu st\u0142umienia tej niestabilno\u015bci. <\/p>\n\n\n\n

Osi\u0105gn\u0119li to poprzez dodanie warstwy gadolinu (Gd) do wcze\u015bniejszego katalizatora pokrytego pod\u0142o\u017cem krzemowym typu n. <\/p>\n\n\n\n

Warstwa gadolinu pomog\u0142a w zapobieganiu degradacji katalizatora, co z kolei pozwoli\u0142o na wzrost lasu CNT o 5 cm. <\/p>\n\n\n\n

Ponadto, aby osi\u0105gn\u0105\u0107 po\u017c\u0105dan\u0105 d\u0142ugo\u015b\u0107, utrzymywali katalizator w komorze zwanej komor\u0105 chemicznego osadzania z fazy gazowej (CVD). <\/p>\n\n\n\n

Katalizator poddano obr\u00f3bce wst\u0119pnej, utrzymuj\u0105c temperatur\u0119 do 750\u00b0C i dostarczaj\u0105c niewielkie st\u0119\u017cenia opar\u00f3w Fe i Al w temperaturze pokojowej. <\/p>\n\n\n\n

Pomog\u0142o to w utrzymaniu struktury katalizatora do 26 godzin, co z kolei sprzyja\u0142o wzrostowi lasu CNT. <\/p>\n\n\n\n

Po dok\u0142adnych analizach uda\u0142o im si\u0119 z powodzeniem zarejestrowa\u0107 d\u0142ugo\u015b\u0107 lasu CNT na 14 cm. <\/p>\n\n\n\n

Ich osi\u0105gni\u0119cie wyznaczy\u0142o nowy horyzont dla rozwijaj\u0105cych si\u0119 ga\u0142\u0119zi przemys\u0142u, a ten niezwyk\u0142y post\u0119p poszerzy\u0142 aspekty zastosowania CNT. <\/p>\n\n\n\n

Mo\u017ce to zmieni\u0107 podej\u015bcie do nanotechnologii i nanonauki w przysz\u0142ych badaniach. <\/p>\n\n\n\n

Aby przeczyta\u0107 ca\u0142y opublikowany artyku\u0142 badawczy, zapoznaj si\u0119 z poni\u017cszym DOI. <\/p>\n\n\n\n

Odniesienie :<\/p>\n\n\n\n

Hisashi Sugime, Toshihiro Sato, Rei Nakagawa, Tatsuhiro Hayashi, Yoku Inoue, Suguru Noda. Ultra-d\u0142ugi las nanorurek w\u0119glowych poprzez uzupe\u0142nianie in situ \u017ar\u00f3de\u0142 opar\u00f3w \u017celaza i aluminium. W\u0119giel<\/strong>, 2020; https:\/\/doi.org\/10.1016\/j.carbon.2020.10.066<\/a><\/p>\n\n\n\n

Je\u015bli jeste\u015b badaczem w dziedzinie nanotechnologii, mo\u017cemy pom\u00f3c Ci stworzy\u0107 infografik\u0119 na powi\u0105zane tematy w Mind the graph. <\/p>","protected":false},"excerpt":{"rendered":"

Nanorurki w\u0119glowe (CNT) to alotropy w\u0119gla o cylindrycznym kszta\u0142cie plastra miodu i \u015brednicy nano. Istniej\u0105 liczne w\u0142a\u015bciwo\u015bci CNT, takie jak wytrzyma\u0142o\u015b\u0107 mechaniczna, elastyczno\u015b\u0107, lekko\u015b\u0107, przewodno\u015b\u0107 elektryczna i cieplna, kt\u00f3re sprawiaj\u0105, \u017ce jest to najbardziej obiecuj\u0105cy materia\u0142. Wiele bran\u017c, w tym elektronika, medycyna, magazynowanie energii, czujniki i wiele innych, wykorzystuje CNT w du\u017cych ilo\u015bciach. Rosn\u0105ca [...]<\/p>","protected":false},"author":4,"featured_media":11999,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959],"tags":[554],"yoast_head":"\nNew Era for CNTs: A New Approach to Grow the CNT Forests MTG<\/title>\n<meta name=\"description\" content=\"Read this blog to get an idea of what is the new way of growing CNT forests. 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He has a Ph.D. and solid scientific background in Psychopharmacology and experience as a Guest Researcher at the Max Planck Institute of Psychiatry (Germany) and Researcher in D'Or Institute for Research and Education (IDOR, Brazil). Fabricio holds over 2500 citations in Google Scholar. He has 10 years of experience in small innovative businesses, with relevant experience in product design and innovation management. 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