Fly eye inovhura nzira yekugadzira biomimetic nzvimbo
Fly eye inovhura nzira yekugadzira biomimetic nzvimbo
Anonim

Mitsara yemakonea madiki akasimudzwa anogona kunge ari kiyi yekugadzira zviri nyore zvebiomimetic nzvimbo, nzvimbo dzinotevedzera zvimiro zvebiological tissues, sekureva kwechikwata chevatsvagiri vePenn State.

"Bioreplication yakatanga munenge muna 2001 kana 2002," akadaro Akhlesh Lakhtakia, Godfrey Binder Purofesa weUinjiniya Sayenzi uye Mechanics. "Maitiro ese aripo parizvino haakodzeri kudzokororwa kwevazhinji. Muzviitiko zvakawanda unogona kugadzira replicas yakawanda sezvaunoda, asi iwe unoda chipembenene chekudzokorora kwega kwega. Izvi hazvina kunaka kune zvinangwa zveindasitiri."

Lakhtakia, achishanda naDrew Patrick Pulsifer, mudzidzi akapedza kudzidza muinjiniya sainzi uye makanika; Carlo G. Pantano, purofesa akatanhamara wesayenzi yezvinhu nouinjiniya uye mutungamiriri wePenn State’s Materials Research Institute; uye Raúl José Martín-Palma, purofesa weApplied physics, Universidad Autónomia de Madrid, Spain, vakagadzira nzira yekugadzira macroscale molds kana kufa zvinochengeta nanoscale features.

"Taida chinhu chakakura zvakakwana kuti tishandise icho chichiri chine nanoscale maficha," akadaro Lakhtakia.

Vatsvagiri vakasarudza maziso anobhururuka nekuti ane mukana wekushandisa mukugadzira masero ezuva. Nhunzi dzine maziso akakomberedzwa anenge ane hemispherical; asi mukati mehafu sphere iyoyo, nzvimbo yacho yakafukidzwa nemaziso macroscale ane hexagonal ane nanoscale features.

"Maziso aya akakwana pakugadzira masero ezuva nekuti anounganidza mwenje wezuva kubva munzvimbo yakakura pane kungoita mwenje unowira zvakananga panzvimbo yakati sandara," akadaro Lakhtakia.

Nekudaro, kuti ushande muchigadzirwa chakagadzirwa, iyo yepamusoro inoda kuchengetedza iyo yakazara dhizaini mune zvakakwana zvakakwana.

Vatsvakurudzi vakagadzirisa fly corneas pane girasi substrate uye vakazadza kumashure kwecorneas ne polydimethylsiloxane, silicone-based organic polymer, kuitira kuti chifukidziro chesimbi chavanoshandisa chirege kuona shure kwemaziso. Vakabva vaisa nickel pamusoro vachishandisa yakagadziridzwa fomu ye conformal-evaporated-film-by-rotation technique. Mune iyi tekinoroji, vaongorori vanonyungudika nemafuta izvo zvinoumba iyo yekuputira mukamuri yekutsvaira. Chinhu chinogashira coating chinomisikidzwa kune chibatiso uye chinotenderedzwa kamwechete mumasekonzi maviri ega ega.

Vatsvakurudzi vakashandisa maziso mapfumbamwe anoputika akaputirwa ne250 nanometers ye nickel. Iyi yekutanga template yakazoitwa electroform -- nzira ye electroplating - kuisa nickel kumusana kugadzira master template hafu yemirimita mukobvu. Ukobvu hwemaster template hunogona kunge hwakakora.

"Polymer replicas yakagadzirwa… kuburikidza nekukanda yakanyatsobudisa zvinhu zvema micrometer mashoma uye makuru muhukuru," vatsvakurudzi vakashuma mumagazini yepaIndaneti yeBioinspiration & Biomimetics.

Iyo master template inogona kushandiswa kungave sefa yekutsikisa pateni kana se mold. Chinangwa ndechekushandisa tenzi kufa / mold kuburitsa kwete chete mwanasikana anofa / mold, asi kutakura matemplate kuti akwanise kudhinda nzvimbo dzakakura. Vatsvagiri vangangowedzera template yavo kuti ibatanidze makumi matatu blowfly corneas.

"Chimwe chezvinhu zvakanaka pamusoro peiyo conformal coating senge iyi, inova nanograined," akadaro Lakhtakia. "Pamusoro pefa inova yakatsetseka saka iyo polymer ingangonamira."

Nzvimbo zhinji dzebiological dziripo dzinogona kugadzira nzvimbo dzekugadzira kune dzakasiyana siyana dzekushandisa. Vatsvagiri parizvino vari kutarisa mapapiro eshavishavi kuti vanzwisise kuti nzvimbo dzinogadzira sei mavara pasina pigment.

"Sezvineiwo, emerald ash borer, chipembenene chave chiri dambudziko munguva pfupi yapfuura muPennsylvania, inofambidzana neruvara," akadaro Lakhtakia. "Machira akagadzirwa nematehwe eganda remadota angakwezva varume here?"

Yakakurumbira nenyaya