快速掃描探針顯微鏡有這么多實用性,確定要錯過嗎?
更(geng)新(xin)時(shi)間:2023-03-07瀏覽:922次
快速掃描探針顯微鏡是一(yi)種(zhong)新型(xing)的(de)探(tan)針(zhen)顯(xian)微鏡(jing)(jing)(jing),是從掃描(miao)隧道(dao)顯(xian)微鏡(jing)(jing)(jing)的(de)基礎上發展起來(lai)的(de)各種(zhong)新型(xing)探(tan)針(zhen)顯(xian)微鏡(jing)(jing)(jing)(原子(zi)(zi)力顯(xian)微鏡(jing)(jing)(jing),靜電(dian)力顯(xian)微鏡(jing)(jing)(jing),磁力顯(xian)微鏡(jing)(jing)(jing),掃描(miao)離子(zi)(zi)電(dian)導顯(xian)微鏡(jing)(jing)(jing),掃描(miao)電(dian)化(hua)學顯(xian)微鏡(jing)(jing)(jing)等(deng))的(de)統(tong)稱。基本工作原理(li)是利用探(tan)針(zhen)與樣(yang)品(pin)表(biao)面原子(zi)(zi)和(he)分子(zi)(zi)之間的(de)相(xiang)互作用,即當探(tan)針(zhen)與樣(yang)品(pin)表(biao)面接(jie)近納米尺度(du)時,形成(cheng)各種(zhong)相(xiang)互作用的(de)物理(li)場,通過檢測相(xiang)應的(de)物理(li)量,得到樣(yang)品(pin)的(de)表(biao)面形貌。掃描(miao)探(tan)針(zhen)顯(xian)微鏡(jing)(jing)(jing)由探(tan)頭、掃描(miao)儀、位移傳(chuan)感器、控制器、檢測系統(tong)和(he)圖像(xiang)系統(tong)組成(cheng)。
快速掃描探針顯微鏡的特點:
1、除了場(chang)離子(zi)(zi)(zi)(zi)顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)和高分(fen)辨(bian)(bian)率(lv)(lv)(lv)透射(she)電子(zi)(zi)(zi)(zi)顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)外(wai),掃(sao)描探針顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)是在場(chang)離子(zi)(zi)(zi)(zi)顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)和高分(fen)辨(bian)(bian)率(lv)(lv)(lv)透射(she)電子(zi)(zi)(zi)(zi)顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)后,在原子(zi)(zi)(zi)(zi)尺度上觀(guan)(guan)察物質結構的第三類顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)。以(yi)(yi)掃(sao)描隧道顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(STM)為(wei)(wei)例,其(qi)橫向分(fen)辨(bian)(bian)率(lv)(lv)(lv)為(wei)(wei)0.1~0.2nm,縱向深度分(fen)辨(bian)(bian)率(lv)(lv)(lv)為(wei)(wei)0.01nm,可以(yi)(yi)清晰地觀(guan)(guan)察到分(fen)布在樣品表面的單個(ge)原子(zi)(zi)(zi)(zi)或分(fen)子(zi)(zi)(zi)(zi)。同(tong)時,在空氣、其(qi)他氣體或液體環境中也可以(yi)(yi)觀(guan)(guan)察到掃(sao)描探針顯(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)。
2、掃描探針顯(xian)微(wei)鏡具有原(yuan)子(zi)(zi)分辨率、原(yuan)子(zi)(zi)輸運、納米(mi)微(wei)加工(gong)等特點,但(dan)由于(yu)各(ge)種(zhong)掃描顯(xian)微(wei)鏡的工(gong)作(zuo)(zuo)原(yuan)理不(bu)同,其(qi)結(jie)果反映了樣品表(biao)面的不(bu)同信(xin)(xin)息(xi)。掃描隧道顯(xian)微(wei)鏡(STM)測量樣品表(biao)面的電(dian)子(zi)(zi)工(gong)位的分布信(xin)(xin)息(xi),該(gai)信(xin)(xin)息(xi)具有原(yuan)子(zi)(zi)分辨率,但(dan)仍不(bu)能(neng)獲得樣品的真實結(jie)構(gou)。原(yuan)子(zi)(zi)顯(xian)微(wei)鏡檢測原(yuan)子(zi)(zi)間相互(hu)作(zuo)(zuo)用的信(xin)(xin)息(xi),從而獲得原(yuan)子(zi)(zi)在(zai)樣品表(biao)面排列的信(xin)(xin)息(xi),這是樣品的真實結(jie)構(gou)。另一方面,原(yuan)子(zi)(zi)力顯(xian)微(wei)鏡無法測量與理論相比(bi)較的電(dian)子(zi)(zi)狀態信(xin)(xin)息(xi),因此(ci)它們各(ge)自具有較短的長度。