本論文是關於多晶鉑於真空、水及四乙基正矽酸鹽(TEOS)中，經過脈衝雷射剝熔蝕(PLA) 製程，產生特定晶相凝固顆粒和奈米凝聚物之相變化與聚簇行為研究。X-光和電子繞射結果顯示，於真空及水中藉由PLA轟擊多晶鉑的主要產物，主要是具有二維層狀與類似面心立方結構，無多重孿晶，但具有發達的~{111}鄰近表面的鉑奈米凝聚物與較大粒徑的fcc結構鉑凝固顆粒，互相聚簇成為多晶體，此多晶體若在鍍碳火棉膠銅網上可催化形成亂層石墨烯。
至於在水中藉由PLA轟擊多晶鉑，則造成額外的α-PtO2片狀顆粒，然而在TEOS中則產生額外的Pt-Si介金屬化合物顆粒，包括具有(110)滑移聚片雙晶（遵循[111](110)雙晶軸面）的摻碳斜方晶系PtSi，和具有序化的體心正方超晶格的摻碳Pt2Si1-x或Pt2Si1+x凝固顆粒與周邊二維層狀鉑奈米凝聚物互相非磊晶聚簇，而PtSi與面心立方結構鉑顆粒，則傾向依照[100]PtSi//[011]Pt; (001)PtSi//(100)Pt的晶向關係進行磊晶團簇。上述PLA製程雷射幕的鉑原子在團簇凝聚和固化的過程中會與碳素競爭反應，以至於石墨和石墨烯退居介穩狀態，極少出現。

This research is about the phase behavior of the particulates and condensates produced by a dynamic process of pulsed laser ablation (PLA) of platinum polycrystal in vacuum, water and tetraethyl orthosilicate (TEOS). X-ray and electron diffraction results indicated that the sample produced by PLA of Pt in vacuum and water consist of lamellae and fcc-based structure having negligible multiple twins yet with well-developed ~{111} vicinal surface for mutual coalescence as polycrystal which tended to activate the formation of turbostratic graphene on a C-coated collodion film. By contrast, PLA of Pt in water caused additional α-PtO2 platy particles whereas PLA of Pt in TEOS additional Pt-Si compounds, i.e. orthorhombic C-doped PtSi having (110) shuffled polysynthetic twinning by the [111](110) twin law and C-doped α-Pt2Si1-x or Pt2Si1+x having a body-centered tetragonal supercell. The C-doped PtSi and α-Pt2Si1-x or Pt2Si1+x particulates were formed separately for nonepitaxial coalescence with each other and with the lamellar Pt nanocodnesates; whereas the C-doped PtSi particulate was occasionally found to coalesce with the fcc-Pt particulate by the epitaxial relationship [100]PtSi//[011]Pt; (001)PtSi//(100)Pt with a fair 3-D lattice match. Due to competitive reaction of Pt and C, graphene and graphite hardly occurred by condensation and solidification of the laser plume in the above PLA processes.

壹、前言 1
貳、實驗流程 6
参、實驗步驟及方法 7
一、脈衝雷射剝蝕(PLA) 7
二、X光繞射分析(XRD) 7
三、UV-visible吸收光譜 8
四、穿透式電子顯微鏡(TEM) 8
五、偏光顯微鏡(POM) 8
六、X光-光電子能譜分析(XPS) 8
肆、實驗結果 10
一、XRD分析 10
二、UV-visible吸收光譜 10
三、穿透式電子顯微鏡(TEM) 10
四、X光-光電子能譜分析 15
伍、討論 16
陸、結論 21
柒、文獻參考 22

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