4-(4-Biphenylyl)2,6-Diphenylphenol (DPP) 有機分子在超高真空 (UHV) 環境下以 77 K 的溫度吸附於 Au(111) 表面，其自組裝行為透過掃描隧道顯微鏡 (STM) 進行表徵。我們觀察到令人驚訝的多種表面分子結構，這些結構與基底 Au(111) 的人字形重構相關，並且受分子覆蓋率與溫度影響。這些分子結構反映出分子-分子與分子-基底相互作用之間的競爭。其中，一種分子結構受到人字形重構的影響，導致局部對稱性的破壞。

為了實現 DPP 分子中羥基的去氫作用，我們對樣品進行了逐步退火。目前，我們尚未找到證據表明在高溫退火 (T>260°C) 後，分子會發生去氫作用並形成 O-Au 配位鍵。去氫的具體溫度尚未確定，仍需進一步研究。

此外，本論文介紹了一種新的退火系統，並闡述其設計概念、加熱模組的組裝過程及所遇到的問題。該系統的性能由 Arduino 裝置測量，並展示出精確的退火溫度控制 (±4 K)。

The self-assembling behavior of organic 4-(4-Biphenylyl)2,6-Diphenylphenol (DPP) molecules adsorbed onto the Au(111) surface is characterized by scanning tunneling microscope (STM) at 77 K in an ultra-high vacuum (UHV) environment. A surprising variety of surface molecular structures is observed, which are related to the underlying Au(111) herringbone reconstruction, and these structures are coverage and temperature dependent. These molecular structures reflect a competition between molecule-molecule and molecule-substrate interactions. The herringbone reconstruction induces local symmetry breaking in one of the molecular structures.

Stepwise annealing of the sample is performed to achieve dehydrogenation of the hydroxyl in DPP. So far, we have not found evidence that molecules are dehydrogenated to form O-Au coordination bonds after high-temperature annealing (T>260°C). The specific temperature for dehydrogenation has not yet been resolved. Further investigation is warranted.

In addition, this thesis introduces a new annealing system and presents the design concepts behind it, as well as the assembly of the new heating stage and the issues encountered. The performance of the system is measured by an Arduino device and demonstrates a precise (±4 K) annealing temperature control.

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