近年來，人們對於環境污染和人口高齡化的關注逐年提高。因此，我們將致力於減少金屬離子的危害和預防阿茲海默症病患的增加，開發一種新型具高靈敏度、多功能化，且可用於感測的奈米材料。汞二價離子被認為是重金屬中毒性最強和最普遍的環境污染物之一，可對大腦和中樞神經系統造成永久性損害。 所以，定量水中的汞離子對於預防汞中毒具有重要意義。 此外，阿茲海默症在神經退行性疾病中是非常關鍵的，有報告指出，2015年至2020年發病率增加了17.5%，國際阿茲海默症協會也預測2050年全球患者將達到1.38億，讓阿茲海默症成為全球性的重大問題。 因此，研發一種可快速且靈敏感測阿茲海默症生物標誌物的表面增強拉曼基材對於早期治療具有重要意義。
銀納米糰簇是一種新型金屬光致發光納米材料，具有獨特的電子躍遷和電漿子性質，可用作熒光探針和增強底物，用於環境監測和生物傳感。 在這項研究中，我們採用常壓微電漿作為一種快速且無毒的方法來合成膠體銀團簇，使其成為一種具有吸引力的納米材料。 為了確保生物相容性並減少對人類和環境的潛在危害，我們在合成過程中使用穀胱甘肽和檸檬酸鈉作為包覆劑，穩定合成的銀團簇。
銀團簇可作為光致發光傳感中汞二價離子的熒光納米探針，檢測限為1.76 nM，低於美國環境保護署對飲用水中汞二價離子規定的10 nM監管限值。 此外，我們還成功實現了使用銀團簇對澱粉樣蛋白-β (1-42) SERS 的無標記檢測，獲得了 1 pM 的高靈敏度檢測限，可低於阿茲海默症患者唾液中發現的疾病濃度。 這在未來應用於阿茲海默症的早期診斷方面具有巨大潛力，為疾病檢測提供了方便、有效的方法。

In recent years, people have paid more attention to environmental pollution and population aging issues. In our research, we will improve and prevent the harm of metal ions and the growth of Alzheimer's disease. Hg2+ is considered one of the most toxic and prevalent environmental pollutants among heavy metals and can cause permanent damage to the brain and central nervous system. Therefore, quantifying mercury ions in water is significant for preventing mercury poisoning. In addition, Alzheimer's is vital for neurodegenerative disease, there is a report indicating that predicts that patients in the world will reach 138 M in 2050 by Alzheimer's Disease International, let Alzheimer's become a critical global issue. Therefore, the development of a rapid and sensitive enhanced substrate for Alzheimer's biomarkers SERS is important for early treatment. Silver nanoclusters (Ag NCs) are a new type of metal photoluminescence nanomaterial with unique electronic transition, and plasmonic properties that can be used as fluorescent probes and enhanced substrates for environmental monitoring and biological sensing. In this study, we employ atmospheric pressure microplasma as a rapid and and non-toxic method for synthesizing colloidal Ag NCs, making it an attractive nanomaterial. To ensure biocompatibility and reduce potential harm to humans and the environment, we employ glutathione and sodium citrate as capping agents to stabilize the synthesized Ag NCs during the synthesis process. Ag NCs can serve as fluorescent nanoprobes for Hg2+ in photoluminescence sensing and get the low limit of detection (LoD) of 1.76 nM, which is lower than the regulatory limits of 10 nM for Hg2+ in drinking water set by the US EPA. Furthermore, we successfully achieved label-free detection of Amyloid-β (1-42) SERS with Ag NCs, obtaining the LoD of 1 pM, lower than the disease concentration found in human saliva. This holds great potential for future applications in the early diagnosis of Alzheimer's disease, offering convenient and efficient means for disease detection.

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