In this paper, we report the direct synthesis of amphiphilic gold nanoparticles in chloroform in the presence of polyvinylpyrrolidone (PVP), which acts both as a capping and size-controlling agent. Unlike in previous works reporting the preparation of PVP-capped nanoparticles in highly polar solvents, the synthesis in chloroform allows obtaining amphiphilic nanoparticles without the need for additional treatment. Prepared gold nanoparticles can either spontaneously transfer into water or can be readily dissolved in the variety of different solvents yielding stable non-aggregated colloidal solutions. The amphiphilic nature of obtained nanoparticles widens their potential for the implementation in applications where the presence of water is undesirable or is to be avoided.

在本文中，我们报告了在聚乙烯吡咯烷酮（PVP）存在下，氯仿中两亲金纳米颗粒的直接合成，该聚乙烯吡咯烷酮既可作为封端剂，又可作为尺寸控制剂。与先前报道的在高极性溶剂中制备PVP封端的纳米粒子不同，氯仿中的合成无需额外处理即可获得两亲性纳米粒子。制备的金纳米粒子可以自发转移到水中，也可以很容易地溶解在各种不同的溶剂中，从而产生稳定的非聚集胶体溶液。所获得的纳米颗粒的两亲性质扩大了其在不希望存在或应避免存在水的应用中实施的潜力。