Abstract We present a green route of synthesis of germanium nanocrystals by cryomilling. The particles (∼ 80 nm) are further functionalized with acrylic acid and dispersed in the isopropyl alcohol (IPA) medium to obtain colloidal ink suitable for inkjet printing under ambient atmosphere to form device grade structure. Printing on silicon wafers presents a complex problem of coffee-ring pattern formation that hinders the printing quality. Enhancing the printing quality can be realized by controlling the hydrophobicity of the silicon surface by optimizing termination of the surface bond through a cleaning protocol and temperature of printing. Through a simple model architecture using n-type Si (001) substrate, the diode performance of the Si/Ge printed heterostructure that has the potential to evolve into a cost-effective development of semiconducting devices is demonstrated.

中文翻译：

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锗纳米墨水的绿色合成及Si/Ge异质结构的喷墨打印

摘要 我们提出了一种通过低温研磨合成锗纳米晶体的绿色途径。颗粒（~80 nm）进一步用丙烯酸官能化并分散在异丙醇（IPA）介质中，以获得适合在环境气氛下喷墨打印的胶体墨水，以形成器件级结构。在硅晶片上印刷存在一个复杂的咖啡环图案形成问题，这会影响印刷质量。通过清洁协议和印刷温度优化表面结合的终止，可以通过控制硅表面的疏水性来提高印刷质量。通过使用 n 型 Si (001) 衬底的简单模型架构，