Phytochemical nano-synthesis involves the use of plant's extract as a reducing entity. However, as simple and cheap as this may seem, the technique has faced many challenges overtime. So what are the major challenges of phytochemical nanomaterials synthesis. The options include but not limited to

• high water solubility
• particle aggregations
• crystallinity problems?
• complex mechanism of synthesis etc
• Please share your opinion to gain more knowledge.
• Thank you.