I am trying to coat gold nanostars with mesoporous silica shell but many AuNSs are coated with silica instead of one individual nanostar. Anyone has any idea why and what I can do to have one nanostar coated with silica.
Amjad Iqbal Falak Yes, I use sol-gel method, I first coat the nanostarts with CTAB and the TEOS, EtOH and ammonium solution
Hi Hanieh, The issue you are experiencing may be due to the synthesis conditions or the properties of the AuNSs. It's possible that the AuNSs are aggregating or clustering together during the coating process, which could result in multiple nanostars being coated with silica instead of individual nanostars.
One potential solution to this problem is to try modifying the synthesis conditions to prevent aggregation or clustering of the AuNSs. This could involve optimizing the pH, temperature, or reaction time of the coating process to promote the formation of individual nanostars. Another solution could be to modify the surface of the AuNSs prior to coating to make them less likely to aggregate or cluster.
It may also be helpful to consult with other researchers or experts in the field who have experience with similar coating processes to gather additional insights and suggestions for optimizing your coating process.
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