Depending on your research work,

ACS Nano Letters:

https://www.google.co.in/search?q=acs+nano+letters&oq=ACS++nan&aqs=chrome.2.69i57j35i39j0l4.5876j0j8&sourceid=chrome&ie=UTF-8

• If you have an access to the WOS database, you can follow to journal citation reports: http://jcr.incites.thomsonreuters.com/JCRJournalHomeAction.action?year=&edition=&journal= and select a category (for example, nanoscience and nanotechnology) to rank journals.
• If you don't have, try this one http://eigenfactor.org/projects/journalRank/rankings.php?bsearch=nano&searchby=journal&orderby=eigenfactor

Nature Nanotechnology (IF=39) is probably the best one:

https://www.nature.com/nnano/

Hope the attached link helps you.

https://www.researchgate.net/post/List_of_Nanotechnology_journals

Dear Muneer Al-Da'amy,

The Best Journal for publishing in nanotechnology as on date 30-12-2018 is,

"Nature Nanotechnology" with Impact factor: 38.986 (2016).

List of Few Good Nanotechnology Journals with Good Impact Factor :

(Note: As on date 30-12-2018)

01. Advanced Materials with Impact factor: 21.950 (2017)

02. Nano Today with Impact factor: 17.476 (2017)

03. Journal of the American Chemical Society with Impact factor: 14.357 (2017)

04. ACS Nano with Impact factor: 13.709 (2017)

05. Nano Energy with Impact factor: 13.120 (2017)

06. Angewandte Chemie with Impact factor: 12.102 (2017)

07. Nano Letters with Impact factor: 12.080 (2017)

I hope I have answered your question.

With Best Wishes,

Samir G. Pandya

Please also refer to the following article that contains how we can choose a good journal also it contains the JournalCitation Report (JCR) 2017 and 2018

https://www.researchgate.net/post/How_can_I_get_the_Impact_factor_of_a_journal

Following