So what do you want to talk about?
Your 'nanobot' idea seems to presuppose that we know the relevant (to consciousness and personality) function of every neuron in the human nervous system. (It isn't just neurons. There's an endocrine aspect to mood and personality as well, the action of hormones and so on. We would need to capture that too.) Not only that, we would need to know how all of these neurons interact with one another in the neural network. (There are many billions of neurons, each with multiple synapses.) The complexity of just the description and mapping task appears overwhelming. Then we would have to develop a way to replace every one of those neurons with a functionally equivalent 'nanobot'. (It might be easier to model the functional network in a supercomputer.)
While one might think about it hypothetically, it does't sound even remotely possible in real life. Certainly not in this day and age. Maybe for some future neurobiology and technology. In 2019, it's just science-fiction.
never mind the endocrine aspect and the hormones and all of that, I am fine without mood, it has only brought me trouble.
the way that neurons interact with one another is based largely on the basic structure of the brain, the way these neurons are arranged in relation to one another, and on micro tubules inside them which probably encode memory because when they deteriorate it results in severe memory loss due to an injection of colchine into the brain.
colchine being a drug which inhibits microtubule polymerisation by binding to tubulin, and thus messes up microtubules.
so, when this microtubules are messed up, memory loss ensues, but that's probably just a coincidence, even though this has been tested using many other microtubule disrupting drugs as well.
so, recollections correlate with certain patterns of neural activity, indicating that these patterns of neural activity cause the recollections, and the deterioration of micro tubules results in memory loss, indicating that micro tubules encode memory.
and that the encryption of a certain memory on these micro tubules determines the pattern of neural activity relevant to the encoded memory.
I do not believe synapses themselves to be incredibly relevant, because I believe that the way they fire is determined mainly by things other than themselves, things that can be replicated by nano robots.