As Eric realizes, this is a critical issue for anyone wanting to replicated Rossi.
In fact, the material shown in the previous image, could indeed be called “micron sized” and one would not be dishonest. However the importance of hollow nickel tube could be the sine qua non of the Rossi scheme. Rossi has a history in his revelations, at least back when he was in full fund-raising mode, of first providing a bit too much information (inadvertently) and then backtracking later to try to minimize the damage. Thus, we often see conflicting statements which can be rationalized if one understands the history of “Rossi-speak”. This “tubule” mystery could be an exemplary example of what I am talking about. But did he actually ever say it? From: Eric Walker Does anyone have the citation for Rossi’s nickel lattice having “tubules”? Cannot find it. But check this out. Yes, please. If anyone has a reference to Rossi using nickel with "tubules," "nanotubules," "nanohairs," etc., please provide it. My understanding is that he uses micron-sized nickel powder, treated in some way, and rather than something "nano-". There are carbon nanotubes, of course, and Rossi, as far as anyone knows, does not use them. It's remarkably difficult to pin the precise details down and keep them pinned down. They keep on moving around and morphing through some kind of process of entropy. Eric

