Update nanosystems.html

nanosystems.html

@@ -455,7 +455,7 @@ <h1 id="other">What Other Techniques Besides AFMs Are Interesting?</h1>
 <p><b>There’s also HAL (hydrogen abstraction lithography) and PALE (patterned atomic layer epitaxy), but I haven’t read into those very much.</b> </p>
 
 <h1 id="addideas">Additional Ideas I've Discussed</h1>  
-<p><b>Meet in the middle manufacturing:</b> This idea has been brought up by J Storrs Hall, Stripe Press, Anna-Sofia, Jacob Swett, and others. <a href=”https://www.contrary.com/foundations-and-frontiers/molecular-manufacturing”>(Link to Anna-Sofia’s Article, which is the best source for this concept in my opinion.)</a> The rough idea is that one could pursue bottom up (Drexler and/or Synthetic Biology) and top down (traditional lithography, MEMs, E-beams, etc.)  methods to then “meet in the middle” as a way of achieving atomically precise manufacturing faster than just going after one approach solely. I believe that this is a very interesting idea, specifically E-beams and Drexler (nc-AFMs) combined for reasons I will spell out more in the future, but it doesn’t seem to be getting as much attention. Personally, I love ideas that focus on how we can be practical and get to APM as soon as physically possible. </p> 
+<p><b>Meet in the middle manufacturing:</b> This idea has been brought up by J Storrs Hall, Stripe Press, Anna-Sofia, Jacob Swett, and others. <a href="https://www.contrary.com/foundations-and-frontiers/molecular-manufacturing"> (Link to Anna-Sofia’s Article, which is the best source for this concept in my opinion.) </a> The rough idea is that one could pursue bottom up (Drexler and/or Synthetic Biology) and top down (traditional lithography, MEMs, E-beams, etc.)  methods to then “meet in the middle” as a way of achieving atomically precise manufacturing faster than just going after one approach solely. I believe that this is a very interesting idea, specifically E-beams and Drexler (nc-AFMs) combined for reasons I will spell out more in the future, but it doesn’t seem to be getting as much attention. Personally, I love ideas that focus on how we can be practical and get to APM as soon as physically possible. </p> 
 <p><b>Convergent Assembly:</b> Essentially, this was a conversation over Twitter/X that I had with Mark Friedenbach on 4/4/2024. I stated that I didn’t understand convergent assembly and the “middle” parts of molecular nanotechnology (namely, that molecular motors seem possible and that the math of “given this technology, here’s what it could do, such as the first chapter of nanosystems” seems to work, but the plan to go from Step 1 to Step 3 is very vague. Lukas Suss pointed out that Nanosystems intentionally had little content on bootstrapping and that “Sadly it is still the one and only technical book written on these kinds of diamondoid systems. A new book on new insights in friction mechanisms would be interesting. With focus on reproducible numbers.”). Mark then explained convergent assembly as such <a href=”https://twitter.com/MarkFriedenbach/status/1776085519505526842”   >here:</a> “Can you at least explain your understanding of what convergent assembly is? I suspect we are talking about very different things and that this is merely a definitional misunderstanding.For my side, convergent assembly is the natural extrapolation of the mechanical motion frequency scaling law: reducing linear dimensions by a factor to 1/10th increases frequency of operations by 10x.Small scale systems produce many parts quickly, and large scale systems assemble few parts slowly. So it becomes natural for larger scale systems to source parts from multiple smaller-scale systems, with each layer going up the chain operating at lower speed (but higher mass).The net result is constant mass throughput in the manufacturing system, allowing high-yield atomically precise manufacturing of macro-scale quantities of product.” Mark Also mentioned “Have you seen the concept of microblocks? That seems most likely to occupy the intermediate scale. Macro-scale products made of micron-scale parts with tiling geometry.” from the book Radical Abundance (2013), from Drexler. </p>