Accelerating Future Transhumanism, AI, nanotech, the Singularity, and extinction risk.

27May/1063

New Paper: Optimal Tooltip Trajectories in a Hydrogen Abstraction Tool Recharge Reaction Sequence for Positionally Controlled Diamond Mechanosynthesis

Robert Freitas alerts me to a new mechanosynthesis paper published by the Nanofactory Collaboration group in the Journal of Computational and Theoretical Nanoscience. Here's some info:

Denis Tarasov, Natalia Akberova, Ekaterina Izotova, Diana Alisheva, Maksim Astafiev, Robert A. Freitas Jr., “Optimal Tooltip Trajectories in a Hydrogen Abstraction Tool Recharge Reaction Sequence for Positionally Controlled Diamond Mechanosynthesis,” J. Comput. Theor. Nanosci. 7(February 2010):325-353 [29 pages]

It is our first published paper with our Russian collaborators and is now available online. This paper represents the first extensive DMS (Diamond Mechno-Synthesis) tooltip trajectory analysis, examining a wide range of viable multiple degrees-of-freedom tooltip motions in 3D space that could be employed to recharge the hydrogen abstraction tool, a key reaction set in DMS.

Abstract:

The use of precisely applied mechanical forces to induce site-specific chemical transformations is called positional mechanosynthesis, and diamond is an important early target for achieving mechanosynthesis experimentally. A key step in diamond mechanosynthesis (DMS) employs an ethynyl-based hydrogen abstraction tool (HAbst) for the site-specific mechanical dehydrogenation of H-passivated diamond surfaces, creating an isolated radical site that can accept adatoms via radical-radical coupling in a subsequent positionally controlled reaction step. The abstraction tool, once used (HAbstH), must be recharged by removing the abstracted hydrogen atom from the tooltip, before the tool can be used again. This paper presents the first theoretical study of DMS tool-workpiece operating envelopes and optimal tooltip trajectories for any positionally controlled reaction sequence – and more specifically, one that may be used to recharge a spent hydrogen abstraction tool – during scanning-probe based ultrahigh-vacuum diamond mechanosynthesis. Trajectories were analyzed using Density Functional Theory (DFT) in PC-GAMESS at the B3LYP/6-311G(d,p) // B3LYP/3-21G(2d,p) level of theory. The results of this study help to define equipment and tooltip motion requirements that may be needed to execute the proposed reaction sequence experimentally and provide support for early developmental targets as part of a comprehensive near-term DMS implementation program.

So, what does it mean? Well, in the Freitas-Merkle mechanosynthetic tooltip design, there are three primary tasks for three primary tools -- 1) abstracting (removing) hydrogen from a carbon surface (carbon surfaces tend to have a monoatomic layer of hydrogen), 2) placing a carbon dimer (C=C) on a hydrogen-free carbon surface, then 3) putting down a hydrogen to cover up the surface and prevent it from spontaneously rearranging itself or otherwise engaging in unwanted reactions. This paper zooms in on a specific part of tool #1, the "recharge sequence" portion, where the abstraction tool gets rid of the hydrogen it just grabbed from a surface and gets ready to grab again.

Comments (63) Trackbacks (0)
  1. Wow, thatís what I was searching for, what a stuff! present here at this website, thanks admin of this web site.

    • Great To Read. Good Job, Keep Posting.

    • I was guessing if You Could write a little more on this subject? I’d be very grateful if You Could elaborate a little bit more.

    • I found this post very exciting. I think you will have any other post on this topic? I am also sending it to my friend to enjoy your working style. Cheers!

    • Thanks for this marvelous posting! I certainly enjoyed reading it, you are a great author

      Greetings from

    • For that reason, the 60s and 70s still appear to
      be receiving that message. Most of electric autos, simply because the batteries need to be recharged regularly
      so they were not achieving the fuel economy important?
      Thus back to our instance study google on Susan Boyle. Older kids can use slot cars to complete the track and, in a report by google Japanese paper Yomiuri Shimbun.
      While google that may seem like a deal could end up saving the consumer thousands of dollars.
      Auto Dealers –

    • Nevertheless, in the markets pulse form of bartering, as discussed below.

      9%, replicating the pattern seen in Greece as the worst performer in the EU, but this
      being New York City. Dropshipping services coming from gadgets wholesaler also
      lessen working costs, as well as Wang LeeHom, a very healthy
      growth.

      Also visit my blog ::

  2. hello there how are you shirt

  3. how to write hello how are you in korean

  4. Find the knowledge and remarks here really worthy go through.

  5. I’m new to building web sites and I was wanting to know if having your site title related to your articles and other content really that important? I notice your title, “New Paper: Optimal Tooltip Trajectories in a Hydrogen Abstraction Tool Recharge Reaction Sequence for Positionally Controlled Diamond Mechanosynthesis | Accelerating Future ” does seem to be spot on with what your website is about however, I prefer to keep my title less content descriptive and based more around site branding. Would you think this is a good idea or bad idea? Any assistance would be greatly appreciated.

  6. An ingesting speech is couturier be aware. I expect that you need to write much for this topic, it durability not be a sacred person but mostly group are certainly not enough to be able to talk upon much subjects. To the succeeding. Cheers similar to your Khmer Karaoke Superstars .

  7. I sorry for my English.Well I really liked studying it. This article offered by you is very effective for good planning.

  8. certainly like your website but you have to check the spelling on quite a few of your posts. Many of them are rife with spelling problems and I find it very bothersome to tell the truth nevertheless I’ll definitely come back again.

  9. I have read a few excellent stuff here. Certainly worth bookmarking for revisiting. I surprise how so much attempt you put to create such a excellent informative web site.

  10. Interesting website, i read it but i still have a few questions. shoot me an email and we will talk more becasue i may have an interesting idea for you.

  11. some genuinely choice content material on this internet internet site , saved to my bookmarks .

  12. then naturally it will be a lot more than you expected. There is nothing in this world which comes straightforward. Every thing in this world is quite tough to get and the competition for finding the things has become very much tough.

  13. This douche bag loves his illegal bretheren because hes a itiaen of the world and we ought to be ashamed of ourselves I got news for you Asswipe get your asswiping ass back towards the craphole exactly where you came from with all of your illegal beaners

  14. Hiya, I’m truly glad I have discovered this info. Today bloggers publish just about gossips and net and this really is in fact frustrating. A very good internet internet site with intriguing content material, that is what I need to have. Thank you for keeping this web website, I’ll be visiting it. Do you do newsletters? Can’t discover it.

  15. I’d ought to talk to you here. Which is not some thing Which i do! I like reading an write-up that can make folks believe. Also, thank you for permitting me to comment!

  16. there are actually wall mirrors exactly where at edges are created up of anodized aluminum and they do not stain as well significantly,

  17. Your style is really unique in comparison to other folks I’ve read stuff from. Thanks for posting when you have the opportunity, Guess I’ll just bookmark this page.

  18. This internet site is truly a walk-through it really will be the info you wished with this and didn’t know who must. Glimpse right here, and you’ll undoubtedly learn it.

  19. I am sorry, that has interfered… I recognize this question. It truly is potential to go over.

  20. It is a shame you don’t have a donate button! I’d unquestionably donate to this brilliant weblog! I suppose for now i’ll settle for book-marking and adding your RSS feed to my Google account. I appear forward to fresh updates and will share this website with my Facebook group. Chat quickly!

  21. ohh man you save me a lot of time . i will go through your list and check which one is the best for my business .|

  22. hello there and thank you for your info – I have undoubtedly picked up something new from right here. I did nonetheless expertise several technical issues employing this internet site, as I experienced to reload the web internet site lots of times previous to I could get it to load properly. I had been wondering if your web hosting is OK? Not that I’m complaining, but sluggish loading instances times will very regularly affect your placement in google and could damage your quality score if advertising and marketing with Adwords. Nicely I am adding this RSS to my e-mail and can look out for much more of your respective exciting content. Make confident you update this once more soon..

  23. whoah this weblog is fantastic i like studying your articles. Keep up the good work! You know, lots of individuals are hunting round for this information, you can aid them greatly.

  24. That’s Too nice, when considering in india hope it can come up with a Rocking destination for youngster.. hope that will true.

  25. I think this is among the most vital information for me. And i am glad reading your article. But want to remark on some general things, The website style is ideal, the articles is really great : D. Good job, cheers

  26. I was examining some of your articles on this site and I think this website is rattling instructive! Here ??????? ??????? ??????? Keep posting .

  27. My partner and I stumbled over here from a different page and thought I might as well check things out. I like what I see so now i am following you. Look forward to looking into your web page again.

  28. Can I simply say what a relief to find someone who truly is aware of what theyre speaking about on the internet. You positively know the way to carry a difficulty to mild and make it important. More people have to read this and understand this side of the story. I cant consider youre not more common since you positively have the gift.

  29. F*ckin’ tremendous things here. I am very glad to see your post. Thanks a lot and i am looking forward to contact you. Will you please drop me a e-mail?

  30. It is in reality a great and helpful piece of info. I’m satisfied that you simply shared this helpful info with us. Please stay us informed like this. Thank you for sharing.

  31. Spot on with this write-up, I truly assume this web site needs much more consideration. I’ll probably be once more to read rather more, thanks for that info.

  32. This really answered my drawback, thanks!some tips here!

  33. There’s noticeably a bundle to learn about this. I assume you made sure good factors in features also.Useful info!

  34. It’s exhausting to seek out knowledgeable people on this matter, however you sound like you already know what you’re talking about! Thanks

  35. An added important component is that if you are a senior, travel insurance with regard to pensioners is something you ought to really take into consideration. The more mature you are, the greater at risk you’re for making something terrible happen to you while in most foreign countries. If you are not necessarily covered by several comprehensive insurance policies, you could have quite a few serious troubles. Thanks for expressing your good tips on this web blog.

  36. There are actually lots of particulars like that to take into consideration. That could be a nice point to convey up. I supply the thoughts above as normal inspiration but clearly there are questions just like the one you convey up the place the most important thing might be working in sincere good faith. I don?t know if greatest practices have emerged round things like that, however I am sure that your job is clearly recognized as a good game. Each boys and girls feel the affect of just a second’s pleasure, for the rest of their lives.

  37. There are definitely a variety of particulars like that to take into consideration. That could be a nice point to convey up. I provide the thoughts above as general inspiration but clearly there are questions like the one you bring up the place an important thing shall be working in sincere good faith. I don?t know if finest practices have emerged round things like that, but I’m positive that your job is clearly recognized as a good game. Each girls and boys feel the impression of only a second’s pleasure, for the rest of their lives.

  38. Your place is valueble for me. Thanks!…some tips here!

  39. There are definitely quite a lot of details like that to take into consideration. That is a nice level to bring up. I offer the ideas above as normal inspiration but clearly there are questions like the one you convey up where a very powerful factor shall be working in trustworthy good faith. I don?t know if greatest practices have emerged round issues like that, but I’m positive that your job is clearly identified as a good game. Both boys and girls feel the influence of only a second’s pleasure, for the rest of their lives.

  40. You made some respectable factors there. I regarded on the web for the issue and located most individuals will go together with along with your website.some tips here!

  41. There is noticeably a bundle to learn about this. I assume you made sure nice factors in options also.some tips here!

  42. very good submit, i certainly love this web site, keep on itUseful info!

  43. very good put up, i definitely love this website, keep on itUseful info!

  44. When I initially commented I clicked the -Notify me when new feedback are added- checkbox and now each time a comment is added I get 4 emails with the identical comment. Is there any means you possibly can remove me from that service? Thanks!

  45. It’s laborious to find educated folks on this subject, but you sound like you already know what you’re talking about! Thanks

  46. There may be noticeably a bundle to know about this. I assume you made sure nice points in options also.some tips here!

  47. An attention-grabbing dialogue is price comment. I feel that it’s best to write extra on this matter, it may not be a taboo subject however usually persons are not enough to speak on such topics. To the next. Cheersmore tips i found on!

  48. This web page can be a stroll-by way of for the entire info you wanted about this and didn’t know who to ask. Glimpse right here, and also you’ll definitely discover it.

  49. I am preparing my assignment paper and gathering information on this topic. Your post is one of the better that I have read. Thank you for putting this information into one place.

  50. Quality posts is the main to be a focus for the visitors to go to see the
    website, that’s what this web site is providing.

  51. Helpful info. Fortunate me I found your web site unintentionally, and I’m surprised why this coincidence didn’t happened earlier! I bookmarked it.

  52. ???????????????????????????????????????? ????????????????
    ???????????????? ?????????????????????????????????????????? ?????????????????????????????
    ???????????????????????????????????????????? ????????????????????????
    ???????????????????

    ??????????????????
    ???????? 1? GOMPlayer????????????????

  53. It’s prudent to use caution when using products such as Hydroxycut–even though it does not contain ephedra–and check with your doctor.
    There are many people around the globe who suffer from some Sleep Disorder or the other and do not know how to get rid of it.

    This just isn’t cheating but a reference or an example paper that you just could use for the paper.
    If you did not know the person well, you can focus your letter on the family
    and give your support in this difficult time. thereafter zendaslim reviews Writing articles the correct way is actually
    quite easy once you get the hang from it. The first is
    to submit a write-up and get views, just like at Associated Content
    and Bukisa.

  54. Enraging individuals that are punishing you isn’t an excellent idea in different circumstance.
    But inside long run you is going to be slowly eroding your individual relationship while using children you like and alienating their affection.

    As Google said ‘ you are able to’t expect to remain entirely private while
    still using alternative party services but which doesn’t mean you should ignore them
    altogether. There’s nothing you are able to say that
    would find yourself getting me on that plane now.

    When they implement to advanced schooling, they are going to have
    a variety of articles to sketch from. The author doesn’t readily excessive volume of adjectives, but the ones she chooses are powerful.
    here acer chromebook c710-2856 s experiences: if they
    may be satisfied with the work done or not really and several other ones.
    For example, you might write about the way you
    were discriminated against because you were different, or that you just only
    had a couple of friends because others stayed away by you.


Leave a comment

No trackbacks yet.