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The first example of an artificial molecular machine (a switchable molecular shuttle). The positively charged ring (blue) is initially positioned over the benzidine unit (green), but shifts to the biphenol unit (red) when the benzidine gets protonated (purple) as a result of electrochemical oxidation or lowering of the pH. [10]
The dispute was about the feasibility of constructing molecular assemblers, which are molecular machines which could robotically assemble molecular materials and devices by manipulating individual atoms or molecules. The concept of molecular assemblers was central to Drexler's conception of molecular nanotechnology, but Smalley argued that ...
In 1992, Drexler published Nanosystems: Molecular Machinery, Manufacturing, and Computation, [45] a detailed proposal for synthesizing stiff covalent structures using a table-top factory. Diamondoid structures and other stiff covalent structures, if achieved, would have a wide range of possible applications, going far beyond current MEMS ...
Molecular machines a molecule that mimics the function of macroscopic machines. Subcategories. ... Molecular machine; Molecular motor; Molecular propeller;
His Ph.D. work was the first doctoral degree on the topic of molecular nanotechnology and his thesis, "Molecular Machinery and Manufacturing with Applications to Computation", was published (with minor editing) as Nanosystems: Molecular Machinery, Manufacturing and Computation (1992), which received the Association of American Publishers award ...
A number of machine elements provide important structural functions such as the frame, bearings, splines, spring and seals. The recognition that the frame of a mechanism is an important machine element changed the name three-bar linkage into four-bar linkage. Frames are generally assembled from truss or beam elements.
A nucleic acid robot (nubot) is an organic molecular machine at the nanoscale. [43] DNA structure can provide means to assemble 2D and 3D nanomechanical devices. DNA based machines can be activated using small molecules, proteins and other molecules of DNA.
A molecular assembler is a kind of molecular machine. Some biological molecules such as ribosomes fit this definition. This is because they receive instructions from messenger RNA and then assemble specific sequences of amino acids to construct protein molecules. However, the term "molecular assembler" usually refers to theoretical human-made ...