些经典的纳米图片包括些动画.docx

1、些经典的纳米图片包括些动画转一些经典的纳米图片（包括一些动画）纳米尺度的图片概念 x=W5e 0?.阿果资源网()版权所有 OJFWmZ(X.阿果资源网()版权所有 qP9p4c8i.阿果资源网()版权所有 真正的纳米尺度 JwcR&x.阿果资源网()版权所有 H|m1 .阿果资源网()版权所有 %mSv|.阿果资源网()版权所有 3m y_Gp.阿果资源网()版权所有 Carbon nanotube dative junction assembly U_wIx.阿果资源网()版权所有 u .*e.阿果资源网()版权所有 Dative (dipolar) bonds are a potenti

2、ally valuable form of noncovalent interaction for use in diamondoid and macromolecular nanostructures. These interactions require a lone pair donor, such as the lone pair of nitrogen, and an acceptor, such as the empty sp2 orbital or boron. Boron and nitrogen are both good structural replacements fo

3、r the C-H fragments found in hydrocarbons (nitrogen because it is isoelectronic with the C-H unit, boron because it can accommodate three covalent bonds to leave the last orbital empty). In this design, carbon nanotubes are functionalized with adamantane-based dative hinges that lock each fragment i

4、nto place to form the extended network. (grey = carbon, white = hydrogen, blue = nitrogen, green = boron; left: van der Waals rendering. right: ball-and-stick rendering) ;YrmT9Jx6.阿果资源网()版权所有 These designs are the result of a collaboration with Dr. Ralph Merkle into the application of the dative bon

5、d in molecular building block approaches for molecular-based materials design.Carbon nanotube dative junction assembly G#.q%Up.阿果资源网()版权所有 i&L!?6 5-f.阿果资源网()版权所有 r:t3Kf+E-.阿果资源网()版权所有 2GRv%:rZ.阿果资源网()版权所有 Crimp junctions for perpendicular carbon nanotube scaffolding | Yuh.阿果资源网()版权所有 Lr*LP6jx3.阿果资源网

6、()版权所有 In this design, two rigid diamondoid rings are fused at a quasi-tetrahedral junction and sized, through the addition or subtraction of repeat subunits in each ring, to accommodate two carbon nanotubes of different diameters. The crimping of the nanotubes is a result of van der Waals packing o

7、f the rings, a feature that can be enhanced or removed by adjusting the ring size. (grey = carbon, white = hydrogen, blue = nitrogen, red = oxygen) Bh65qHQO.阿果资源网()版权所有 /PELOs.阿果资源网()版权所有 xk s M e.阿果资源网()版权所有 QVkrhwp.阿果资源网()版权所有 Low-friction bearing assembly with two carbon allotropes vU9: beu.阿果资源网

8、()版权所有 |u+!CR.阿果资源网()版权所有 In this design, two diamondoid rings replace small segments of a carbon nanotube, providing a lock for a third, larger ring. The larger ring includes a stitch-work of oxygens to create an electron-rich interior whose effective circular van der Waals packing just touches tha

9、t of the nanotube framework. rbrh;jM.阿果资源网()版权所有 7R-2 wb?.阿果资源网()版权所有 9)R ED.阿果资源网()版权所有 uc/W/c u,.阿果资源网()版权所有 Rigid rod-based nanomechanical gear assembly w8a49Fv.阿果资源网()版权所有 HEw&.阿果资源网()版权所有 Here, a five-fold rotation axis in a single rigid rod is coupled to four rings composed of 15 subunits each

10、. A pagodanoid junction is included along this rigid rod to raise the five sections of the assembly to create an elevated gearing system. The image at left is a van der Waals representation. At right, only the oxygen and nitrogen atoms are shown (as spheres) to highlight the rod interior. (grey = ca

11、rbon, white = hydrogen, blue = nitrogen, red = oxygen) V)P8w#,.阿果资源网()版权所有 All images are the result of molecular mechanics structure calculations using either Tinker (MM2 parameters) or NAMD (CHARMM). Images were made with VMD. VMD and NAMD are developed with NIH support by the Theoretical and Comp

12、utational Biophysics group at the Beckman Institute, University of Illinois at Urbana-Champaign. Tinker is a product of the Ponder Lab in the Department of Biochemistry and Molecular Biophysics at the Washington University School of Medicine. E. Zelman and Apple Computer are thanked for their genero

13、us donation of resources. bAwKmk9C.阿果资源网()版权所有 cQm4q19.阿果资源网()版权所有 lc3Gu78 A/.阿果资源网()版权所有 sJC%/.阿果资源网()版权所有 纳米团簇的制备 7*JxeM.阿果资源网()版权所有 pdvnpzj.阿果资源网()版权所有 z+-oi.阿果资源网()版权所有 : +6l.阿果资源网()版权所有 Core/shell nanoparticles xiDgQTDz.阿果资源网()版权所有 WGW h.阿果资源网()版权所有 Gx6%Z$2n.阿果资源网()版权所有 QXN_ ?E,g/.阿果资源网()版权所有 x

14、7U=1y(.阿果资源网()版权所有 Gold Nano Anchors Put Nanowires in Their Place &9fQW?Czs.阿果资源网()版权所有 (+%96 .阿果资源网()版权所有 Scanning electron microscope image shows rows of horizontal zinc-oxide nanowires grown on a sapphire surface. The gold nanoparticles are visible on the ends of each row t ;or.阿果资源网()版权所有 i73h Y

15、T.阿果资源网()版权所有 Illustration shows how crystalline zinc oxide nanowires (blue) push seeds of gold nanoparticles (red) forward as they grow &h5Y_no GX.阿果资源网()版权所有 Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a technique for growing well-formed, single-cryst

16、al nanowires in placeand in a predictable orientationon a commercially important substrate. 1o%#kf .阿果资源网()版权所有 The method uses nanoparticles of gold arranged in rows on a sapphire surface as starting points for growing horizontal semiconductor wires only 3 nanometers (nm) in diameter. Other methods

17、 produce semiconductor nanowires more than 10 nm in diameter. NIST chemists work was highlighted in the Oct. 11 issue of Applied Physics Letters.* Sb/?.阿果资源网()版权所有 Part of the vision of nanotechnology is the possibility of building powerful, extraordinarily compact sensors and other devices out of a

18、tomic-scale components. So-called “nanowires”long thin crystals of, e.g., a semiconductor could not only link nanoelectronic devices like conventional wire but also function as devices themselves, tipped with photodetector or light-emitting elements, for example. BGCHE.阿果资源网()版权所有 An obvious stumbli

19、ng block is the problem of working with components so small that only the most sophisticated measurement instruments can even track them. To date, the most successful nanowire alignment method involved growing large numbers of the rod-like crystals on a suitable base like blades of grass, shearing t

20、hem off, mixing them in a solvent, and forcing them to align by either flow or surface confinement on the test substrate to orient most of the crystals in a specific horizontal direction. Further photolithography steps are required to ensure that nanowires are positioned correctly. BZ?3=S1*.阿果资源网()版

21、权所有 In contrast, the NIST technique grows arrays of nanowires made of zinc oxide, a semiconductor widely used in optoelectronics, with precise alignments. The gold anchors are placed with a chemical etching step and the orientation of the wireshorizontal, vertical or at a 60 degree angle from the su

22、rfaceis determined by tweaking the size of the gold particles. QIGUi,R.阿果资源网()版权所有 s Zymu8.阿果资源网()版权所有 51 q|-d.阿果资源网()版权所有 CLrX!JV.阿果资源网()版权所有 Anatomy of a Nanoprobe :snO*Zg .阿果资源网()版权所有 9Q;=R.阿果资源网()版权所有 c C3Ff.阿果资源网()版权所有 bCj_CX1(.阿果资源网()版权所有 ) cgRb.阿果资源网()版权所有 Bkcwl.阿果资源网()版权所有 Magnetic field of

23、an iron crystal inside a carbon nanotube p Cz6*kC.阿果资源网()版权所有 Xoj rR9|.阿果资源网()版权所有 This image won First Prize in the Science Close-Up category in the Daily Telegraph Visions of Science competition. The image shows a multi-walled carbon nanotube, approximately 190nm in diameter, containing a 35-nm-diameter iron crystal encapsulated inside it. Ele