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LettI{ Rir NShe200YO{ (WVQY͑f[/gO NY!kZP'YObJTbbJT _wVQY TLv^lsQl0<--Jm + 0nn  Blu1u3 &SN'Yf[irtf[bQZ`irtNPgeirt@b '$,  <xu3fQ"`# ,http:/events/icmp10s.xml,-, 0&D  S ~ġurkrk ԔԔ8c8c?p# QZ`irt-SN'Yf[[W, 'X ,$  BȮu("`S#c *YkyQTHz lk/fcsN300 GHz0R10 THz v^vlN1ks|0R30_s| NNks|lN~YIQKNv5uxl1:SW0[(Wirtf[0Pgeyf[0u}Tyf[0)Yef[0Oo`yf[NSV2[hQI{ebwQ g͑'Yv^(uMRof0THz\nNcKmhV/fTHzk^(uvsQ.hVN0(WOYTHz\vNue_-N WNJS[SOvTHzϑP[~ToIQhVQCL 1uNvQϑlbcHesؚ0SOy\0{OTfƖbI{Op b:N,gWvxvzppKNN0 igA '  BuHa"`>^' hrTHzϑP[1cKmhVTHzQWP /f~YϑP[1cKmhVTTHzlkv^8O /fN{|͑vTHz\cKmhV0N_lOvk THzOwQ gf:_vO['`Tf[v&^[ yr+RTNkSfO /f NNNOb/gsQlv͑pKNN0,gbJT\bSTHzhVNirt0THzQCLvyraSW!jb0_(~gPgeu0hVN]z0hVNKmՋNSWNTHzQCLTTHzQWPveN Oo:yI{ebvxvzۏU\  ig  2H  0+nF ? 33___PPT10i.JPx+D=' = @B +rib#`iEb#1(6%4 / 0DArial 00TT0vܖ 0ܖ"D[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0<pPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#    0 )!0(  r  S MuZ#   u N  C &Aautumn6%4  ZXupp9? s 2010t^,{15g  '0$|  BHZu?Ay Te9g16efgV 15:00 16:40 0WpSN'Yf[irt'Y|i-N212Ye[ ++'-f3d V  Ngu?kk$  dFabrication and Imaging of 2D Nanomembranes and Graphene using Electron and Helium Ion Microscopes ee(4 +   <tu3fQ"`3#$}4 Photograph by Xiaodong Hu,  Hvu3s?"`\ c Prof. Armin Glzhuser0&0&<.   <dzu/31 @PT|N: llYec 5u݋62767809 bshen@pku.edu.cn~) g-g  gN   Bu\O"``)3"~/ 4vfOڋ 7u 1967t^Qu ZSX -Nyb Nwm_|~NOo`b/gxvz@bxvzXT0ZSXu[^0Oo`RPgeV[͑p[[;NN0V[pgQRt^Wё_0-Nyb ~vNR 0 Nwm^6qyf[ar9NVY_0;NNN*YkyQirt0hVNSvQ^(uI{ebvxvz0(WPhys. Rev. LettI{ Rir NShe200YO{ (WVQY͑f[/gO NY!kZP'YObJTbbJT _wVQY TLv^lsQl0<--Jm + 0nn  Blu1u3 &SN'Yf[irtf[bQZ`irtNPgeirt@b '$,  <xu3fQ"`# ,http:/events/icmp10s.xml,-, 0&D  S ~ġurkrk ԔԔ8c8c?p# QZ`irt-SN'Yf[[W, 'X ,  BuHa"`~ " hrTHzϑP[1cKmhVTHzQWP /f~YϑP[1cKmhVTTHzlkv^8O /fN{|͑vTHz\cKmhV0N_lOvk THzOwQ gf:_vO['`Tf[v&^[ yr+RTNkSfO /f NNNOb/gsQlv͑pKNN0,gbJT\bSTHzhVNirt0THzQCLvyraSW!jb0_(~gPgeu0hVN]z0hVNKmՋNSWNTHzQCLTTHzQWPveN Oo:yI{ebvxvzۏU\  ig  2  Z~#  Chair for Physics of Supramolecular Systems and Surfaces Bielefeld University, 33615 Bielefeld, Germany. E-Mail: ag@uni-bielefeld.de :  f (OH  0+nF ? 33___PPT10i.JPx+D=' = @B +r##1(6%4 / 0DArial 00TT0vܖ 0ܖ"D[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0<pPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#    0 6.0(  r  S MuZ#   u N  C &Aautumn6%4  ZXupp9? s 2010t^,{15g  '0$|  BHZu?Ay Te9g16efgV 15:00 16:40 0WpSN'Yf[irt'Y|i-N212Ye[ ++'-f3d V  Ngu?kk$  dFabrication and Imaging of 2D Nanomembranes and Graphene using Electron and Helium Ion Microscopes ee(4 +   <tu3fQ"`3#$}4 Photograph by Xiaodong Hu,  Hvu3s?"`\ c Prof. Armin Glzhuser0&0&<.   <dzu/31 FVT|N: O'YO Yec 5u݋62767809 bshen@pku.edu.cn~, g-g  gN   Blu1u3 &SN'Yf[irtf[bQZ`irtNPgeirt@b '$,  <xu3fQ"`# ,http:/events/icmp10s.xml,-, 0&D  S ~ġurkrk ԔԔ8c8c?p# QZ`irt-SN'Yf[[W, 'X ,   BuHa"`!!"1/ +  Abstract: Molecular nanotechnology deals with the fabrication, manipulation and application of functional objects with nanometer dimensions. To perform these tasks, it is essential not only to have tools for nanostructure fabrication, but also for advanced imaging to determine their shape, size and chemical composition. In the first part of the presentation, a scheme for the building of 2D nanomembranes is presented. It is based on specific electron-molecule interactions in surface bound self-assembled monolayers (SAMs). Electron exposure of aromatic SAMs leads to a dehydrogenation that is followed by a cross-linking between neighboring molecules into a 2D polymerized film [1]. The cross-linked SAM can be released from the surface, forming a self-supporting 2D nanomembrane with a thickness of only 1nm. Pyrolysis at ~1200K transforms nanomembranes into graphene [2]. The membranes can be further processed and used as nanosieves [3] or as supports for high resolution transmission electron microscopy [4]. More applications will be discussed. In the second part of the presentation, I shall report on a pioneering investigation of nanomembranes with the Helium Ion Microscope (HIM). Due to the short de Broglie wavelength of helium ions, the HIM has a higher resolution than scanning electron microscopes (SEM) and is capable to image features below 0.5 nm. Due to the complex interactions of helium ions with matter, HIM images are more surface sensitive than SEM images, and they show a pronounced chemical contrast. HIM images of nanomembranes and other small objects are presented and discussed. [1] A. Turchanin, D. Kfer, M. El-Desawy, Ch. Wll, G. Witte, A. Glzhuser: Molecular mechanisms of electron-induced cross-linking in aromatic SAMs, Langmuir 25, 7342 (2009). [2] A. Turchanin, A. Beyer, C. T. Nottbohm, X. Zhang, R. Stosch, A. Sologubenko, J. Mayer, P. Hinze, T. Weimann, A. Glzhuser: 1 nm thin carbon nanosheets with tunable conductivity and stiffness, Adv. Mater. 21, 1233 (2009). [3] M. Schnietz, A. Turchanin, C. T. Nottbohm, A. Beyer, H. H. Solak, P. Hinze, T. Weimann, A.Glzhuser: Chemically functionalized carbon nanosieves with 1 nm thickness, Small 23, 2651 (2009). [4] C. T. Nottbohm, A. Beyer, A. S. Sologubenko, I. Ennen, A. Htten, H. Rsner, W. Eck, J. Mayer, A. Glzhuser: Novel carbon nanosheets as support for ultrahigh-resolution structural analysis of nanoparticles; Ultramicroscopy 108, 885 (2008).j@ g$fHgfMgf f !   9  ;C 70 E    N  # 9   <   Z~#  Chair for Physics of Supramolecular Systems and Surfaces Bielefeld University, 33615 Bielefeld, Germany. E-Mail: ag@uni-bielefeld.de :  f (OH  0+nF ? 33___PPT10i.JPx+D='  = @B +rU#L1s#1(6%4 / 0DArial 00TT0vܖ 0ܖ"D[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0BpPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#    0 0(  r  S MuZ#   u N  C &AautumnP%4  ZXupp9? s 2010t^,{15g  '0$|  BHZu?Ay Te9g16efgV 15:00 16:40 0WpSN'Yf[irt'Y|i-N212Ye[ ++'-f3d V  Ngu?k>$  dFabrication and Imaging of 2D Nanomembranes and Graphene using Electron and Helium Ion Microscopes ee(4 +   <tu3fQ"`3#$}4 Photograph by Xiaodong Hu,  Hvu3s?"`\ c Prof. Armin Glzhuser0&0&<. |  <dzu/31 VT|N: O'YO Yec 5u݋ 62759474 yudp@pku.edu.cnH, g-gN   Blu1u3 &SN'Yf[irtf[bQZ`irtNPgeirt@b '$,  <xu3fQ"`# ,http:/events/icmp10s.xml,-, 0&D  S ~ġurkrk ԔԔ8c8c?p# QZ`irt-SN'Yf[[W, 'X ,   BuHa"`!!"1/ +  Abstract: Molecular nanotechnology deals with the fabrication, manipulation and application of functional objects with nanometer dimensions. To perform these tasks, it is essential not only to have tools for nanostructure fabrication, but also for advanced imaging to determine their shape, size and chemical composition. In the first part of the presentation, a scheme for the building of 2D nanomembranes is presented. It is based on specific electron-molecule interactions in surface bound self-assembled monolayers (SAMs). Electron exposure of aromatic SAMs leads to a dehydrogenation that is followed by a cross-linking between neighboring molecules into a 2D polymerized film [1]. The cross-linked SAM can be released from the surface, forming a self-supporting 2D nanomembrane with a thickness of only 1nm. Pyrolysis at ~1200K transforms nanomembranes into graphene [2]. The membranes can be further processed and used as nanosieves [3] or as supports for high resolution transmission electron microscopy [4]. More applications will be discussed. In the second part of the presentation, I shall report on a pioneering investigation of nanomembranes with the Helium Ion Microscope (HIM). Due to the short de Broglie wavelength of helium ions, the HIM has a higher resolution than scanning electron microscopes (SEM) and is capable to image features below 0.5 nm. Due to the complex interactions of helium ions with matter, HIM images are more surface sensitive than SEM images, and they show a pronounced chemical contrast. HIM images of nanomembranes and other small objects are presented and discussed. [1] A. Turchanin, D. Kfer, M. El-Desawy, Ch. Wll, G. Witte, A. Glzhuser: Molecular mechanisms of electron-induced cross-linking in aromatic SAMs, Langmuir 25, 7342 (2009). [2] A. Turchanin, A. Beyer, C. T. Nottbohm, X. Zhang, R. Stosch, A. Sologubenko, J. Mayer, P. Hinze, T. Weimann, A. Glzhuser: 1 nm thin carbon nanosheets with tunable conductivity and stiffness, Adv. Mater. 21, 1233 (2009). [3] M. Schnietz, A. Turchanin, C. T. Nottbohm, A. Beyer, H. H. Solak, P. Hinze, T. Weimann, A.Glzhuser: Chemically functionalized carbon nanosieves with 1 nm thickness, Small 23, 2651 (2009). [4] C. T. Nottbohm, A. Beyer, A. S. Sologubenko, I. Ennen, A. Htten, H. Rsner, W. Eck, J. Mayer, A. Glzhuser: Novel carbon nanosheets as support for ultrahigh-resolution structural analysis of nanoparticles; Ultramicroscopy 108, 885 (2008).j@ g$fHgfMgf f !   9  ;C 70 E    N  # 9   <   Z~#  Chair for Physics of Supramolecular Systems and Surfaces Bielefeld University, 33615 Bielefeld, Germany. E-Mail: ag@uni-bielefeld.de :  f (OH  0+nF ? 33___PPT10i.JPx+D='  = @B +r##1(6%4 / 0DArial 00TT0vܖ 0ܖ"D[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0B pPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#    0 0(  r  S MuZ#   u N  C &AautumnP%4  ZXupp9? s 2010t^,{15g  '0$|  BHZu?Ay Te9g16efgV 15:00 16:40 0WpSN'Yf[irt'Y|i-N212Ye[ ++'-f3d V  Ngu?k>$  dFabrication and Imaging of 2D Nanomembranes and Graphene using Electron and Helium Ion Microscopes ee(4 +   <tu3fQ"`3#$4 Photograph by Xiaodong Hu,  Hvu3s?"`\ c Prof. Armin Glzhuser0&0&<. |  <dzu/31 VT|N: O'YO Yec 5u݋ 62759474 yudp@pku.edu.cnH, g-gN   Blu1u3 &SN'Yf[irtf[bQZ`irtNPgeirt@b '$,  <xu3fQ"`# ,http:/events/icmp10s.xml,-, 0&D  S ~ġurkrk ԔԔ8c8c?p# QZ`irt-SN'Yf[[W, 'X ,   BuHa"`!!"1/ +  Abstract: Molecular nanotechnology deals with the fabrication, manipulation and application of functional objects with nanometer dimensions. To perform these tasks, it is essential not only to have tools for nanostructure fabrication, but also for advanced imaging to determine their shape, size and chemical composition. In the first part of the presentation, a scheme for the building of 2D nanomembranes is presented. It is based on specific electron-molecule interactions in surface bound self-assembled monolayers (SAMs). Electron exposure of aromatic SAMs leads to a dehydrogenation that is followed by a cross-linking between neighboring molecules into a 2D polymerized film [1]. The cross-linked SAM can be released from the surface, forming a self-supporting 2D nanomembrane with a thickness of only 1nm. Pyrolysis at ~1200K transforms nanomembranes into graphene [2]. The membranes can be further processed and used as nanosieves [3] or as supports for high resolution transmission electron microscopy [4]. More applications will be discussed. In the second part of the presentation, I shall report on a pioneering investigation of nanomembranes with the Helium Ion Microscope (HIM). Due to the short de Broglie wavelength of helium ions, the HIM has a higher resolution than scanning electron microscopes (SEM) and is capable to image features below 0.5 nm. Due to the complex interactions of helium ions with matter, HIM images are more surface sensitive than SEM images, and they show a pronounced chemical contrast. HIM images of nanomembranes and other small objects are presented and discussed. [1] A. Turchanin, D. Kfer, M. El-Desawy, Ch. Wll, G. Witte, A. Glzhuser: Molecular mechanisms of electron-induced cross-linking in aromatic SAMs, Langmuir 25, 7342 (2009). [2] A. Turchanin, A. Beyer, C. T. Nottbohm, X. Zhang, R. Stosch, A. Sologubenko, J. Mayer, P. Hinze, T. Weimann, A. Glzhuser: 1 nm thin carbon nanosheets with tunable conductivity and stiffness, Adv. Mater. 21, 1233 (2009). [3] M. Schnietz, A. Turchanin, C. T. Nottbohm, A. Beyer, H. H. Solak, P. Hinze, T. Weimann, A.Glzhuser: Chemically functionalized carbon nanosieves with 1 nm thickness, Small 23, 2651 (2009). [4] C. T. Nottbohm, A. Beyer, A. S. Sologubenko, I. Ennen, A. Htten, H. Rsner, W. Eck, J. Mayer, A. Glzhuser: Novel carbon nanosheets as support for ultrahigh-resolution structural analysis of nanoparticles; Ultramicroscopy 108, 885 (2008).j@ g$fHgfMgf f !   9  ;C 70 E    N  # 9   <   Z~#  Chair for Physics of Supramolecular Systems and Surfaces Bielefeld University, 33615 Bielefeld, Germany. E-Mail: ag@uni-bielefeld.de :  f (OH  0+nF ? 33___PPT10i.JPx+D=' = @B +r##1(6%4 / 0DArial 00TT0vܖ 0ܖ"D[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0BpPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#  r#1(6%4 / 0DArial 00TT0vܖ 0ܖD[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0BpPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#    0 0|(  r  S PuZ#   u N  C &AautumnP%4  Z@\upp9? 6 2010t^,{15g  '0$|  B]u?Ay Te9g16efgV 15:00 16:40 0WpSN'Yf[irt'Y|i-N212Ye[ ++'-f3d N  Nju?k>$  dFabrication and Imaging of 2D Nanomembranes and Graphene using Electron and Helium Ion Microscopes ee(, ,   <ou3fQ"`3#$4 Photograph by Xiaodong Hu,  H0zu3s?"`\ c Prof. Armin Glzhuser0&0&<, |  <u/31 VT|N: O'YO Yec 5u݋ 62759474 yudp@pku.edu.cnH, g-gN   B8u1u3 &SN'Yf[irtf[bQZ`irtNPgeirt@b '$,  <u3fQ"`# ,http:/events/icmp10s.xml,-, 0&D  S ~urkrk ԔԔ8c8c?p# QZ`irt-SN'Yf[[W, 'X ,   B$uHa"`!!"1/ #  Abstract: Molecular nanotechnology deals with the fabrication, manipulation and application of functional objects with nanometer dimensions. To perform these tasks, it is essential not only to have tools for nanostructure fabrication, but also for advanced imaging to determine their shape, size and chemical composition. In the first part of the presentation, a scheme for the building of 2D nanomembranes is presented. It is based on specific electron-molecule interactions in surface bound self-assembled monolayers (SAMs). Electron exposure of aromatic SAMs leads to a dehydrogenation that is followed by a cross-linking between neighboring molecules into a 2D polymerized film [1]. The cross-linked SAM can be released from the surface, forming a self-supporting 2D nanomembrane with a thickness of only 1nm. Pyrolysis at ~1200K transforms nanomembranes into graphene [2]. The membranes can be further processed and used as nanosieves [3] or as supports for high resolution transmission electron microscopy [4]. More applications will be discussed. In the second part of the presentation, I shall report on a pioneering investigation of nanomembranes with the Helium Ion Microscope (HIM). Due to the short de Broglie wavelength of helium ions, the HIM has a higher resolution than scanning electron microscopes (SEM) and is capable to image features below 0.5 nm. Due to the complex interactions of helium ions with matter, HIM images are more surface sensitive than SEM images, and they show a pronounced chemical contrast. HIM images of nanomembranes and other small objects are presented and discussed. [1] A. Turchanin, D. Kfer, M. El-Desawy, Ch. Wll, G. Witte, A. Glzhuser: Molecular mechanisms of electron-induced cross-linking in aromatic SAMs, Langmuir 25, 7342 (2009). [2] A. Turchanin, A. Beyer, C. T. Nottbohm, X. Zhang, R. Stosch, A. Sologubenko, J. Mayer, P. Hinze, T. Weimann, A. Glzhuser: 1 nm thin carbon nanosheets with tunable conductivity and stiffness, Adv. Mater. 21, 1233 (2009). [3] M. Schnietz, A. Turchanin, C. T. Nottbohm, A. Beyer, H. H. Solak, P. Hinze, T. Weimann, A.Glzhuser: Chemically functionalized carbon nanosieves with 1 nm thickness, Small 23, 2651 (2009). [4] C. T. Nottbohm, A. Beyer, A. S. Sologubenko, I. Ennen, A. Htten, H. Rsner, W. Eck, J. Mayer, A. Glzhuser: Novel carbon nanosheets as support for ultrahigh-resolution structural analysis of nanoparticles; Ultramicroscopy 108, 885 (2008).j@ g$fHgfMgf f !   9  ;C 70 E    N  # 9   <   Zu~#  Chair for Physics of Supramolecular Systems and Surfaces Bielefeld University, 33615 Bielefeld, Germany. E-Mail: ag@uni-bielefeld.de :  f (OH  0+nF ? 33___PPT10i.JPx+D='  = @B +r #3#1(6%4 / 0DArial 00TT0vܖ 0ܖD[SOal 00TT0vܖ 0ܖ DўSOal 00TT0vܖ 0ܖ0DfNal 00TT0vܖ 0ܖ1@DNSe~ў 00TT0vܖ 0ܖPD|^Wў 00TT0vܖ 0ܖ1 B-.  @n?" dd@  @@`` @'5& ,R$cl&oyɢwM 0AA fff333f@f3w ʚ;d7ʚ;g42d2d䂗 0BpPp<4dddd w 0T v <4!d!d x 0T80___PPT10 pp?  %X#  r04 4';#1Root EntrydO)`|jQ{@PicturesMCurrent User,SummaryInformation(\R      !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuv_7;delldellV՜.+,0    eԶpku[; Arial ϸԲ Ĭģ õƬ 1  õ