alex kuhn sem portfolio - esf · alex kuhn sem portfolio.pptx author: paul otteson created date:...

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SEM Por(olio Alex Kuhn 11 December 2014

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Page 1: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

SEM  Por(olio  

Alex  Kuhn  11  December  2014  

Page 2: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Part  I:  Technique  DemonstraAon  

1.  CriAcal  Point  Drying  2.  Depth  of  Field  3.  BackscaMer  4.  Low  Voltage  Image  of  an  Uncoated  Sample  5.  High  MagnificaAon  6.  Stereo  Pair  7.  Cryofracture  8.  AestheAc  

Page 3: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  1:  Micrograph  of  an  oyster  mushroom  gill  that  was  prepared  by  criAcal  point  drying.  OA  2,  SS  12,  WD  10mm,  AV  10  kV.  

Page 4: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  2:  DemonstraAon  of  depth  of  field  in  SEM.  OA  1,  SS  16,  WD  32  mm,  AV  5  kV.  

Page 5: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  3:  a)  Secondary  electron  micrograph  of  yarn  in  SEM.  b)  BackscaMer  electron  micrograph  of  (a).  OA  2,  SS  16,  WD  23  mm,  AV  5  kV  for  both  images.    

Page 6: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  4:  Uncoated  fingernail  in  SEM.  OA  1,  SS  8,  WD  33  mm,  AV  2  kV.  

Page 7: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z
Page 8: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z
Page 9: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z
Page 10: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  5:Toothbrush  bristle  in  SEM.  OA  1,  SS  8,  WD  11  mm,  AV  30  kV.    

Page 11: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  6:  Honey  bee  head  in  SEM.  OA  2,  SS  12,  WD  22  mm,  AV  10  kV.  

Page 12: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  7:  Oyster  mushroom  gill  in  SEM.  Sample  was  prepared  with  criAcal  point  drying  and  freeze-­‐fractured  using  liquid  nitrogen.  OA  1,  SS  14,  WD  31  mm,  AV  10  kV.  

Page 13: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  8:  Spore  aMached  to  yarn  viewed  in  SEM.  OA  1,  SS  12,  WD  29  mm,  AV  12  kV.    

Page 14: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Part  II:  PublicaAon  Micrographs  1.  Biological  Samples  

Using  Photoshop,  I  adjusted  images  of  a  pollen  grain  and  oyster  mushroom  gills  for  gamma,  contrast,  brightness,  and  unsharp  mask.      I  chose  to  take  micrographs  of  mushroom  gills  because  I  have  a  strong  interest  in  fungal  ecology.  I  like  the  image  of  the  pollen  grain  because  it’s  stuck  on  an  insect,  exemplifying  the  ubiquitous  nature  of  pollen.    The  insect  was  air  dried  and  spuMer  coated  with  Au-­‐Pd.  The  gills  were  fixed  with  glutaraldehyde  and  stained  with  osmium  tetroxide  before  also  being  spuMer  coated  with  Au-­‐Pd.  

Page 15: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  9:  Pollen  grain  on  an  insect  viewed  in  SEM.  OA  2,  SS  16,  WD  13  mm,  AV  12  kV.    

Page 16: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  10:  Freeze  fractured  mushroom  gill  viewed  in  SEM.  OA  1,  SS  14,  WD  31  mm,  AV  10  kV.    

Page 17: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  11:  Mycelium  of  an  oyster  mushroom  viewed  in  SEM.  OA  2,  SS  12,  WD  10  mm,  AV  10  kV.    

Page 18: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  12:  Hymenium  of  an  oyster  mushroom  viewed  in  SEM.  OA  1,  SS  16,  WD  32  mm,  AV  5  kV.    

Page 19: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Part  II:  PublicaAon  Micrographs  

2.  Non-­‐biological  Samples  

The  following  images  are  of  yarn  that  was  spuMer  coated  with  Au-­‐Pd.  I  chose  to  take  micrographs  of  yarn  because  of  my  interest  in  knidng.  On  a  macro-­‐scale,  yarn  is  so  organized  and  clean.  I  was  curious  to  see  if  this  changed  on  the  micro-­‐scale.  I  found  that,  in  some  ways,  it  did  change-­‐  things  got  more  chaoAc.  However,  in  some  ways,  it  remained  the  same-­‐  there  are  similar  paMerns  of  conAnuity  within  a  single  thread  as  there  are  in  a  knit  sweater.    

Page 20: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  13:  Yarn  and  spore  viewed  in  SEM.  OA  1,  SS  12,  WD  29  mm,  AV  12  kV.    

Page 21: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  14:  ParAcle  aMached  to  yarn  viewed  in  SEM.  OA  2,  SS  10,  WD  23  mm,  AV  5  kV.    

Page 22: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  15:  Cut  end  of  yarn  viewed  in  SEM.  OA  2,  SS  10,  WD  23  mm,  AV  5  kV.    

Page 23: Alex Kuhn SEM Portfolio - ESF · Alex Kuhn SEM Portfolio.pptx Author: Paul Otteson Created Date: 20150109163743Z

Figure  16:  Cut  ends  of  yarn  viewed  in  SEM.  OA  2,  SS  14,  WD  23  mm,  AV  5  kV.