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Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

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Page 1: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

   

Page 2: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

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Page 3: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

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Conrad  Becker  Professor    Aix-­‐Marseille  Université  CINaM  –  UMR  7325  Campus  de  Luminy  –  case  913  13288  Marseille  cedex  09,  France    conrad.becker@univ-­‐amu.fr    Research  interests  Template-­‐controlled  growth  of  nanomaterials  Thin  organic  films  Nanocatalysis        Presentation  title  Surfaces  as  2D  templates    Abstract  The  bottom-­‐up  fabrication  of  ordered  nanostructures  is  a  technological  challenge,  which  is  fundamental  for  the  fabrication  of  nanoscale  materials.  This  approach  requires  a  profound  knowledge  of  the  mechanisms,  which  govern  self-­‐organization  of  matter  at  the  nanometer  scale.  Three  distinct  examples  will  be  discussed,  which  are  based  on  different  interaction  mechanisms.  A  common  point  will  however  be  the  influence  of  the  substrate  on  the  growth  via  a  template  effect  [1].  The  first  example  concerns  the  template-­‐controlled  growth  of  metal  nanoparticles  on  thin  nanostructured  alumina  films.  The  second  example  treats  the  growth  of  highly-­‐ordered  films  of  n-­‐heteroacenes  on  Au(111),  which  is  mediated  by  hydrogen  bonding.  Finally  the  growth  of  a  functionalized  bipyrene  on  Au(111)  is  presented,  which  results  in  an  ordered  layer  that  is  stabilized  by  Van  der  Waals  interactions.    [1]  C.  Becker,  K.  Wandelt,  Surfaces:  Two-­‐dimensional  Templates,  Top.  Curr.  Chem.  287,  45-­‐86  (2009),  DOI:  10.1007/128_2008_151      

Page 4: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  4  

Suzanne  Giorgio  Professor    Aix-­‐Marseille  Université  CINaM  –  UMR  7325  Campus  de  Luminy  –  case  913  13288  Marseille  cedex  09    suzanne.giorgio@univ-­‐amu.fr    Research  interests  Metal  nanoparticles  and  nanoalloys  In  situ  transmission  electron  microscopy          Presentation  title  Nanomaterials:  shape,  structure,  organization,  and  reactivity  by  TEM      Abstract  Metal  nanoparticles  (NPs)  and  nanoalloys  are  interesting  for  many  applications  in  physics,  chemistry,  biology   and   nanomedicine.   Among   all   the   preparation   techniques,   the  most   recent   techniques   by  soft   chemistry   allow   to   synthetize   NPs   with   homogeneous   composition   and   size,   and   perfectly  organize  them  when  they  are  deposited  on  flat  substrates.  TEM  is  the  ideal  tool  to  characterize  the  size,  morphology,  structure,  composition,  organization  and  structure   at   the   interface  with   the   substrate.  On   the  other  hand,   it   does  not   give   any   information  about  the  surface  reconstruction,  which  is  better  seen  by  STM.  An  important  property  of  NPs  is  their  reactivity  in  different  gas  phase  reactions.  Therefore,  they  are  often  used  as  catalysts.  The  reactivity  in  gas,  related  to  morphological  changes  or  surface  segregation  can  be  studied  in  situ  by  environmental  microscopy.    The  in  situ  growth  of  nanoalloys   in   liquid  can  also  be  directly  observed  during  the  reduction  by  the  electron  beam.    Standard  and  new  techniques  of  transmission  electron  microscopy  are  presented  with  examples.  In  situ  observations  in  TEM  are  compared  to  other  in  situ  techniques  as  XPS,  GISAXS  …      

   

Page 5: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  5  

Ueli  Heiz  Professor  Academic  Director  of  the  Catalysis  Research  Center    Technische  Universität  München  Chair  of  Physical  Chemistry  Lichtenbergstraße  4  85747  Garching,  Germany    [email protected]    Research  interests  Cluster  Chemistry,  Cluster  Physics  Catalysis,  Photocatalysis        Presentation  title  Clusters  in  Action    Abstract  The  study  of  size-­‐selected  clusters  on  surfaces  has  been  growing  into  a  vital  research  field  within  cluster  science  and  catalysis  since  the  discovery  of  the  astonishing  size-­‐dependent  activity  of  small  gold  clusters  for  the  oxidation  of  CO  in  the  late  nineties.  More  than  one  decade  of  research  in  a  combined  effort  between  theory  and  experiment  has  resulted  in  a  detailed  understanding  of  cluster’s  structural,  electronic,  optical,  and  magnetic  properties.  Furthermore,  several  chemical,  catalytic,  and  photocatalytic  processes  on  clusters  are  understood  on  a  molecular  level,  today.  This  exciting  advancement  was  only  possible  by  a  parallel  development  and  introduction  of  novel,  state-­‐of-­‐the-­‐art  methods,  both  in  experiment  and  theory.  In  this  talk  recent  examples  of  this  research  field  are  presented.      

Page 6: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  6  

Corinna  R.  Hess  Professor    Technische  Universität  München  Fachgebiet  Bioanorganische  Chemie  Lichtenbergstr.  4  85747  Garching    [email protected]      Research  interests  coordination  chemistry  spectroscopy    catalysis          Presentation  title  Multi-­‐cofactored  Catalysts  for  Small  Molecule  Chemistry    Abstract  Research  in  our  group  is  focused  on  the  development  of  bio-­‐inspired  inorganic  compounds  as  catalysts  for  small  molecule  chemistry,  relevant  for  renewable  energy  and  sustainable  chemistry.  Adopting  a  strategy  from  nature,  we  have  generated  a  series  of  ‘multi-­‐cofactored’  compounds  for  reactions  that  include  H2production  and  O2  activation.  Results  of  studies  pertaining  to  the  redox  properties,  electronic  structures  and  reactivity  of  this  group  of  compounds  will  be  presented.      

Page 7: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  7  

Thomas  Michely  Professor    II.  Physikalisches  Institut    Universität  zu  Köln  Zülpicher  Str.  77  50937  Köln,  Germany      [email protected]­‐koeln.de          Presentation  title  The  backside  of  graphene  –  functionalization  and  new  hybrid  materials      Abstract  The  ease  by  which  the  properties  of  graphene  are  affected  through  contact  with  other  materials  is  one  of  its  unique  features  and  defines  an  integral  part  of  its  potential  for  applications.  Through  a  combination  of  microscopy,  spectroscopy  and  ab  initio  calculations  it  is  found,  that  the  substrate  of  epitaxial  graphene  itself  as  well  as  intercalation  layers,  created  by  the  insertion  of  atoms  under  its  backside,  are  efficient  tools  to  change  the  electronic  properties  and  the  interaction  of  graphene  with  the  environment  on  its  frontside.  This  enables  us  not  only  to  functionalize  graphene  as  a  template  for  patterned  adsorption  of  atoms  and  molecules,  but  also  to  change  the  strength  in  ionic,  van  der  Waals,  and  chemical  binding  of  adsorbates  to  graphene.  New  reaction  pathways  can  be  observed,  when  the  reactants  are  supplied  by  intercalation  into  the  confined  space  in  between  graphene  and  its  substrate.  As  an  example,  the  formation  of  a  new  super-­‐dense  hydroxyl/water  phase  under  Gr  on  Ir(111)  is  demonstrated.  With  the  rise  of  graphene,  defect  engineering  in  2D-­‐layer  systems  has  become  an  emerging  subject.  We  show  here  that  for  supported  graphene,  the  substrate  on  its  backside  gives  rise  to  new  phenomena  in  defect  creation  and  annealing.  Interface  channeling,  vacancy  cluster  antidot  lattice  formation,  and  gas  aggregation  through  ion  irradiation  of  graphene  will  be  addressed.          

Page 8: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  8  

Harald  Oberhofer  Postdoctoral  Fellow    Technische  Universität  München  Theoretische  Chemie  Lichtenbergstr.  4  85747  Garching,  Germany    [email protected]    Research  interest  Energy  Materials  Theoretical  Method  development  (Photo-­‐)electrocatalysis          Presentation  title:  First-­‐Principles  Based  Multiscale  Modelling  in  Materials,  Energy  and  Catalysis          Abstract  In  recent  years,  the  contribution  quantitative  theoretical  approaches  can  make  in  energy  science  and  catalysis  has  become  more  and  more  apparent.  Be  it  fundamental  energy  research,  screening  of  new  catalytic  materials,  or    optimizing  the  efficiency  of  whole  chemical  reactors,  each  of  these  highly    successful  fields  of  theoretical  research  requires  a  whole  set  of  methods    ranging  from  the  scale  ofsingle  atoms  and  electrons  up  to  a  full  device    or  reactor.  In  my  talk  I  will  demonstrate  such  multi-­‐scale  approaches  on  two  examples  of  current  energy  research.  First,  I  will  describe  the  use  of  thermodynamic  approaches  for  the  discovery  of  optimal  photo-­‐electro-­‐catalysts  for  sustainable  hydrogen  production.  As  a  second    example  I  will  consider  DFT  based  screening  techniques  to  minimize  energy    losses  in  organic  photovoltaic  cells,  focusing  especially  on  efficient    charge  transport  through  the  cell.      

Page 9: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  9  

Lionel  Santinacci  Chargé  de  recherche    Aix-­‐Marseille  Université  CINaM  –  UMR  7325  Campus  de  Luminy  –  case  913  13288  Marseille  cedex  09,  France    lionel.santinacci@univ-­‐amu.fr    Research  interests  Lionel  Santinacci  works  on  electrochemically  grown  one-­‐dimensional  nanostructures  such  as  TiO2  nanotubes  and  nanoporous  Al2O3  membranes.  These  nanostructures  are  then  functionalized  by  electrochemical  deposition  or  by  Atomic  Layer  Deposition  (ALD)  for  energy  production  and  storage  electrocatalysis,  photocatalysis,  photovoltaics,  batteries,  Capacitors).      Presentation  title  Functional  one-­‐dimensional  nanostructures  :  combination  of  anodic  oxidation  with  atomic  layer  deposition    Abstract  Anodic  oxidation  has  been  used  for  a  longtime  as  a  way  to  passivate  metallic  electrodes  to  prevent  corrosion.  It  is  the  discovery  of  self-­‐ordered  nanoporous  alumina  membranes  reported  in  1995  that  has  revealed  its  potential  use  for  surface  nanostructuring.  Later,  the  anodic  growth  of  TiO2  nanotubes  (TiO2-­‐nt)  has  considerably  widened  the  field  of  applications  of  such  approach  since  TiO2  exhibits  many  valuable  properties.  It  is  now  possible  to  use  other  metals  or  alloys  to  grow  porous  or  tubular  oxidized  nanostructures.  However  to  further  improve  the  properties  of  such  electrodes,  it  is  necessary  to  functionalize  their  surface  with  other  materials  of  interest.  Among  the  various  thin  film  deposition  methods,  Electrochemical  Deposition  (ED)  and  Atomic  Layer  Deposition  (ALD)  have  shown  a  great  ability  to  conformally  coat  porous  structures  exhibiting  a  high  aspect  ratio.  The  main  advantages  of  ALD  over  ED  is  that  it  can  be  carried  out  onto  non-­‐conductive  materials,  it  allows  an  accurate  control  of  the  thickness  and  it  is  usually  more  direct  to  grow  oxides  or  nitrides.  We  present,  here,  three  examples  of  nanostructured  electrodes  fabricated  using  anodic  oxidation  of  Al  and  Ti  in  combination  with  ALD  of  active  materials.  The  targeted  applications  are  in  the  fields  of  electrocatalysis,  Li-­‐ion  microbatteries  and  photoelectrochemical  water  splitting.      

Page 10: Book of abstracts - Faculté des Sciences · Cluster"Chemistry,Cluster"Physics" ... patternedadsorptionof"atoms"andmolecules,"but"alsotochange"the"strengthinionic,"vander" ... Book

  10  

Dr.  Florian  F.  Schweinberger  Staff  Scientist/Scientific  Coordinator    Technische  Universität  München  Catalysis  Research  Center  Lichtenbergstraße  4  85747  Garching,  Germany    [email protected]    Research  interests  Heterogeneous  model  catalysis/Cluster  science  Reactivity  and  selectivity  of  cluster  catalysts  under  UHV  and  applied  ambient  conditions          Presentation  title  Introduction  into  m2gsn      Abstract  The  talk  will  give  a  short  overview  on  the  ‘munich  marseille  graduate  school  of  nano  science’  (m2gsn)  program.  Beside  the  technical  details,  in  particular  of  the  master  program,  also  the  challenges  and  opportunities  that  a  bilingual  program  offers  for  all  participants,  from  students,  administration,  teachers  and  future  employers  will  be  stressed.      

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Jean-­‐Marc  Themlin  Professor    Aix-­‐Marseille  Université  IM2NP  –  UMR  7334  Avenue  Escadrille  Normandie  Niemen  -­‐  Case  142  13397  Marseille  Cedex  20,  France    jean-­‐marc.themlin@univ-­‐amu.fr    Research  interests  Electronic  structure  of  surfaces,  inverse  photoemission,  graphene  and  graphene-­‐like  materials,  silicon  carbide  surfaces            Presentation  title  Electronic  properties  of  2D  systems      Abstract  Linked  to  the  versatility  of  the  Si-­‐C  bond,  the  Si-­‐termination  of  hexagonal  silicon  carbide  offers  a  fantastic  playground  to  tailor  two-­‐dimensional  C-­‐based  nano-­‐materials  with  contrasted  electronic  properties.  We  present  a  selection  of  some  recent  experimental  results  aimed  at  characterizing  and  manipulating  these  C-­‐based  2D  nano-­‐materials  on  top  of  6H-­‐SiC(0001),  primarily  using  hydrogenation  or  H-­‐intercalation  [1]  at  various  substrate  temperatures.  The  electronic  structure  of  the  (6√3x6√3)R30°  reconstruction  of  6H-­‐SiC(0001),  the  so-­‐called  buffer-­‐layer  graphene  (BLG)  is  first  investigated  using  LEED,  AES,  and  Angle-­‐Resolved  Inverse  Photoemission  Spectroscopy  (ARIPES).  In  particular,  we  focus  on  the  recently  disputed  existence  of  a  significant  fraction  of  remaining  dangling  bonds  (DB)  under  the  BLG,  associated  with  unsaturated  Si  atoms  of  the  first  C-­‐Si  bilayer.  In  inverse  photoemission  spectra,  these  DB  give  rise  to  a  peak  around  1  eV  above  the  Fermi  level,  associated  with  the  upper  single-­‐electron  states  of  a  Mott-­‐Hubbard  insulator,  which  vanishes  upon  hydrogenation  and/or  H-­‐intercalation.    A  room  temperature  exposition  to  activated  hydrogen  atoms  already  quenches  the  DB-­‐derived  peak  and  causes  an  upward  band  bending  of  the  SiC  substrate.  This  is  puzzling  since  it  is  known  that  the  H  atoms  do  not  reach  the  Si  atoms  underneath  the  BLG  but  remain  covalently  bound  on  top  of  the  BLG.  This  indirect  passivation  of  the  DB  is  attributed  to  the  formation  of  additional  Si-­‐C  bonds,  which  also  cause  an  increased  n-­‐type  doping  of  the  H-­‐BLG.  With  a  graphane-­‐like  electronic  structure,  the  latter  is  an  insulator  with  a  large  bandgap.    A  high-­‐temperature  hydrogenation  (substrate  held  at  T>700°C  )  transforms  the  BLG  into  a  quasi  free-­‐standing  graphene  monolayer  (QFSG)  on  a  hydrogenated  SiC  bilayer  which  is  close  to  a  H-­‐(√3x√3)R30°-­‐SiC  reconstruction.  In  this  case,  the  remaining  DB  are  directly  passivated  by  the  H  atoms  which  are  able  to  diffuse  through  the  BLG.  H  atoms  are  also  able  to  substitute  C  in  anchoring  Si-­‐CBLG  bonds,  leading  to  an  undoped  QFSG  layer  separated  from  the  SiC  substrate  by  H-­‐intercalation.                [1]  Y.-­‐P.  Lin,  Y.  Ksari,  and  J.-­‐M.  Themlin,  Hydrogenation  of  the  buffer-­‐layer  graphene  on  6H-­‐SiC(0001)  :  A  possible  route  for  the  engineering  of  graphene-­‐based  devices  Nano  Research  8  (3),  839  (2015),  DOI  10.1007/s12274-­‐014-­‐0566-­‐0      

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Olivier  Thomas  Professor    Aix-­‐Marseille  Université  IM2NP  –  UMR  7334  Avenue  Escadrille  Normandie  Niemen  -­‐  Case  142  13397  Marseille  Cedex  20,  France    olivier.thomas@univ-­‐amu.fr    Research  interests  Mechanical  properties  in  small  dimensions  (elasticity,  plasticity),  X-­‐ray  scattering  –  synchrotron  radiation          Presentation  title  Mechanical  properties  of  nanostructures      Abstract  Mechanical  properties  of  materials  (elastic  modulus,  yield  stress,  fracture  strength)  are  highly  dependent  on  the  sample  size.  Recent  studies  have  highly  benefited  from  in  situ  X-­‐ray  diffraction  experiments  during  mechanical  tests  performed  on  small  objects.  For  example  micro-­‐Laue  experiments  performed  on  synchrotron  beamlines  has  been  very  useful  to  study  the  first  stages  of  plastic  deformation  in  micron-­‐sized  fcc  metal  pillars.  More  recently  Coherent  X-­‐ray  Diffraction  (CXD)  has  been  shown  to  be  a  powerful  tool  to  map  elastic  strains  in  nanostructures  as  well  as  very  sensitive  to  phase  shifting  defects  such  as  dislocations.  This  presentation  will  focus  on  the  interesting  opportunities  offered  by  the  combination  of  nanobeam  X-­‐ray  diffraction  and  AFM  mechanical  testing  for  investigating  the  mechanical  properties  of  nano-­‐objects.    This  work  is  funded  by  ANR  under  project  MECANIX  ANR-­‐11-­‐BS10-­‐01401      

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Klaus  Wandelt  Professor  emeritus    Institute  of  Physical  and  Theoretical  Chemistry,  University  of  Bonn,  Germany    Institute  of  Experimental  Physics,  University  of  Wroclav,  Polen    Department  of  Physics,  University  of  Rome  Tor  Vergata,  Italy    k.wandelt@uni-­‐bonn.de          Presentation  title  Electrochemical  Surface  Science      Abstract  Processes  at  solid/liquid  interfaces  are  playing  an  increasing  role  in  modern  technologies  like  energy  conversion  and  storage  (fuel  cells,  batteries),  material  science  (thin  film  devices),  nanotechnology  (e.g.  "Damascene  process"),  medicine  (biocompatibility),  etc.  Fundamental  investigations  of  these  "buried"  interfaces  -­‐  compared  to  surfaces  in  ultrahigh  vacuum  -­‐  are,  however,  impeded  by  the  restriction  to  photon-­‐  and  probe  based  experimental  techniques  only.  Based  on  a  combination  of  in  situ  (cyclic  voltammetry,  scanning  tunneling  microscopy,  IR-­‐and  UV  spectroscopy,  X-­‐ray  diffraction)  as  well  as  ex  situ  methods  (low  energy  electron  diffraction,  synchrotron  X-­‐ray-­‐  and  Auger  electron  spectroscopy,  ion  scattering)  properties  and  processes  at  metal  singly  crystal  electrode  surfaces,  in  particular  Cu(111),  Cu(100)  and  Cu(110),  in  electrolytic  solutions  have  been  investigated  and  will  be  discussed  in  this  presentation.  Using  selected  examples,  like  the  specific  adsorption  of  anions  (chloride,  bromide,  iodide,  sulfide,  sulfate),  the  2D  phase  formation  due  to  electrochemical  deposition  (deposition  of  copper  on  Au(111))  and  surface  compound  formation  (Cu-­‐iodide),  and  the  self-­‐assembly  of  organic  molecules  (viologens,  porphyrins),  the  state-­‐of-­‐the-­‐art  of  "electrochemical  surface  science"  will  be  delineated.            

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Veronika  Zinth  Postdoctoral  researcher    MLZ  (Heinz  Maier-­‐Leibnitz  Zentrum)  Technische  Universität  München  Lichtenbergstraße  4  85747  Garching,  Germany    [email protected]    Research  interests  Neutron  methods  in  material  research  Li-­‐ion  batteries  Diffraction    Presentation  title  Neutron  methods  in  battery  research    Abstract  A  broad  range  of  neutron  techniques  that  can  be  used  for  nano  and  material  research  is  available  at  MLZ  (Heinz  Maier-­‐Leibnitz  Zentrum).  Examples  are  small  angle  neutron  scattering,  neutron  reflectometry  and  neutron  diffraction.  Neutron  diffraction  allows  in  situ  investigation  of  Li  plating,  the  -­‐  unwanted  -­‐  deposition  of  metallic  lithium  on  the  graphite  anode  of  a  Li-­‐ion  battery  during  fast  charge  or  charge  at  low  temperatures.  It  can  be  shown  that  at  -­‐20°C,  Li  comprises  about  19%  of  cell  capacity  and  is  mostly  reversible.  In  the  future,  a  better  understanding  of  Li  plating  could  help  to  develop  charging  protocols  for  Li-­‐ion  batteries  that  avoid  it.    

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 Campus  Luminy                                                        Transportation  From  Luminy  to  Marseille  center    

Bus  21  (Métro  Castellane)  or  JET  (Métro  Rond  Point  du  Prado)  every  7  min.  until  21:15  h     Then  M1  to  the  Vieux  Port    

 From  Marseille  Vieux  Port  to  Luminy     Métro  1  to  Castellane  then     Bus  21  (Luminy)  every  7-­‐10  min.  until  21:20  h  

Bus  521  (Luminy)  21:31,  22:06,  22:31,  22:56,  23:31,  23:51,  00:16,  00:51       The  521  may  depart  a  couple  of  minutes  earlier  then  indicated.    Bus  521  (Luminy)  from  Vieux  Port  21:25,  22:01,  22:25,  22:50,  23:25,  23:45,  00:10,  00:45     The  521  may  depart  a  couple  of  minutes  earlier  then  indicated.    

Tickets  on  the  bus:  1€80  with  1h  validity.      

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Campus  St.  Jérôme    

   Transportation  From  Marseille  Place  Castellane    

M1  (La  Rose)  To  Frais  Vallon     Then  Bus  B3A  (ST  JEROME  PARKING  RELAIS)  to  Saint  Jérôme  Faculté  

     

Bibliothèque Universitaire

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