Bonnell Group Announcements http://www.seas.upenn.edu/~bonnell/ Announcements for the Bonnell Group at the University of Pennsylvania mirabyte Feed Writer Tue, 24 Aug 2010 11:28:26 -0400 Hot Electrons Our observations that hot electrons can be extracted from surface plasmons and exploited in molecular electronic devices is out. This  work results from a great collaboration with Michael Therien’s group.  ACS Nano  7  2013]]> Wed, 15 May 2013 12:19:36 -0400 Probing Local Phenmoma http://rmp.aps.org/abstract/RMP/v84/i3/p1343_1 Our paper (coauthored by a host of famous colleagues) entitled 'Probing Local Phenmoma: from electrons to photons' is now published in Review of Modern Physics [ Rev. Mod. Phys. 84, 1343 (2012) ]]]> Fri, 02 Nov 2012 13:59:37 -0400 Scanning probes for new energy materials http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8637528 The special issue of Materials Research Bulletin came out late in the summer... note Stephen Nonnemann's figure of the cover as well as a couple of articles from the group.  MRS BULLETIN 37 DOI: 10.1557/mrs.2012.141 2012]]> Wed, 31 Oct 2012 09:17:12 -0400 NANO LETTERS: Transport Mechanisms http://pubs.acs.org/doi/abs/10.1021/nl300400a Our paper on transport mechanisms in nanoparticle/molecule hybrids came out in Nano Letters. It highlights differential analysis to get at complex mechanisms. NANO LETTERS 12 5 Pg 2414-2419 DOI: 10.1021/nl300400a 2012]]> Fri, 26 Oct 2012 10:18:19 -0400 Recent Student Visitors Our recent student visitors, Baptiste Rouxel (MINATEC), Bryan Valez (UPR) and Mathias Schroeder (TU Dresden) have returned to their various homes.   They all did great work and gave outstanding presentations. We hope to see them again soon. Wed, 24 Oct 2012 11:16:42 -0400 Stephen Nonnenmann @ 2012 MS&T Conference in Pittsburgh, PA MST13Stephen Nonnenmann presented his invited talk titled “Observation of Electrochemical Phenomena in Solid Oxide Fuel Cells Using In-Situ Scanning Probe Techniques within the Operating Regime” at the 2012 MS&T Conference in Pittsburgh, PA. He reviewed his latest developments in high temperature scanning probe microscopy for fuel cell applications.

Erie H. Morales was invited to present his work on BaTiO3 (001) surface at the conference Materials Science and Technology 2012. The session highlights the Sosman Award recipient Dawn Bonnell for her contribution to science.

]]> Wed, 10 Oct 2012 18:00:00 -0400 AFM workshop at Ibersensor 2012 Matt Brukman gave an SPM workshop in Puerto Rico which was a huge success.  Participants raved about his program (even though he didn't speak in Spanish!)]]> Fri, 16 Mar 2012 12:00:00 -0400 David Conklin - S. J. Stein Prize David Conklin  wins the S. J. Stein Prize for superior achievement in the field of new or unique materials or applications for materials in electronics.   Congratulations Dave!!]]> Thu, 29 Mar 2012 16:46:21 -0400 Moving On Dave ConklinDavid Conklin is now at IBM Fishkill and

Kendra KathanKendra Galipeau is now at Merck.

Congratulations to both!!

]]> Mon, 30 Jan 2012 18:42:36 -0400 Mathias Schroeder Mathias Schroeder from Lukas Eng’s group at Technical University in Dresden joins us to study ferroelectric surfaces.]]> Fri, 20 Jan 2012 12:00:00 -0400 Advanced Functional Materials Advanced Functional MaterialsOur recent paper on Advanced Functional Materials came out over the break.

Controlling Polarization Dependent Reactions to Fabricate Multi-Component Functional Nanostructures, D. Conklin, T-H Park, S. Nanayakkara, M. Therien, and D.A. Bonnell, Adv Func Mat 21 (2011) 4712–4718

]]> Tue, 10 Jan 2012 12:00:00 -0400 Talks at the MRS Meeting were a great success! Direct Probe of Protein/Electrode Interface Properties for Bio Circuit Design,   Galipeau, Xi, Discher, Bonnell

Observation of Electrochemical Phenomena in Solid Oxide Fuel Cells under Operating Conditions Using in situ SPM, Nonneman, Bonnell

Controlling Pattern Formation in Ferroelectric Nanolithography, Conklin, Nnnayakkara, Park, Therien, Bonnell

]]> Tue, 06 Dec 2011 12:00:00 -0400 Mathias Schroeder, Technical University in Dresden Conduction at domain walls in lithium niobate single crystals"]]> Fri, 02 Dec 2011 12:00:00 -0400 Dave Conklin / Advance Functional Materials Dave Conklin's paper on deposition mechanisms in Ferroelectric Nanolithography accepted for rapid publication in Advance Functional Materials... Look for it soon.]]> Mon, 17 Oct 2011 12:59:46 -0400 Nano/Bio Interface Center Symposium Don Eigler is the keynote speakerDon Eigler is the keynote speaker at the Frontiers of SPM in Energy Systems and Biotechnology... an NBIC  symposium on October 26/27, 2011  [ click here for details ]

]]> Wed, 05 Oct 2011 16:33:07 -0400 Congratulations Dave! Dave Conklin successfully defends his PhD Thesis. Congratulations Dave!!! ]]> Wed, 24 Aug 2011 12:02:05 -0400 ACS Nano June 2011 Kendra Galipeau-Kathan and Sanjinin Nanayakkara publish in ACS Nano June 2011Kendra Galipeau-Kathan and Sanjinin Nanayakkara publish in ACS Nano June 2011. See the paper on local polarization of porphyrin on graphite electrodes with coauthors Discher, P. O'Brien and Nikiforov.]]> Wed, 15 Jun 2011 16:29:11 -0400 Commencement Ceremonies May 2011 Kendra Galipeau-Kathan Xi ChenKendra Galipeau-Kathan celebrates her PhD and Xi Chen takes his Masters Degree in the Commencement Ceremonies! May 2011]]> Fri, 06 May 2011 16:23:10 -0400 Omicron STM A new Omicron STM is installed and running.  Watch for results on molecular interactions to come rolling out soon! Thu, 31 Mar 2011 14:38:09 -0400 Nanotechnology Research Directions for Societal Needs in 2020 Dawn BonnellBonnell  is a coauthor of the Nanotechnology Research Directions for Societal Needs in 2020 Report that  is now available on line and is published by Springer.  This is a comprehensive review of the nanotechnology initiative with predictions for impact in the next decade.  http://www.springer.com/materials/nanotechnology/book/978-94-007-1167-9

]]> Thu, 24 Mar 2011 08:00:05 -0400 NBIC Research Excellence Award Dave Conklin was a finalist for the NBIC Research Excellence Award. Congratulations!!! ]]> Thu, 17 Mar 2011 12:02:05 -0400 EDA Tech Forum, March 2011 issue Bonnell quoted in the EDA Tech Forum along with Mike Roco and Chad Mirkin on the Nano2 national strategic plans. ]]> Thu, 03 Mar 2011 17:50:07 -0400 Groundbreaking for $80 million Nanotechnology Center GroundbreakingGroundbreaking ceremony for the Krishna Singh Nanotechnology Center took place on February 17, 2011.   Look back for updates on this exciting project. [ read the Penn Current article ]

]]> Thu, 17 Feb 2011 17:43:27 -0400 Kendra Kathan-Galipeau published in ACS Nano Kendra's paper with our colleagues from Penn State and Cornell is published in ACS Nano. See her pico meter probe of ferroelectric strain and determination of internal electric fields here.

Kendra Kathan-Galipeau, Pingping Wu, Yulan Li, Long-Qing Chen, Arsen Soukiassian, Xiaoxing Xi, Darrell G. Schlom, and Dawn A. Bonnell, Quantification of Internal Electric Fields and Local Polarization in Ferroelectric Superlattices, ACS Nano, December 16 2010.

]]> Mon, 10 Jan 2011 10:11:05 -0400 Kendra Kathan-Galipeau Successfully Defends Her Thesis. Congratulations!!!]]> Mon, 03 Jan 2011 09:53:50 -0400 Laura Kraya Presents at AVS / Surface Science Division Laura Kraya's recent results on molecular adsorption on barium titanate surfaces was also presented at AVS in the Surface Science Division.  These are the first observations of  local electronic structure of surface reconstructions on BTO and of the effect of polarization and adsorption on electronic structure.]]> Tue, 02 Nov 2010 15:55:09 -0400 Dave Conklin Presents at AVS Dave Conklin also gave a great presentation on the effect of nanoparticle size, molecular length, temperature and wavelength on optoelectronic properties of hybrid arrays.  The mechanism of plasmon induced photo current were elaborated.also gave a great presentation on the effect of nanoparticle size, molecular length, temperature and wavelength on optoelectronic properties of hybrid arrays.  The mechanism of plasmon induced photo current were elaborated.]]> Fri, 29 Oct 2010 11:56:28 -0400 Kendra Kathan Talk at AVS Kendra Kathan gave a brilliant talk at AVS  in Albuquerque in which she described her recent results on dielectric function of single molecular peptide layers.  She determined the change in polarization  volume on optical absorption in a Zn cofactor using a new SPM technique:  Torsionally Stabilized Nano Impedance Spectroscopy.]]> Thu, 28 Oct 2010 17:00:26 -0400 Dave Conklin, AVS Graduate Student Award Finalist Dave Conklin is a finalist Nanoscale Science and Technology Graduate Student Award from AVS for his work on Plasmon Induced Electronic Transport in collaboration with all of the coauthors on the recent Nano Letters paper.  He presented a special talk to the NSTD Committee in Albuquerque.  Congratulations Dave!!!!! ]]> Thu, 21 Oct 2010 18:09:11 -0400 Stephen Nonneman Joins the Bonnell Group We are pleased to welcome Stephen Nonneman as a post doc in the Bonnell Group. Stephen brings expertise in ambient SPM and ferroelectric nanostructures. Look for his future research on in situ behavior in energy related devices. Fri, 24 Sep 2010 14:25:43 -0400 Ramsey Kraya’s paper in NANO LETTERS Ramsey Krayas paper in NANO LETTERSRamsey Kraya’s  paper on size dependent metal/semiconductor interfaces was published in Nano Letters.    Surface energy was used as a driving force to fabricate interfaces with different orientations and the properties were quantified.    Orientation Controlled Schottky Barrier Formation at Au-SrTiO3Interfaces   R. Kraya et al  NANO LETTERS  Volume: 10  Issue: 4   Pages: 1224-1228  ]]> Fri, 10 Sep 2010 14:45:43 -0400 Erie Morales Joins the Bonnell Group Last month we welcomed Erie Morales in the Bonnell group. He comes from the group of Ulrike Diebold and has exciting accomplishments on atomistic processes on oxide surfaces. Check back to see his new research as it progresses.]]> Fri, 03 Sep 2010 11:12:28 -0400 Sanjini Nanayakara goes to the National Renewable Energy Lab Sanjini Nanayakara has taken a position at the National Renewable Energy Lab outside of Denver Colorado. http://www.nrel.gov     She will be working on nanoparticles for photovoltaic devices.  Look for her future work contributing solutions for green energy.]]> Tue, 24 Aug 2010 13:36:10 -0400 Arjun Shah and Mike Shen take 3rd place Seniors Arjun Shah and Mike Shen take 3rd place in the Materials Science and Engineering's senior design competition for their study of in situ measurement of photo conductivity in organic devices.]]> Mon, 03 May 2010 17:29:33 -0400 Plasmon Induced Electrical Conduction in Molecular Devices http://www.avs.org/news.popup.aspx?article=295  Plasmonics is a new field in which surface plasmons are exploited to manipulate and control light.  Here we show that surface plasmons can be configured to induce electronic transport in molecular devices and in this manner convert optical energy into electrical conduction. ]]> Parag Banerjee, David Conklin, Sanjini Nanayakkara, Tae-Hong Park, Michael J. Therien, and Dawn A. Bonnell Wed, 28 Apr 2010 17:17:58 -0400 Discovery of Plasmon Induced Current Plasmon Discovery Discovery Channel, Popular Mechanics, Popular Science and up to 15 sites and blogs reported on our recent ACS Nano paper on plasmon induced current in molecular devices. ]]> Fri, 12 Feb 2010 21:35:46 -0400 Optical Energy Converted to Electrical Current by Plasmons in Metal/Molecule Nanostructures http://www.seas.upenn.edu/~bonnell/pubs/ Optical Energy Converted to Electrical Current by Plasmons in Metal/Molecule Nanostructures

Plasmon induced current is a nanostructure consisting of Ag nanoparticles linked with  porphyrins is demonstrated.  Banerjee et al   ACS Nano  Feb 2009

]]> Mon, 18 Jan 2010 18:56:49 -0400 Bonnell group holiday get together http://www.seas.upenn.edu/~bonnell/events/images/PICT0056_2010.01.01.jpg Holiday Party, January 2010Bonnell group holiday get together

]]> Fri, 01 Jan 2010 22:00:32 -0400 Laura Kraya passes her proposal defense http://www.seas.upenn.edu/~bonnell/people/ Laura Kraya passes her proposal defense.  Congratulations! ]]> Fri, 11 Dec 2009 22:00:22 -0400 Dielectric Function of Single Molecular Layer Probed http://www.seas.upenn.edu/~bonnell/pubs/ Dielectric Function of Single Molecular Layer Probed

Maxim Nikiforov with our collaborators from Dresden Technical University and Duke University determine the dielectric function of a single monolayer

Journal Of Applied Physics : 106 Article Number: 114307  Dec 2009

]]> Tue, 01 Dec 2009 18:53:45 -0400 Special Issue of the MRS Bulletin Focuses on Electromechanics at the Nanoscale http://www.seas.upenn.edu/~bonnell/pubs/ Special Issue of the MRS Bulletin Focuses on  Electromechanics at the Nanoscale

See Bonnell et al.  Piezoresponse Force Microscopy: A Window into Electromechanical Behavior at the Nanoscale  MRS BULLETIN : 34 Issue: 9  : 648-657 : SEP 2009 ]]> Tue, 15 Sep 2009 18:52:51 -0400 Ferroelectric Polarization Effects Adsorption http://www.seas.upenn.edu/~bonnell/pubs/ Ferroelectric Polarization Effects Adsorption

John Garra’s  results proving that ferroelectric polarization affect the adsorption of water and methanol are published.  Surface Science: 603: 1106-1114 : Apr 15 2009 

]]> Wed, 15 Apr 2009 18:52:30 -0400