Publications by Year

 

2019

Correlated spatially resolved two-dimensional electronic and linear absorption spectroscopy

Megan A. Steves, Hongjun Zheng, and Kenneth L. Knappenberger, Jr.Opt. Lett., 44,2117-2120 (2019).

Superatom spin-state dynamics of structurally precise metal monolayer-protected clusters (MPCs)

Lenzi J. Williams, Patrick J. Herbert, Marcus A. Tofanelli, Christopher J. Ackerson, and Kenneth L. Knappenberger, Jr.J. Chem. Phys., 150,doi: 10.1063/1.5090508 (2019).

Low-Temperature Magnetism in Nanoscale Gold Revealed through Variable-Temperature Magnetic Circular Dichroism Spectroscopy

Patrick J. Herbert, Phillip Window, Christopher J. Ackerson , and Kenneth L. Knappenberger, Jr.J. Phys. Chem. L, 10,189-193 (2019).

2018

Quantification of Interface-dependent Plasmon Quality Factors Using Single-Beam Nonlinear Optical Interferometry

Tian Zhao, Megan Steves, Brian S. Chapman, Joseph B. Tracy, and Kenneth L. Knappenberger, Jr.Anal. Chem., 122,13702–13707 (2018).

Relaxation Dynamics of Electronically Coupled Au20(SC8H9)15-n-glyme-Au20(SC8H9)15 Monolayer-Protected Cluster Dimers

Patrick J. Herbert, Chongyue Yi, W. Scott Compel, Christopher J. Ackerson, and Kenneth L. Knappenberger, Jr.J. Phys. Chem. C, 122,19251–19258 (2018).

State-Resolved Metal Nanoparticle Dynamics Viewed through the Combined Lenses of Ultrafast and Magneto-optical Spectroscopies

Tian Zhao, Patrick J. Herbert, Hongjun Zheng, and Kenneth L. Knappenberger, Jr.. Acc. Chem. Res., 51,1433-1442 (2018).

Axial point source localization using variable displacement–change point detection

Tian Zhao, Jeremy W. Jarrett, Kyoungweon Park, Richard A. Vaia, and Kenneth L. Knappenberger, Jr..J. Opt. Soc. Am. B, 35, 1140-1148 (2018).

2017

Variable-temperature variable-field magnetic circular photoluminescence (VTVH-MCPL) spectroscopy for electronic-structure determination in nanoscale chemical systems

Patrick J. Herbert, Utsab Mitra, and Kenneth L. Knappenberger, Jr..Opt. Lett., 42, 4833-4836 (2017).

Ligand- and Solvent-Dependent Electronic Relaxation Dynamics of Au25(SR)18 Monolayer-Protected Clusters

Chongyue Yi, Hongjun Zheng, Patrick J. Herbert, Yuxiang Chen, Rongchao Jin, and Kenneth L. Knappenberger, Jr.. J. Phys. Chem. C,121, 24894–24902, (2017)

Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters

Hongjun Zheng, Marcus A. Tofanelli, Christopher J. Ackerson and Kenneth L. Knappenberger, Jr.. Phys. Chem. Chem. Phys., 19, 14471-14477 (2017).

Dissecting charge relaxation pathways in CdSe/CdS nanocrystals using femtosecond two-dimensional electronic spectroscopy

J. W. Jarrett, C. Yi, T. Stoll, J. Rehault, A. Oriana, F. Branchi, G. Cerullo and K. L. Knappenberger, Jr.. Nanoscale, 9, 4572-4577 (2017)

Solvent-dependent absorption and electronic relaxation dynamics of iron (III) tetra-4-N-methylpyridylporphine

Lenzi J. Williamsa, Kenneth L. Knappenberger Jr.. Chem. Phys. Lett., 671, 100-106 (2017).

2016

Characterization of Emissive States for Structurally Precise Au₂₅(SC₈H₉)₁₈0 Monolayer-Protected Gold Nanoclusters Using Magnetophotoluminescence Spectroscopy

Thomas D. Green, Patrick J. Herbert, Chongyue Yi, Chenjie Zeng, Stephen McGill, Rongchao Jin, and Kenneth L. Knappenberger Jr.. J. Phys. Chem. C, 120 (31), 17784–17790 (2016)

Nanoscale Optical Imaging at the Limits of Spatial Accuracy and Temporal Resolution Using Femtosecond NOLES Microscopy

J. W. Jarrett and K. L. Knappenberger, Jr.; Science Advances Today, in press (2016).

Plasmon-Mediated Two-Photon Photoluminescence-Detected Circular Dichroism in Gold Nanosphere Assemblies

J. W. Jarrett, T. Zhao, J. S. Johnson, X. Liu, P. F. Nealey, R. A. Vaia, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry Letters, 7, 765-770 (2016).

Superatom State-Resolved Dynamics of the Au₂₅(SC₈H₉)₁₈⁻ Cluster from Two-Dimensional Electronic Spectroscopy

T. Stoll, E. Sgro, J. W. Jarrett, J. Rehault, A. Oriana, L. Sala, F. Branchi, G. Cerullo, and K. L. Knappenberger, Jr.; Journal of the American Chemical Society, 138, 1788-1791 (2016).

Plasmon Dephasing in Gold Nanorods Studied Using Single-Nanoparticle Interferometric Nonlinear Optical Microscopy

T. Zhao, J. W. Jarrett, J. S. Johnson, K. Park, R. A. Vaia, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry C, 120, 4071-4079 (2016).

2015

Dynamic Diglyme-Mediated Self-Assembly of Gold Nanoclusters

W. S. Compel, O. A. Wong, X. Chen, C. Yi, R. Geiss, H. Hakkinen, K. L. Knappenberger, Jr., and C. J. Ackerson; ACS Nano, 9, 11690-11698 (2015).

Deterministic Construction of Plasmonic Heterostructures in Well-Organized Arrays for Nanophotonic Materials

X. Liu, S. Biswas, J. W. Jarrett, E. Poutrina, A. Urbas, K. L. Knappenberger, Jr., R. A. Vaia, and P. F. Nealey; Advanced Materials, 27, 7314-7319 (2015).

Investigating Plasmonic Structure-Dependent Light Amplification and Electronic Dynamics Using Advances in Nonlinear Optical Microscopy

J. W. Jarrett, T. Zhao, J. S. Johnson, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry C, 119, 15779-15800 (2015).

Feature Article

Communication: SHG-Detected Circular Dichroism Imaging Using Orthogonal Phase-Locked Laser Pulses

J. W. Jarrett, X. Liu, P. F. Nealey, R. A. Vaia, G. Cerullo, and K. L. Knappenberger, Jr.; The Journal of Chemical Physics, 142, 151101-5 (2015).

Emergence of Californium as the Second Transitional Element in the Actinide Series

S. K. Cary, M. Vasiliu, R. E. Baumbach, J. T. Stritzinger, T. D. Green, K. Difenbach, J. N. Cross, K. L. Knappenberger, G. Liu, M. A. Silter, A. E. DePrince, M. J. Polinski, S. M. Van Cleve, J. H. House, N. Kikugawa, A. Gallagher, A. A. Arico, D. A. Dixon, and T. E. Albercht-Schmitt; Nature Communications, 6, 6827 (2015).

Nanometals: Identifying the Onset of Metallic Relaxation Dynamics in Monolayer-Protected Gold Clusters Using Femtosecond Spectroscopy

C. Yi, H. Zheng, L. M. Tvedte, C. J. Ackerson, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry C, 119, 6307-6313 (2015).

The Influence of Surface Passivation on Electronic Energy Relaxation Dynamics of CdSe and CdSe/CdS Nanocrystals Studied Using Visible and Near Infrared Transient Absorption Spectroscopy

C. Yi and K. L. Knappenberger, Jr.; Nanoscale, 7, 5884-5891 (2015).

Nonlinear Chiro-Optical Amplification of Plasmonic Nanolens Arrays Formed via Directed Assembly of Gold Nanoparticles

S. Biswas, X. Liu, J. W. Jarrett, D. Brown, V. Pustovit, A. Urbas, K. L. Knappenberger, Jr., P. F. Nealey, and R. A. Vaia.; Nano Letters, 15, 1836-1842 (2015).

2014

Temperature-Dependent Photoluminescence of Structurally-Precise Quantum-Confined Au₂₅(SC₈H₉)₁₈ and Au₃₈(SC₁₂H₂₅)₂₄ Metal Nanoparticles

T. Green, C. Yi, C. Zeng, R. Jin, S. McGill, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry A, 118, 10611-10621 (2014).

Invited paper for a special issue on Current Topics in Photochemistry.

Chiral Nanostructures Studied Using Polarization-Dependent NOLES Imaging

J. W. Jarrett, P. J. Herbert, S. Dhuey, A. M. Schwartzberg, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry A, A.W. Castleman, Jr. Festschrift. 118, 8393-8401 (2014).

A Tribute to Will Castleman, Jr.

K. L. Knappenberger, Jr., G. E. Johnson, and M. A. El-Sayed; The Journal of Physical Chemistry A, A.W. Castleman, Jr. Festschrift. 118, 8011-8013 (2014).

Unusual Structure, Bonding and Properties in a Californium Borate

M. Polinski, E. Garner III, R. Maurice, N. Planas, J. Stritzinger, T. Parker, J. Cross, T. Green, E. Alekseev, S. Van Cleve, W. Depmeier, L. Gagliardi, M. Shatruk, K. L. Knappenberger, Jr., G. Liu, S. Skanthakumar, L. Soderholm, D. Dixon, and T. Albercht-Schmitt; Nature Chemistry, 6, 387-392 (2014).

Distinguishing Forster Resonance Energy Transfer and Solvent-Mediated Charge-Transfer Relaxation Dynamics in a Ainc(II) Indicator: A Femtosecond Time-Resolved Transient Absorption Spectroscopic Study

K. Sreenath, C. Yi, K. L. Knappenberger, Jr., and L. Zhu; Physical Chemistry Chemical Physics, 16, 5088-5092 (2014).

2013

Optical Properties and Electronic Energy Relaxation of Metallic Au₁₄₄(SR)₆₀ Nanoclusters

C. Yi, M. A. Tofanelli, C. J. Ackerson and K. L. Knappenberger, Jr.; Journal of the American Chemical Society, 135, 18222-18228 (2013).

Panchromatic Light Harvesting and Hot Electron Injection by Ru(II) Dipyrrinates on TiO₂ Surface

L. Guocan, K. Hu, C. Yi, K. L. Knappenberger, Jr., G. J. Meyer, S. I. Gorelsky and M. Shatruk; The Journal of Physical Chemistry C, 117, 17399-17411 (2013).

The Influence of Applied Magnetic Fields on the Optical Properties of Zero- and One-Dimensional CdSe Nanocrystals

D. E. Blumling, S. McGill and K. L. Knappenberger, Jr.; Nanoscale, 5, 9049-9056 (2013).

Optimization of Nonlinear Optical Localization Using Electromagnetic Surface Fields (NOLES) Imaging

J. W. Jarrett, M. Chandra and K. L. Knappenberger, Jr.; The Journal of Chemical Physics, 138, 214202-9 (2013).

Editors’ Choice Article

Plasmonic Nanoparticle Networks Formed Using Iron Porphyrin Molecular Bridges

L. J. Williams, A. M. Dowgiallo and K. L. Knappenberger, Jr.; Physical Chemistry Chemical Physics, 15, 11840-11845 (2013).

Probing the Structure-Property Interplay of Plasmonic Nanoparticle Transducers Using Femtosecond Laser Spectroscopy

K. L. Knappenberger, Jr., A. M. Dowgiallo, M. Chandra and J. W. Jarrett; The Journal of Physical Chemistry Letters, 4, 1109-1119 (2013).

Perspective Article

Nanoparticle Surface Electromagnetic Fields Studied by Single-Particle Nonlinear Optical Spectroscopy

M. Chandra and K. L. Knappenberger, Jr.; Physical Chemistry Chemical Physics, 15, 4177-4182 (2013).

Linking On-State Memory and Distributed Kinetics in Single Nanocrystal Blinking

A. A. Cordonez, K. L. Knappenberger, Jr., and S. R. Leone; The Journal of Physical Chemistry C, 117, 4241-4248 (2013).

2012

Influence of Confined Fluids on Nanoparticle-to-Surroundings Energy Transfer

A. M. Dowgiallo and K. L. Knappenberger, Jr.; Journal of the American Chemical Society, 134, 19393-19400 (2012).

Optical Properties and Coherent Vibrational Oscillations of Gold Nanostars

D. Wheeler, T. D. Green, H. Wang, C. Fernandez-Lopez, L. Liz-Marzan, S. Zou, K. L. Knappenberger, Jr., and J. Z. Zhang; Chemical Physics Letters, 543, 127-132 (2012).

Nanocrystals for Electronic and Optoelectronic Applications

T. Zhu, S. G. Clouthier, I. Ivanov, K. L. Knappenberger, Jr., I. Robel, and F. Zhang; Journal of Nanomaterials, 392742 (2012).

Relaxation Dynamics of Au₂₅L₁₈ Nanoclusters Studied by Femtosecond Time-resolved Near Infrared Transient Absorption Spectroscopy

T. D. Green and K. L. Knappenberger, Jr.; Nanoscale, 4, 4111-4118 (2012).

On the pH-dependent Quenching of Quantum Dot Photoluminescence by Redox Active Dopamine

X. Ji, G. Palui, T. Avellini, H. B. Na, C. Yi, K. L. Knappenberger, Jr., and H. Mattoussi; Journal of the American Chemical Society, 134, 6006-6017 (2012).

2011

Three-Dimensional Interfacial Structure Determination of Hollow Gold Nanosphere Aggregates

S. M. Stagg, K. L. Knappenberger, Jr., A. M. Dowgiallo, and M. Chandra; The Journal of Physical Chemistry Letters, 23, 2946-2950 (2011).

Ultrafast Electron-Phonon Coupling in Hollow Gold Nanospheres

A. M. Dowgiallo and K. L. Knappenberger, Jr.; Physical Chemistry Chemical Physics, 13, 21585-21592 (2011).

Structure-Dependent Coherent Acoustic Vibrations of Hollow Gold Nanospheres

A. M. Dowgiallo, A. M. Schwartzberg, and K. L. Knappenberger, Jr.; Nano Letters, 11, 3258 (2011).

Magneto-Photoluminescence Properties of Colloidal CdSe Nanocrystal Aggregates

D. E. Blumling, T. Tokumoto, S. McGill, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry C, 115, 14517-14525 (2011).

Photodissociation of Thioglycolic Acid Studied by Femtosecond Time-Resolved Transient Absorption Spectroscopy

A. R. Attar, D. E. Bluming, and K. L. Knappenberger, Jr.; The Journal of Chemical Physics, 134, 0254514 (2011).

This paper was highlighted in the Virtual Journal of Nanoscale Science and the Virtual Journal of Ultrafast Science.

2010

Two-Photon Rayleigh Scattering from Isolated and Aggregated Hollow Gold Nanospheres

M. Chandra, A. M. Dowgiallo, and K. L. Knappenberger, Jr.; The Journal of Physical Chemistry C, 114, 19971 (2010).

Controlled Plasmon Resonance Properties of Hollow Gold Nanosphere Aggregates

M. Chandra, A. M. Dowgiallo, and K. L. Knappenberger, Jr.; Journal of the American Chemical Society, 132, 15782 (2010).

Synthesis, Characterization, and Self Organization of Dendrimer-Encapsulated HgTe Quantum Dots

A. Priyam, D. E. Blumling, and K. L. Knappenberger, Jr.; Langmuir, 26, 10636-10644 (2010).

2009

Electronic Relaxation Dynamics in Isolated and Aggregated Hollow Gold Nanospheres

K. L. Knappenberger, Jr., A. M. Schwartzberg, and A. M. Dowgiallo; Journal of the American Chemical Society, 131, 13892 (2009).

University of California, Berkeley

Excitation Wavelength-Dependent Fluorescence Blinking Statistics of Single CdSe Nanorods Studied by Fluorescence Microscopy

K. L. Knappenberger, Jr., D. B. Wong, W. Xu, A. M. Schwartzberg, A. Wolcott, J. Z. Zhang, and S. R. Leone; ACS Nano, 2, 2143 (2008).

Excitation Wavelength-Dependent Fluorescence Intermittency in CdSe/ZnS Quantum Dots Studied by Fluorescence Microscopy

K. L. Knappenberger, Jr., D. B. Wong, Y. E. Romanyuk,  and S. R. Leone; Nano Letters, 7, 3869 (2007).

Stark-aAssisted Population Control of Coherent CS₂ 4f and 5p Rydberg Wavepacket Dynamics Studied by Femtosecond Time-Resolved Photoelectron Spectroscopy

K. L. Knappenberger, Jr., E. W. Lerch, P. Wen, and S. R. Leone; The Journal of Chemical Physics, 127, 124318 (2007).

Coherent Polyatomic Dynamics Studied by Femtosecond Time-Resolved Photoelectron Spectroscopy: Dissociation of Vibrationally Excited CS₂ in the 6s and 4d Rydberg States

K. L. Knappenberger, Jr., E. W. Lerch, P. Wen, and S. R. Leone; The Journal of Chemical Physics, 125, 174314 (2006).

Ultrafast Wave Packet, Coherent Control and Dissociation Dynamics

K. L. Knappenberger, Jr., S. Gilb, V. G. Stavros, E. W. Lerch, E. A. Torres, D. Strasser, L. Lau, and S. R. Leone; Femtochemistry VII: Fundamental ultrafast processes in chemistry, physics, and biology; 14-22, Castleman, A.W., Jr., Kimble, M.L., Eds.; Elsevier: Amsterdam (2006).

Penn State University

Anion Photoelectron Spectrscopy and Density Functional Investigation of Diniobium-Carbon Clusters

K. L. Knappenberger, Jr, M. A. Sobhy, C. E. Jones, Jr., P. Clayborne, S. N. Khanna, and A. W. Castleman, Jr.; ACS Nano, 1, 319 (2007).

Anion Photoelectron Spectrscopy and Density Functional Investigation of Vanadium Carbide Clusters

K. L. Knappenberger, Jr, C. E. Jones, Jr., M. A. Sobhy, I. Iordanov, J. Sofo, and A. W. Castleman, Jr.; The Journal of Physical Chemistry A, 110, 12814-12821 (2006).

Versatile Cluster-Based Photoelectron Spectrometer

K. L. Knappenberger, Jr., M. A. Sobhy, C. E. Jones, and A. W. Castleman, Jr.; Review of Scientific Instruments, 77, 123901 (2006).

Electron Dynamics of Metal Carbon Clusters

K. L. Knappenberger, Jr., C. E. Jones, Jr., M. A. Sobhy, and A. W. Castleman, Jr.; Femtochemistry VII: Fundamental ultrafast processes in chemistry, physics, and biology; 33-38, Castleman, A.W., Jr., Kimble, M.L., Eds.; Elsevier: Amsterdam (2006).

Fitting Mutli-Component Cluster Dynamics

K. L. Knappenberger, Jr. and A. W. Castleman, Jr.; Femtochemistry VII: Fundamental ultrafast processes in chemistry, physics, and biology; 33-38, Castleman, A.W., Jr., Kimble, M.L., Eds.; Elsevier: Amsterdam (2006).

Photodissociation of (SO₂)m(H₂O)n Clusters Employing Femtosecond Pump-Probe Spectroscopy

K. L. Knappenberger, Jr. and A. W. Castleman, Jr.; The Journal of Chemical Physics, 122, 154306 (2005). Also featured in the Virtual Journal of Ultrafast Science, 4 (5) (2005).

The Influence of Cluster Formation on the Photodissociation of Sulfur Dioxide: Excitation to the E State

K. L. Knappenberger, Jr. and A. W. Castleman, Jr.; The Journal of Chemical Physics, 121, 3540-3549, 2004. Also featured in the Virtual Journal of Ultrafast Science, 3 (9) (2004).

Photodissociation of Sulfur Dioxide: The E State Revisited

K. L. Knappenberger, Jr. and A. W. Castleman, Jr.; The Journal of Physical Chemistry A, 108, 9-14, 2004.

Fundamental Cluster Studies of Materials and Atmospheric Chemistry

D. P. Hydutsky, D. E. Bergeron, T. E. Dermota, J. R. Stairs, K. L. Knappenberger, Jr., K. M. Davis, C. E. Jones, M. A. Sobhy, N. J. Bianco, S. J. Peppernick, and A. W. Castleman, Jr.; Proceedings Oof the International Symposium on Cluster Assemblies and Nanoscale Materials, p. 81-87, 2003.

Relaxation Dynamics of Electronically Excited Vanadium-Carbon Clusters: Elucidation of Met-Car

B. D. Leskiw, K. L. Knappenberger, Jr., and A. W. Castleman, Jr.; The Journal of Chemical Physics, 117, 8321-8326, 2002.

Dynamics of Gas Phase Clusters: Insights to Size and Solvation Effects on Electronic Relaxation and Hydrogen Transfer

E. Wisniewski, B. Leskiw, S. Hurley, T. Dermota, D. Hydutsky, K. L. Knappenberger, Jr., M. A. Harshbarger, and A. W. Castleman, Jr.; World Scientific, Femtochemistry and Femtobiology: Ultrafast Dynamics in Molecular Science, Ed: A. Donhal and J. Santamaria, p 21-41, 2002.

Bowling Green State University

Synthesis, Photochemistry, and Electrochemistry of a Series of Phthalocyanines with
Graded Steric Hindrance

G. Cheng, X. Peng, G. Hao, V. O. Kennedy, I. N. Ivanov, K. L. Knappenberger, Jr., T. J. Hill, M. A. J. Rodgers, and M. E. Kenney; The Journal of Physical Chemistry A, 107, 3503-3514, 2003.

PSUseal
ADDRESS                                                 CONTACTS                                  LINKS

Ken Knappenberger                            Email: klk260@psu.edu          Pennsylvania State University
315 Chemistry Building                      Phone: (814) 865-1228           PSU Chemistry
Pennsylvania State University
University Park, PA 16802