Publications since 2015 

(Representative works marked by * )

46. Devon S. Jakob, Nengxu Li, Huanping Zhou, and Xiaoji G. Xu “Integrated Tapping Mode Kelvin Probe Force Microscopy with Photo-induced Force Microscopy for Correlative Chemical and Surface Potential Mapping Small, DOI:10.1002/smll.202102495 (2021)

45. Haomin Wang, Qing Xie, Yu Zhang, and Xiaoji G. Xu “Photothermally Probing Vibrational Excited-State Absorption with Nanoscale Spatial Resolution through Frequency Domain Pump-Probe Peak Force Infrared Microscopy The Journal of Physical Chemistry C 125, 15, 8333-8338 (2021)

44.* Haomin Wang, Joseph M. González-Fialkowski, Wenqian Li, Qing Xie, Yan Yu, and Xiaoji G. Xu “Liquid-Phase Peak Force Infrared Microscopy for Chemical Nano-imaging and SpectroscopyAnalytical Chemistry, 93, 7, 3567-3575  (2021)

43. Yi Zhang, Celalettin Yurdakul, Alexander J. Devaux, Le Wang, Xiaoji G. Xu, John H. Connor, M. Selim Ünlü, and Ji-Xin Cheng “Vibrational Spectroscopic Detection of a Single Virus by Mid-Infrared Photothermal Microscopy ” Analytical Chemistry,  93, 8, 4100-4107 (2021)

42. Haomin Wang, Le Wang, Eli Janzen, James H. Edgar, and Xiaoji G. Xu “Total Internal Reflection Peak Force Infrared MicroscopyAnalytical Chemistry, 93, 2, 731–736 (2021)

41. Miao Li, Haomin Wang, Wenqian Li, Xiaoji G. Xu, and Yan Yu,”Macrophage activation on “phagocytic synapse” arrays: Spacing of nanoclustered ligands directs TLR1/2 signaling with an intrinsic limit” Science Advances, 6, 49, eabc8482  (2020)

40. Claudia Gusenbauer, Tiina Nypelö, Devon S. Jakob, Xiaoji G. Xu, Dmitri V. Vezenov, Shirin Asaadi,  Herbert Sixta, and Johannes Konnerth “Differences in surface chemistry of regenerated lignocellulose fibers determined by chemically sensitive scanning probe microscopy” International Journal of Biological Macromolecules, 165, 2520-2527, (2020)

39. Claudia Gusenbauer, Devon S. Jakob, Xiaoji G. Xu, Dmitri V. Vezenov, Etienne Cabane, and Johannes Konnerth “Nanoscale chemical features of the natural fibrous material wood” Biomacromolecules, 21, 10, 4244–4252 (2020)

38. Haomin Wang, Le Wang, Yuequn Shang, Sajedehalsadat Yazdanparast Tafti, Wenpeng Cao, Zhijun Ning, X. Frank Zhang, and Xiaoji G. Xu “Peak force visible microscopySoft Matter, 16, 8372-8379 (2020) (2021 Soft Matter Emerging Investigators)

37.* Devon S. Jakob, Haomin Wang, Guanghong Zeng, Daniel E. Otzen, Yong Yan, and Xiaoji G. Xu  “Peak Force Infrared – Kelvin Probe Force MicroscopyAngewandte Chemie Int. Ed., 59, 16083  (2020)

36. Wenqian Li, Haomin Wang, Xiaoji G. Xu, and Yan Yu “Simultaneous Nanoscale Imaging of Chemical and Architectural Heterogeneity on Yeast Cell Wall Particles” Langmuir,  36, 22, 6169–6177 (2020)

35.* Haomin Wang, Eli Janzen, Le Wang, James, H. Edgar, and Xiaoji G. Xu  “Probing Mid-Infrared Phonon Polaritons in the Aqueous PhaseNano Letters, 20, 5, 3986-3991 (2020)

34.* Devon S. Jakob, Haomin Wang, and Xiaoji G. Xu  “Pulsed Force Kelvin Probe Force MicroscopyACS Nano, 14, 4, 4839-4848 (2020)

 33.* Haomin Wang, Jiahan Li, James, H. Edgar, and Xiaoji G. Xu    “Three-dimensional Near-field Analysis Through Peak Force Scattering-type Near-field Optical MicroscopyNanoscale, 12, 1817-1825  (2020)

32. Le Wang, Martin Wagner, Haomin Wang, Siuling Pau-Sanchez, Jiahan Li, James H. Edgar, and Xiaoji G. Xu “Revealing Phonon Polaritons in Hexagonal Boron Nitride by Multi-Pulse Peak Force Infrared MicroscopyAdvanced Optical Materials, 8, 1901084 (2020)

31. Le Wang, Devon S. Jakob, Haomin Wang, Alexis Apostolos, Marcos Pires, Xiaoji  G. Xu “Generalized Heterodyne Configurations for Photo-induced Force Microscopy” Analytical Chemistry,  91, 20, 13251–13259 (2019) 

30. Cassandra Phillips, Leonid Gilburd, Xiaoji G. Xu, and Gilbert C. Walker “Surface and Volume Phonon Polaritons in Boron Nitride Nanotubes”  The Journal of Physical Chemistry Letters,  10, 17, 4851-4856 (2019)

29. Devon S. Jakob, Le Wang, Haomin Wang, and Xiaoji G. Xu  “Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial ResolutionAnalytical Chemistry, 91, 14, 8883-8890 (2019)

28. , and 

27.*Haomin Wang, Le Wang, Devon S. Jakob, and Xiaoji G. Xu “Tomographic and Multimodal Scattering-Type Scanning Near-field Optical Microscopy with Peak Force Tapping ModeNature Communications,  9:2005 (2018)

26. Martin Wagner, Devon S. Jakob, Steve Horne, Henry Mittel, Sergey Osechinskiy, Cassandra Phillips, Gilbert C. Walker, Chanmin Su and Xiaoji G. Xu “Ultra-broadband Nano-spectroscopy with a Laser-driven Plasma SourceACS Photonics, 5, 4, 1467 (2018)

25. Jian-Hua Jiang, Xiaoji G. Xu, Leonid Gilburd, and Gilbert C. Walker “Optical hot-spots in boron-nitride nanotubes at mid infrared frequencies: one-dimensional localization due to random-scattering” Optics Express,  25, 25059 (2017)

24. Le Wang, Dandan Huang, Chak K. Chan, Yong Jie Li, and Xiaoji G. Xu “Nanoscale spectroscopic and mechanical characterization of individual aerosol particles using peak force infrared microscopyChemical Communications,  53, 7397 (2017)  (2017 ChemComm Emerging Investigators)

23.* Le Wang, Haomin Wang, Martin Wagner, Yong Yan, Devon S. Jakob and Xiaoji G. Xu “Nanoscale Simultaneous Chemical and Mechanical Imaging via Peak Force Infrared MicroscopyScience Advances, 3, 6, e1700255 (2017)

22. Haomin Wang, Le Wang, Devon S. Jakob, and Xiaoji G. Xu “Mapping three-dimensional near-field responses with reconstruction scattering-type scanning near-field optical microscopy” AIP Advances, 7, 055118 (2017)

21. Haomin Wang, Le Wang and Xiaoji G. Xu “Scattering-type Scanning Near-field Optical Microscopy with Low Repetition Rate Pulsed Light Source through Phase-domain Sampling”  Nature Communications, 7:13212 (2016)

20. Xiaoji G. Xu, Leonid Gilburd, Yoshio. Bando, Dmitri Golberg and Gilbert C. Walker, “Defects and Deformation of Boron Nitride Nanotubes Studied by Joint Nanoscale Mechanical and Infrared Near-Field MicroscopyThe Journal of Physical Chemistry C, 120 (3), 1945,  (2016).

19. Leonid Gilburd, Xiaoji G. Xu, Yoshio Bando, Dmitri Golberg and Gilbert C. Walker, “Near-Field Infrared Pump–Probe Imaging of Surface Phonon Coupling in Boron Nitride Nanotubes” The Journal of Physical Chemistry Letters,  7 (2) 289 (2016)

18. Le Wang and Xiaoji G. Xu “Scattering Type Scanning Near-field Optical Microscopy with Reconstruction of Vertical Interaction”  Nature Communications, 6:8973  (2015).

Publications 2007-2014, Prior to research career as PI

17. X. G. Xu, L. Gilburd, and G. C Walker  “Phase Stabilized Homodyne of Infrared Scattering Type Scanning Near-field Optical Microscopy”  Applied Physics Letters, 105 (26), 263104 2014

16. X. G. Xu, J-H. Jiang, L. Gilburd, C. Zhi, Y. Bando, D. Golberg, and G. C Walker  “Mid-Infrared Polaritonic Coupling between Boron Nitride Nanotubes and Graphene” ACS Nano, 8 (11) 11305 2014

15. B. G. Ghamsari,  X.G. Xu,  L. Gilburd,  and G. C Walker, P. Berini,  “Mid-infrared surface phonon polaritons in boron-nitride nanotubes” Journal of Optics, 16 (11) 114008, 2014

14. H. U. Yang, R. L. Olmon, K. S. Deryckx, X. G. Xu, H. A. Bechtel, Y. Xu, B. A. Lail and M. B. Raschke, Accessing the Optical Magnetic Near-Field through Babinet’s Principle  ACS Photonics, 1, 894. 2014

13*. X. G. Xu, B. G. Ghamsari, J-H. Jiang L. Gilburd, G. O. Andreev, C. Zhi, Y. Bando, D. Golberg, P. Berini, and G. C Walker  “One-dimensional surface phonon polaritons in boron nitride nanotubes” Nature Communications, 5:4782 2014 (high-lighted in Nature Materials 13, 1081–1083 2014)

12. X. G. Xu, A. E. Tanur, and G. C. Walker “Phase Controlled Homodyne Infrared Near- field Microscopy Reveal Inhomogeneity within and among Individual Boron Nitride Nanotubes ” Journal of Physical Chemistry A, 117 (16), 3348, 2013 (featured in cover)

11. S. Pirotta, X. G. Xu; A. Delfan, S. Mysore, S. Maiti, G. Dacarro, M. Patrini, M. Galli, G. Guizzetti, D. Bajoni, J. Sipe, G. C. Walker, and M. Liscidini “Surface Enhanced Raman Scattering in Purely Dielectric Structures via Bloch Surface Waves” Journal of Physical Chemistry C, 117 (13), 6821, 2013

10. X. G. Xu, and M. B. Raschke “Near-field Infrared Vibrational Dynamics and Tip-Enhanced Decoherence ” Nano Letters, 13 (4), 1588, 2013

9. X. G. Xu, M. Rang, I. M. Craig and M. B. Raschke “Pushing the Sample Size Limit of Infrared Vibrational Nanospectroscopy: From Monolayer towards Single Molecule Sensitivity ” Journal of Physical Chemistry Letters, 3 (13), 1836, 2012

8. S. Berwerger, J. Atkins, X. G. Xu, R. L. Olmon, and M. B. Raschke “ Ultrafast nanofocusing with full optical waveform control ” Nano Letters, 11 (10), 4309, 2011

7. A. Anderson†, K. S. Deryckx†, X. G. Xu†, G. Steinmeyer and M. B. Raschke “Few-Femtosecond Plasmon Dephasing of a Single Metallic Nanostructure from Optical Response Function Reconstruction by Interferometric Frequency Resolved Optical Gating” Nano Letters, 10 (7), 2519, 2010 († equal contribution)

6. S. O. Konorov, X. G. Xu, J. W. Hepburn, and V. Milner.  “Characterization of transient molecular vibration excited with shaped femtosecond pulses.” Journal of Chemical Physics, 130, 234505, 2009

5. S. O. Konorov, X. G. Xu, J. W. Hepburn, and V. Milner “Narrowband Spectroscopy by All-optical Correlation of Broadband pulses.” Phys. Rev. A, 79, 031801 2009 (Rapid Communication)

4. X. G. Xu, S. O. Konorov, J. W. Hepburn, and V. Milner “Background-free Coherent Raman Spectroscopy by Detecting the Spectral Phase of Molecular Vibrations.” Optics Letters, 33 (11): 1177-1179. 2008

3. X .G. Xu, S. O. Konorov, J. W. Hepburn, and V. Milner. “Noise autocorrelation spectroscopy with coherent Raman scattering.” Nature Physics, 4(2): 125-129. 2008

2. S. O. Konorov, X. G. Xu, M. W. Blades, R. B. Turner, J. W. Hepburn, and V. Milner “Pulse optimization for Raman spectroscopy with cross-correlation frequency resolved optical gating.” Optics Express, 15 (12): 7564-7571. 2007

1*. X. G. Xu, S. O. Konorov, S. Zhdanovich, J. W. Hepburn, and V. Milner. “Complete characterization of molecular vibration using frequency resolved gating.” Journal of Chemical Physics, 126, 091102-5 2007 (rapid communication)