The CHIME Center

Expertise

Nanomaterials chemistry: discovery, rational design, and development of novel, ultra-stable colloidal quantum emitters, unique synthesis and assembly techniques, e.g., automated synthesis, microfluidics-enabled nanowire growth, and scanning-probed-enabled direct-write nanointegration.

Nanomaterials applications: e.g., bioimaging, solid-state lighting and single-photon quantum light sources. 

CINT Capabilities POC

Semiconductor Nanocrystal Synthesis: Optical Nanomaterials by Design

Non-Blinking Quantum Dots: Synthesis and Applications

Dip-Pen Nanolithography (DPN) Nanoink 5000 System: Nano-Mesoscale Materials Integration/ Single-Photon-Source Fabrication/Hybrid-Materials Creation

NanoSight Pro Nanoparticle Analyzer

FLS1000 Steady State and Fluorescence Lifetime Spectrometer & Quantitative Quantum Yield: UV-Vis-NIR

Nanonics Imaging Ltd. MultiView 4000 Multiprobe: Nanointegration & Multimodal Characterization

Semiconductor Nanowires: Solution-Phase Synthesis and Novel Flow-Solution-Liquid-Solid Growth

Fully Automated Batch Reactor System (FABRS)

Education

Postdoc: 1999-2001, Nanomaterials Chemistry, LANL, Los Alamos, NM 

PhD: 1999, Inorganic Chemistry, Washington University, St. Louis, MO

BA: 1992, Chemistry (Phi Beta Kappa), Grinnell College, Grinnell, IA

Orchid/Research Gate/Google Scholar Links

https://scholar.google.com/citations?user=vtB1wZcAAAAJ&hl=en

Highlighted Publications/Current Research

Representative Publications (>18,000 citations; h-index: 56)

1. Zhang, S.; Traverso, A. J.; Dolgopolova, E. A.; Singh, A.; Kishida, H.; Livshits, M. Y.; Sheehan, C. J.; Bowes, E. G.; Li, C.; Hollingsworth, J. A.; Mikkelsen, M. H. Solution-Processed Ultrafast, Room-Temperature Single-Photon Source at 1550 nm. ACS Nano 2025, 19, 19035-19045.

2. Mishra, S.; Bowes, E.; Majumder, S.; Hollingsworth, J.; Htoon, H.; Jones, A. Inducing Circularly Polarized Single-Photon Emission via Chiral Induced Spin Selectivity. ACS Nano 2024, 18, 8663. 

3. Lubotzky, B.; Nazarov, A.; Abudayyeh, H.; Antoniuk, L.; Lettner, N.; Agafonov, V.; Bennett, A. V.; Majumder, S.; Chandrasekaran, V.; Bowes, E. G.; Htoon, H.; Hollingsworth, J. A.; Kubanek, A.; Rapaport, R. Room-Temperature Fiber-Coupled Single-Photon Sources based on Colloidal Quantum Dots and SiV Centers in Back-Excited Nanoantennas. Nano Lett. 2024 24, 640-648. 

4. Singh, A.; Majumder, A.; Thompson Orfield, N. J.; Sarpkaya, I.; Nordlund, D.; Bustillo, K. C.; Ciston, J.; Nisoli, V.; Ivanov, S.; Bowes, E. G.; Htoon, H.; Hollingsworth, J. A. From Inside Out: How the Buried Interface, Shell Defects, and Surface Chemistry Conspire to Determine Optical Performance in Nonblinking Giant Quantum Dots. Small Sci. 2023, 3, 2300092. 

5. Dolgopolova, E. A.; Li, D.; Hartman, S. T.; Watt, J.; Ríos, C.; Hu, J.; Kukkadapu, R.; Casson, J.; Bose, R.; Malko, A. V.; Blake, A. V.; Ivanov, S.; Roslyak, O.; Piryatinski, A.; Htoon, H.; Chen, H.-H.; Pilania, G.; Hollingsworth, J. A. Strong Purcell Enhancement at Telecom Wavelengths Afforded by Spinel Fe3O4 Nanocrystals with Size-Tunable Plasmonic Properties. Nanoscale Horiz. 2022, 7, 267. 

6. Krishnamurthy, S., Singh, A., Hu, Z., Blake, A. V., Kim, Y., Singh, A., Dolgopolova, E. A., Williams, D. J., Piryatinski, A., Malko, A. V., Htoon, H., Sykora, M., Hollingsworth, J. A. PbS/CdS Quantum Dot Room-Temperature Single-Emitter Spectroscopy Reaches the Telecom O and S Bands via an Engineered Stability. ACS Nano 2021, 15, 575. 

7. McBride, J., Mishra, N., Click, S., Orfield, N., Wang, F., Acharya, K., Chisholm, M., Htoon, H., Rosenthal, S., Hollingsworth, J. A. Role of Shell Composition and Morphology in Achieving Single-Emitter Photostability for Green-Emitting 'Giant' Quantum Dots. J. Chem. Phys. 2020, 152, 124713. 

8. Dennis, A. M., Buck, M. R., Wang, F., Hartmann, N. F., Majumder, S., Casson, J. L., Doorn, S. K., Htoon, H., Sykora, M., Hollingsworth, J. A. Role of Interface Chemistry in Opening New Radiative Pathways in InP/CdSe Giant Quantum Dots with Blinking-Suppressed Two-Color Emission. Adv. Funct. Mater. 2019, 29, 1809111. 

9. Orfield, N. J., Majumder, S., McBride, J. R., Koh, F. Y.-C., Singh, A., Bouquin, S. J., Casson, J. L., Johnson, A. D., Sun, L., Li, X., Shih, C.-K., Rosenthal, S., Hollingsworth, J. A.*, Htoon, H.* Photophysics of Thermally-Assisted Photobleaching in “Giant” Quantum Dots Revealed in Single Nanocrystals. ACS Nano 2018, 12, 4206. 

10. Hanson, C. J., Hartmann, N. F., Singh, A., Ma, X. DeBenedetti, W. J. I., Casson, J. L., Grey, J. K., Chabal, Y. J., Malko, A. V., Htoon, H., Hollingsworth, J. A. Giant PbSe/CdSe/CdSe Quantum Dots: Crystal-Structure-Defined Ultrastable Near-Infrared Photoluminescence from Single Nanocrystals. J. Am. Chem. Soc. 2017, 139, 11081. 

11. Mishra, N., Orfield, N. J., Wang, F., Hu, Z., Krishnamurthy, S., Malko, A. V., Casson, J. L., Htoon, H., Sykora, M., Hollingsworth, J. A. Using shape to turn off blinking for two-colour multiexciton emission in CdSe/CdS tetrapods. Nature Commun. 2017, 8, 15083. 

12. Karan, N. S., Keller, A. M., Sampat, S., Roslyak, O., Arefin, A., Hanson, C. J., Casson, J. L., Desireddy, A., Ghosh, Y., Piryatinski, A., Iyer, R. , Htoon, H., Malko, A. V. & Hollingsworth, J. A., Plasmonic Giant Quantum Dots: Hybrid Semiconductor-Metal Nanostructures for Truly Simultaneous Optical Imaging, Photothermal Effect and Thermometry. Chem. Sci. 2015, 6, 2224. 

13. Laocharoensuk, R.; Palaniappan, K.; Smith, N. A.; Dickerson, R. M.; D. Werder, Baldwin, J. K.; Hollingsworth, J. A. Flow-Based Solution–Liquid–Solid Nanowire Synthesis, Nature Nanotechnol. 2013, 8, 660. 

14. Ghosh, Y.; Mangum, B.D.; Casson, J. L.; Williams, D. J.; Htoon, H.; Hollingsworth, J. A. New Insights into the Complexities of Shell Growth and the Strong Influence of Particle Volume in Non-Blinking “Giant” Core/Shell Nanocrystal Quantum Dots. J. Am. Chem. Soc. 2012, 134, 9634. 

15. Dennis, A. M.; Mangum, B.; Piryatinski, A.; Park, Y.-S.; Hannah, D.; Casson, J.; Williams, D.; Schaller, R.; Htoon, H.; Hollingsworth, J. A. Suppressed Blinking and Auger Recombination in Near-Infrared Type-II InP/CdS Nanocrystal Quantum Dots. Nano Lett. 2012, 12, 5545.

16. Kundu, J.; Ghosh, Y.; Dennis, A. M.; Htoon, H.; Hollingsworth, J. A. Giant Nanocrystal Quantum Dots: Stable Down-Conversion Phosphors that Exploit a Large Stokes Shift and Efficient Shell-to-Core Energy Relaxation. Nano Lett., 2012, 12, 3031.

17. Pal, B.N.; Ghosh, Y.; Brovelli, S.; Laocharoensuk, R.; Klimov, V.I.; Hollingsworth, J.A.*; Htoon, H.* ‘Giant’ CdSe/CdS Core/Shell Nanocrystal Quantum Dots as Efficient Electroluminescent Materials: Strong Influence of Shell Thickness on Light-Emitting Diode Performance. Nano Lett. 2012, 12, 331.

18. Chen, Y.; Vela, J.; Htoon, H.; Casson, J. L.; Werder, D. J.; Bussian, D. A.; Klimov, V. I.; Hollingsworth, J. A., “Giant” multishell CdSe nanocrystal quantum dots with suppressed blinking. J. Am. Chem. Soc. 2008, 130, 5026.

19. Jeong, S.; Achermann, M.; Nanda, J.; Ivanov, S.; Klimov, V. I.; Hollingsworth, J. A. Effect of the thiol-thiolate equilibrium on the photophysical properties of aqueous CdSe/ZnS nanocrystal quantum dots. J. Am. Chem. Soc. 2005, 127, 10126.

20. Pietryga, J. M.; Schaller, R. D.; Werder, D.; Stewart, M. H.; Klimov, V. I.; Hollingsworth, J. A. Pushing the Band Gap Envelope: Mid-Infrared Emitting Colloidal PbSe Quantum Dots. J. Am. Chem. Soc. 2004, 126, 11752.

Awards

ACS Fellow (2024); AAAS Fellow, Chemistry, Section C (2019); APS Fellow, Division of Materials Physics (2018); LANL Laboratory Fellow (2016); 9 LANL science/program achievement awards (2001-2024); 2 LANL Mentoring Awards (2005, 2023)