PNNL

Garimella's research focuses on computational and experimental aspects of mass spectrometry technology development applied towards highly efficient chemical analysis and highly selective material synthesis. Garimella’s graduate work involved the development of ion sampling and ion transport technologies for miniaturized mass spectrometry systems. At PNNL, Garimella was involved in the design, development, and commercialization of Structures for Lossless Ion Manipulations (SLIM) technology, which is revolutionizing analytical separations applied to panomics applications and complex biological systems analysis. He was awarded the R&D 100 Award for his contributions to SLIM technologies. Additionally, he has several patents granted for inventions pertaining to mass spectrometry and ion mobility spectrometry. Garimella’s current research interests include miniature and field deployable mass spectrometry technologies, mass and structure selective ion soft-landing and characterization, and ion trajectory simulations in multi-scale/multi-physics environments of mass spectrometry systems.

• Ionization and ion transport
• Gas phase ion physics
• Miniaturization of mass spectrometry systems
• Instrumentation development
• Applied computational science

• PhD in Biomedical Engineering, Purdue University, 2012
• MS in Mechanical Engineering, Purdue University, 2009
• BS in Mechanical Engineering, Jawaharlal Nehru Technological University, 2006

• American Society for Mass Spectrometry (2010-Present)

• R&D 100 Award for the development and commercialization of SLIM (2017)

• Garimella, Sandilya V. B.; Ibrahim, Yehia M.; Anderson, Gordon A.; Smith, Richard D. 2015. “Method and apparatus for compressing ions.” USPTO # 9,704,701.
• Ibrahim, Yehia M.; Garimella, Sandilya V. B.; Smith, Richard D. 2019. “Method and device for ion mobility separations.” USPTO # 9,704,701.
• Ibrahim, Yehia M.; Garimella, Sandilya; Prost, Spencer A. 2018. “Systems and methods for integrating ion mobility and ion trap mass spectrometers.” USPTO # 9,939,409.
• Ibrahim, Yehia M.; Garimella, Sandilya; Smith, Richard D. 2018. “Method and apparatus for spatial compression and increased mobility resolution of ions.” USPTO # 10,018,592.
• Garimella, Venkata B. S.; Hamid, Ahmed M.; Ibrahim, Yehia M.; Smith, Richard D. 2019. “Method and apparatus for ion mobility separations utilizing alternating current waveforms.” USPTO # 10,317,364.
• Ibrahim, Yehia M.; Garimella, Sandilya V. B.; Smith, Richard D. 2019. “Method and device for ion mobility separation.” USPTO # 10,424,474.
• Smith, Richard D.; Garimella, Sandilya V. B.; Ibrahim, Yehia M. 2019. “Flexible ion conduit.” USPTO # 10,460,920.
• Ibrahim, Yehia M.; Garimella, Sandilya; Smith, Richard D. 2018. “Method and apparatus for spatial compression and increased mobility resolution of ions.” USPTO # 10,466,202.
• Ibrahim, Yehia M.; Prabhakaran, Aneesh; Garimella, Sandilya V. B.; Smith, Richard D.; Li, Ailin. 2019. “Methods and systems for ion manipulation.” USPTO # 10,497,552.
• Prabhakaran, Aneesh; Ibrahim, Yehia M.; Garimella, Sandilya V. B. 2020. “Frequency modulated radio frequency electric field for ion manipulation.” USPTO # 10,692,710.

2020

• Li A., et al, “Assessing Collisional Cross Section Calibration Strategies for Traveling Wave Based Separations in SLIM”, Analytical Chemistry, 92(22), 14976-14982
• Conant CR., et al, “Evaluation of Waveform Profiles for Traveling Wave Ion Mobility Separations in SLIM”, JASMS
• Li A., et al, “Ion Mobility Spectrometry with High Ion Utilization Efficiency Using Traveling Wave Based SLIM”, Analytical Chemistry, 92(22), 14930-14938
• Nagy G., Attah IK., Conant CR., Liu W., Garimella SVB., Gunawardena HP., Shaw J., Smith RD., Ibrahim YM., 2020, “Rapid and Simultaneous Characterization of Drug Conjugation in Heavy and Light Chains of a Monoclonal Antibody Revealed by High-Resolution Ion Mobility Separations in SLIM”, Analytical Chemistry, 92, 5004-5012
• Hollerbach A.L., A. Prabhakaran Nair Syamala Amma, A. Li, G. Nagy, C.P. Harrilal, C.R. Conant, and R.V. Norheim, et al. 2020. "Ultra-High-Resolution Ion Mobility Separations Over Extended Path Lengths and Mobility Ranges Achieved using a Multilevel Structures for Lossless Ion Manipulations Module." Analytical Chemistry 92, no. 11:7972 - 7979. PNNL-SA-152421. doi:10.1021/acs.analchem.0c01397
• Li A., V. Garimella, and Y.M. Ibrahim. 2020. "A Simulation Study of the Influence of the Traveling Wave Patterns on Ion Mobility Separations in Structures for Lossless Ion Manipulations." Analyst 145, no. 1:240-248. PNNL-SA-145853. doi:10.1039/C9AN01509D

2019

• Attah I.K., G. Nagy, V. Garimella, R.V. Norheim, G.A. Anderson, Y.M. Ibrahim, and R.D. Smith. 2019. "Traveling-wave-based electrodynamic switch for concurrent dual-polarity ion manipulations in Structures for Lossless Ion Manipulations." Analytical Chemistry 91, no. 22:14712-14718. PNNL-SA-147653. doi:10.1021/acs.analchem.9b03987
• Attah I.K., V. Garimella, I.K. Webb, G. Nagy, R.V. Norheim, C.E. Schimelfenig, and Y.M. Ibrahim, et al. 2019. "Dual Polarity Ion Confinement and Mobility Separations." Journal of the American Society for Mass Spectrometry 30, no. 6:967-976. PNNL-SA-132014. doi:10.1007/s13361-019-02138-1
• Garimella V., G. Nagy, Y.M. Ibrahim, and R.D. Smith. 2019. "Opening new paths for biological applications of ion mobility - Mass spectrometry using structures for lossless ion manipulations." Trends in Analytical Chemistry. TrAC 116. PNNL-SA-140349. doi:10.1016/j.trac.2019.04.021
• Nagy G., K. Kedia, I.K. Attah, V. Garimella, Y.M. Ibrahim, V.A. Petyuk, and R.D. Smith. 2019. "Separation of ß-Amyloid Tryptic Peptide Species with Isomerized and Racemized L-Aspartic Residues with Ion Mobility in Structures for Lossless Ion Manipulations." Analytical Chemistry 91, no. 7:4374-4380. PNNL-SA-138885. doi:10.1021/acs.analchem.8b04696

• Wojcik R., G. Nagy, I.K. Attah, I.K. Webb, V. Garimella, K.K. Weitz, and A.L. Hollerbach, et al. 2019. "SLIM Ultrahigh Resolution Ion Mobility Spectrometry Separations of Isotopologues and Isotopomers Reveal Mobility Shifts due to Mass Distribution Changes." Analytical Chemistry 91, no. 18:11952-11962. PNNL-SA-147394. doi:10.1021/acs.analchem.9b02808

2018

• Chouinard C.D., G. Nagy, I.K. Webb, V. Garimella, E.M. Baker, Y.M. Ibrahim, and R.D. Smith. 2018. "Rapid Ion Mobility Separations of Bile Acid Isomers Using Cyclodextrin Adducts and Structures for Lossless Ion Manipulations." Analytical Chemistry 90, no. 18:11086-11091. PNNL-SA-136059. doi:10.1021/acs.analchem.8b02990
• Hamid A.M., A. Prabhakaran Nair Syamala Amma, V. Garimella, Y.M. Ibrahim, and R.D. Smith. 2018. "Characterization of applied fields for ion mobility separations in traveling wave based structures for lossless ion manipulations (SLIM)." International Journal of Mass Spectrometry 430. PNNL-SA-127372. doi:10.1016/j.ijms.2018.03.006
• Nagy G., C.D. Chouinard, I.K. Attah, I.K. Webb, V. Garimella, Y.M. Ibrahim, and E.M. Baker, et al. 2018. "Distinguishing Enantiomeric Amino Acids with Chiral Cyclodextrin Adducts and Structures for Lossless Ion Manipulations." Electrophoresis 39, no. 24:3148-3155. PNNL-SA-136376. doi:10.1002/elps.201800294
• Nagy G., I.K. Attah, V. Garimella, K. Tang, Y.M. Ibrahim, E.M. Baker, and R.D. Smith. 2018. "Unraveling the Isomeric Heterogeneity of Glycans: Ion Mobility Separations in Structures for Lossless Ion Manipulations." Chemical Communications 54, no. 83:11701-11704. PNNL-SA-137134. doi:10.1039/C8CC06966B
• Prabhakaran Nair Syamala Amma A., A.M. Hamid, V. Garimella, B.R. Valenzuela, R.G. Ewing, Y.M. Ibrahim, and R.D. Smith. 2018. "A Hybrid Constant and Oscillatory Field Ion Mobility Analyzer in Structures for Lossless Ion Manipulations." Journal of the American Society for Mass Spectrometry 29, no. 2:342-351. PNNL-SA-126448. doi:10.1007/s13361-017-1841-6

2017

• Deng L., I.K. Webb, V. Garimella, A.M. Hamid, X. Zheng, R.V. Norheim, and S.A. Prost, et al. 2017. "Serpentine Ultralong Path with Extended Routing (SUPER) High Resolution Traveling Wave Ion Mobility-MS using Structures for Lossless Ion Manipulations." Analytical Chemistry 89, no. 8:4628-4634. PNNL-SA-123438. doi:10.1021/acs.analchem.7b00185
• Deng L., V. Garimella, A.M. Hamid, I.K. Webb, I.K. Attah, R.V. Norheim, and S.A. Prost, et al. 2017. "Compression Ratio Ion Mobility Programming (CRIMP) Accumulation and Compression of Billions of Ions for Ion Mobility-Mass Spectrometry Using Traveling Waves in Structures for Lossless Ion Manipulations (SLIM)." Analytical Chemistry 89, no. 12:6432-6439. PNNL-SA-123357. doi:10.1021/acs.analchem.7b00189
• Garimella V., I.K. Webb, A. Prabhakaran Nair Syamala Amma, I.K. Attah, Y.M. Ibrahim, and R.D. Smith. 2017. "Design of a TW-SLIM Module for Dual Polarity Confinement, Transport, and Reactions." Journal of the American Society for Mass Spectrometry 28, no. 7:1442-1449. PNNL-SA-123670. doi:10.1007/s13361-017-1680-5
• Ibrahim Y.M., A.M. Hamid, J.T. Cox, V. Garimella, and R.D. Smith. 2017. "Ion Elevators and Escalators in Multi-level Structures for Lossless Ion Manipulations." Analytical Chemistry 89, no. 3:1972-1977. PNNL-SA-122334. doi:10.1021/acs.analchem.6b04500

• Ibrahim Y.M., A.M. Hamid, L. Deng, V. Garimella, I.K. Webb, E.M. Baker, and R.D. Smith. 2017. "New Frontiers for Mass Spectrometry based upon Structures for Lossless Ion Manipulations." Analyst 142, no. 7:1010-1021. PNNL-SA-123137. doi:10.1039/C7AN00031F
• Tummalacherla M., V. Garimella, S.A. Prost, and Y.M. Ibrahim. 2017. "Toward Artifact-Free Data in Hadamard Transform-Based Double Multiplexing of Ion Mobility - Orbitrap Mass Spectrometry." Analyst 142, no. 10:1735-1745. PNNL-SA-123964. doi:10.1039/C7AN00289K

2016

• Chen T., Y.M. Ibrahim, I.K. Webb, V. Garimella, X. Zhang, A.M. Hamid, and L. Deng, et al. 2016. "Mobility-Selected Ion Trapping and Enrichment Using Structures for Lossless Ion Manipulations." Analytical Chemistry 88, no. 3:1728-1733. PNNL-SA-113681. doi:10.1021/acs.analchem.5b03910
• Deng L., Y.M. Ibrahim, A.M. Hamid, V. Garimella, I.K. Webb, X. Zheng, and S.A. Prost, et al. 2016. "Ultra-High Resolution Ion Mobility Separations Utilizing Traveling Waves in a 13-m Serpentine Path Length Structures for Lossless Ion Manipulations Module." Analytical Chemistry 88, no. 18:8957-8964. PNNL-SA-118270. doi:10.1021/acs.analchem.6b01915
• Deng L., Y.M. Ibrahim, E.S. Baker, N.A. Aly, A.M. Hamid, X. Zhang, and X. Zheng, et al. 2016. "Ion Mobility Separations of Isomers based upon Long Path Length Structures for Lossless Ion Manipulations Combined with Mass Spectrometry." ChemistrySelect 1, no. 10:2396-2399. PNNL-SA-116187. doi:10.1002/slct.201600460
• Deng L., Y.M. Ibrahim, V. Garimella, I.K. Webb, A.M. Hamid, R.V. Norheim, and S.A. Prost, et al. 2016. "Greatly Increasing Trapped Ion Populations for Mobility Separations Using Traveling Waves in Structures for Lossless Ion Manipulations." Analytical Chemistry 88, no. 20:10143-10150. PNNL-SA-119618. doi:10.1021/acs.analchem.6b02678
• Garimella V., A.M. Hamid, L. Deng, Y.M. Ibrahim, I.K. Webb, E.M. Baker, and S.A. Prost, et al. 2016. "Squeezing of Ion Populations and Peaks in Traveling Wave Ion Mobility Separations and Structures for Lossless Ion Manipulations using Compression Ratio Ion Mobility Programming." Analytical Chemistry 88, no. 23:11877-11885. PNNL-SA-121131. doi:10.1021/acs.analchem.6b03660
• Garimella V., Y.M. Ibrahim, K. Tang, I.K. Webb, E.M. Baker, A.V. Tolmachev, and T. Chen, et al. 2016. "Spatial Ion Peak Compression and its Utility in Ion Mobility Spectrometry." Journal of the American Society for Mass Spectrometry 27, no. 6:1128-1135. PNNL-SA-114168. doi:10.1007/s13361-016-1371-7
• Hamid A.M., V. Garimella, Y.M. Ibrahim, L. Deng, X. Zheng, I.K. Webb, and G.A. Anderson, et al. 2016. "Achieving high resolution ion mobility separations using traveling waves in compact multi-turn Structures for Lossless Ion Manipulations modules." Analytical Chemistry 88, no. 18:8949-8956. PNNL-SA-118269. doi:10.1021/acs.analchem.6b01914
• Ibrahim Y.M., V. Garimella, S.A. Prost, R. Wojcik, R.V. Norheim, E.M. Baker, and I. Rusyn, et al. 2016. "Development of an Ion Mobility Spectrometry-Orbitrap Mass Spectrometer Platform." Analytical Chemistry 88, no. 24:12152-12160. PNNL-SA-123568. doi:10.1021/acs.analchem.6b03027
• Webb I.K., V. Garimella, R.V. Norheim, E.S. Baker, Y.M. Ibrahim, and R.D. Smith. 2016. "A Structures for Lossless Ion Manipulations (SLIM) Module for Collision Induced Dissociation." Journal of the American Society for Mass Spectrometry 27, no. 7:1285-1288. PNNL-SA-115654. doi:10.1007/s13361-016-1397-x

2015

• Garimella V., Y.M. Ibrahim, I.K. Webb, A.B. Ipsen, T. Chen, A.V. Tolmachev, and E.S. Baker, et al. 2015. "ION MANIPULATIONS IN STRUCTURES FOR LOSSLESS ION MANIPULATIONS (SLIM): COMPUTATIONAL EVALUATION OF A 90o TURN AND A SWITCH." Analyst 140, no. 20:6845-6852. PNNL-SA-107773. doi:10.1039/c5an00844a
• Hamid A.M., Y.M. Ibrahim, V. Garimella, I.K. Webb, L. Deng, T. Chen, and G.A. Anderson, et al. 2015. "Characterization of Traveling Wave Ion Mobility Separations in Structures for Lossless Ion Manipulations." Analytical Chemistry 87, no. 22:11301-11308. PNNL-SA-111147. doi:10.1021/acs.analchem.5b02481
• Zhang X., V. Garimella, S.A. Prost, I.K. Webb, T. Chen, K. Tang, and A.V. Tolmachev, et al. 2015. "Ion Trapping, Storage, and Ejection in Structures for Lossless Ion Manipulations." Analytical Chemistry 87, no. 12:6010-6016. PNNL-SA-107651. doi:10.1021/acs.analchem.5b00214

2014

• Garimella V., Y.M. Ibrahim, I.K. Webb, A.V. Tolmachev, X. Zhang, S.A. Prost, and G.A. Anderson, et al. 2014. "Simulation of Electric Potentials and Ion Motion in Planar Electrode Structures for Lossless Ion Manipulations (SLIM)." Journal of the American Society for Mass Spectrometry 25, no. 11:1890-1896. PNNL-SA-103104. doi:10.1007/s13361-014-0976-y
• Ibrahim Y.M., V. Garimella, A.V. Tolmachev, E.S. Baker, and R.D. Smith. 2014. "Improving Ion Mobility Measurement Sensitivity by Utilizing Helium in an Ion Funnel-Trap." Analytical Chemistry 86, no. 11:5295-5299. PNNL-SA-100190. doi:10.1021/ac404250z
• Tolmachev A.V., I.K. Webb, Y.M. Ibrahim, V. Garimella, X. Zhang, G.A. Anderson, and R.D. Smith. 2014. "Characterization of Ion Dynamics in Structures for Lossless Ion Manipulations." Analytical Chemistry 86, no. 18:9162-9168. PNNL-SA-103154. doi:10.1021/ac502054p
• Webb I.K., V. Garimella, A.V. Tolmachev, T. Chen, X. Zhang, J.T. Cox, and R.V. Norheim, et al. 2014. "Mobility-Resolved Ion Selection in Uniform Drift Field Ion Mobility Spectrometry/Mass Spectrometry; Dynamic Switching in Structures for Lossless Ion Manipulations." Analytical Chemistry 86, no. 19:9632-9637. PNNL-SA-103347. doi:10.1021/ac502139e
• Webb I.K., V. Garimella, A.V. Tolmachev, T. Chen, X. Zhang, R.V. Norheim, and S.A. Prost, et al. 2014. "Experimental Evaluation and Optimization of Structures for Lossless Ion Manipulations for Ion Mobility Spectrometry with Time-of-Flight Mass Spectrometry." Analytical Chemistry 86, no. 18:9169-9176. PNNL-SA-103224. doi:10.1021/ac502055e