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Search Publications by: Arvind Balijepalli (Fed)

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Displaying 1 - 25 of 33

High-Resolution DNA Hybridization Kinetics Measurements with Double Gate FD-SOI Transistors

January 23, 2023
Seulki Cho, Alexander Zaslavsky, Curt A. Richter, Jacob Majikes, James Alexander Liddle, Francois Andrieu, Sylvain Barraud, Arvind Balijepalli
Double gate fully depleted SOI transistors operating in a remote gate configuration and under closed-loop feedback allow noise performance that exceeds their single gate counterparts by more than an order of magnitude. We leverage this high performance to

High-performance dual-gate graphene pH sensors

June 28, 2022
Son Le, Seulki Cho, Alexander Zaslavsky, Curt A. Richter, Arvind Balijepalli
High precision biophysical measurements that are portable and performed without prior labeling of the molecules can greatly benefit several areas of biotechnology and biophysics, but existing techniques often lack sufficient resolution. Field-effect

Diffusion-limited reactions in nanoscale electronics

September 22, 2020
Ryan Evans, Arvind Balijepalli, Anthony J. Kearsley
To quantify interactions between drug molecules and target receptors, a novel nanoscale electronics instrument is under development. The instrument consists of two regions: a biological region, and an electronics region. The biological region consists of a

High-Resolution Biochemical Activity Measurements with Commercial Transistors

September 1, 2020
Seulki Cho, Son T. Le, Curt A. Richter, Arvind Balijepalli
We demonstrate that single-gated, commercially-sourced, field-effect transistors (FETs) operated with a lock- in amplifier (LIA) under closed-loop control can achieve an average pH resolution of 9x10^-4. This performance represents an 8-fold improvement

Rapid, quantitative therapeutic screening for Alzheimer's enzymes enabled by optimal signal transduction with transistors

April 14, 2020
Son T. Le, Michelle A. Morris, Antonio Cardone, Nicholas B. Guros, Jeffery B. Klauda, Brent A. Sperling, Curt A. Richter, Harish C. Pant, Arvind Balijepalli
We show that commercially sourced n-channel silicon field-effect transistors (nFETs) operating under closed-loop control achieve a resolution of (7.2+/-0.3)x10-3 pH units with a bandwidth of 10 Hz. The results represent an 3-fold improvement in performance


September 27, 2019
Arvind K. Balijepalli, Son T. Le, Harish C. Pant, Curt A. Richter
We have developed biosensors based on dual-gated field-effect transistors (FETs) that operate at the quantum capacitance limit. The FETs are fabricated with atomically thin MoS2 semiconducting films and top-gated with a room temperature ionic-liquid. The

Quantum Capacitance-Limited MoS2 Biosensors Enable Remote Label-Free Enzyme Measurements

August 7, 2019
Son T. Le, Nicholas B. Guros, Robert C. Bruce, Antonio Cardone, Niranjana D. Amin, Siyuan Zhang, Jeffery B. Klauda, Harish C. Pant, Curt A. Richter, Arvind Balijepalli
We have demonstrated atomically thin, quantum capacitance-limited, field-effect transistors (FETs) that enable the detection of pH changes with 75-fold higher sensitivity (4.4 V/pH) over the Nernst value of 59 mV/pH at room temperature when used as a

Reproducible Performance Improvements to Monolayer MoS2 Transistors through Exposed Material Forming Gas Annealing

April 16, 2019
Nicholas B. Guros, Son T. Le, Siyuan Zhang, Brent A. Sperling, Jeffery B. Klauda, Curt A. Richter, Arvind Balijepalli
We have developed an optimized process to realize high-performance field-effect transistor (FET) arrays from large-area 2D MoS2 films with an average yield of 85 %. A central element of the technique is a new exposed film forming gas anneal (EF- FGA) that

Novel Nanofluidic Chemical Cells based on Self-Assembled Solid-State SiO2 Nanotubes

August 30, 2017
Hao Zhu, Haitao Li, Arvind Balijepalli, Joseph W. Robertson, Sergiy Krylyuk, Albert Davydov, John J. Kasianowicz, John S. Suehle, Qiliang Li
Novel nanofluidic chemical cells based on self-assembled solid-state SiO2 nanotubes on silicon- on-insulator (SOI) substrates have been successfully fabricated and tested. The vertical SiO2 nanotubes with a smooth cavity are built from Si nanowires which

MOSAIC: A Modular Single Molecular Analysis Interface for Decoding Multi-state Nanopore Data

October 31, 2016
Jacob H. Forstater, Kyle Briggs, Joseph W. Robertson, Jessica H. Benjamini, Olivier M. Marie-Rose, Canute I. Vaz, John J. Kasianowicz, Vincent Tabard-Cossa, Arvind Balijepalli
Single molecule measurements with nanometer-scale pores are being developed for a wide range of diagnostic and therapeutic applications.  Critical to the method is the ability to accurately and precisely detect the presence of an analyte, quantify its

An Optomechanical Accelerometer with a High-Finesse Hemispherical Optical Cavity

February 22, 2016
Yiliang Bao, Felipe Guzman, Arvind Balijepalli, John Lawall, Jacob Taylor, Thomas W. LeBrun, Jason J. Gorman
A new design for an optomechanical accelerometer is presented. The design includes a hemispherical optical cavity that can achieve high finesse and a proof mass that is well-constrained by silicon nitride beams. Based on previous work and analysis, the

Quantifying short-lived events in multistate ionic current measurements

January 7, 2014
Arvind K. Balijepalli, Jessica H. Benjamini, Andrew T. Cornio, Joseph W. Robertson, Kin P. Cheung, John J. Kasianowicz, Canute I. Vaz
We developed a generalized technique to characterize polymer!nanopore interactions via single channel ionic current measurements. Physical interactions between analytes, such as DNA, proteins, or synthetic polymers, and a nanopore cause multiple discrete

Temperature sculpting in yoctoliter volumes

February 14, 2013
Joseph E. Reiner, Joseph W. Robertson, Daniel L. Burden, Lisa K. Burden, Arvind Balijepalli, John J. Kasianowicz
The ability to perturb large ensembles of molecules from equilibrium led to major advances in understanding reaction mechanisms in chemistry and biology. Here, we demonstrate the ability to control, measure, and make use of rapid temperature changes of

The Effects of Diffusion on an Exonuclease/Nanopore-Based DNA Sequencing Engine

December 7, 2012
Joseph E. Reiner, Joseph W. Robertson, Arvind Balijepalli, Daniel L. Burden, Bryon S. Drown, John J. Kasianowicz
The ability to electronically detect and characterize individual polynucleotides as they are driven through a single protein ion channel may eventually prove useful for rapidly sequencing DNA (base-by-base) in a ticker tape-like fashion. More recently, a

PEG-Labeled Nucleotides and Nanopore Detection for Single Molecule DNA Sequencing by Synthesis

September 21, 2012
Shiv Kumar, Tao Chuanjuan, Chien Minchen, Hellner Brittney, Joseph W. Robertson, Arvind Balijepalli, Li Zengmin, James J. Russo, Joseph E. Reiner, John J. Kasianowicz, Jingyue Ju
There is a significant need to accurately sequence single DNA and RNA molecules for personalized medicine. We describe a novel nanopore-based sequencing by synthesis (SBS) strategy that will accurately differentiate at single molecule level four different